Battery Equivalents and Replacements

Best Lawn Mower Battery - Types, Sizes, and Replacements

Lawn mower, tractor, and garden starting batteries are used for starting/cranking internal combustion engines and sometimes for powering other electric loads, including lights, smaller winches, various pumps, and similar devices.

When looking for a new battery, one must pay attention to several details in order to get the right battery that will serve well for years ahead.

On This Page:

- Intro to Lawn Mower, Lawn Tractor, and Garden Starting Batteries

- Most Common Lawn Mower Starting Battery Sizes

- Few Final Words

riding lawn mower w400px Intro to Lawn Mower, Lawn Tractor, and Garden Starting Batteries

Riding lawn mowers, lawn tractors, power generators, and other tools and appliances are commonly powered by internal combustion engines which use small rechargeable batteries for starting.

Most of such vehicles, tools, and appliances also feature a manual recoil starting system, but it is much more convenient to press the button or turn the key and start the engine - just like in the cars ...

The size of the internal combustion engines found in power generators, lawn mowers, and tractors vary from just 2-3 HPs to large 30-40 HP gas engines powering large riding lawn mowers. And because of that, starting batteries used in such vehicles and devices vary from small batteries being able to provide few dozens of CCA Amps to larger batteries being able to crank even a smaller car.

When looking for a lawn mower battery replacements, there are few things to consider first:

Voltage of the Battery

ytx5l bs mMost riding lawn mowers use 12V batteries, but there are also some models, especially smaller ones that use 6V batteries.

Since most of the manufacturers tend to move to 12V electric systems, in this article, we are going to discuss only 12V batteries.

Battery Chemistry Type

There are basically two types of batteries used as starting batteries - lithium and lead-acid batteries.

Lithium batteries, even Lithium Iron Phosphate (LiFePO4) batteries are rather sensitive power sources that feature Battery Management Systems (BMS) that make their use much safer, since BMS protects the battery from unwanted events like overcharge, over-discharge, over-current, short-circuit, over-temperature, etc.

Thanks to the built-in BMS, lithium batteries can be recharged using onboard alternators and often using older style lead-acid battery chargers (model dependent), but they should NOT be recharged using modern intelligent lead-acid battery chargers - such chargers can even damage the BMS system and void the lithium battery warranty.

Although the lithium starting batteries are several times lighter than lead-acid batteries, weight savings for lawn mowers and tractors and other similar vehicles and garden tools and appliances are not worth the price difference and potential complications. IMHO, of course.

When compared with lithium batteries, the lead-acid batteries are much heavier, have issues with capacity decrease when being discharged with strong currents, they don't support a large number of charging/discharging cycles, etc.

But, as starting batteries, lead-acid batteries are very reliable, robust, very tolerant to charging conditions, and they are much cheaper than lithium batteries.

Lead-acid batteries differ in design and can be wet/flooded, enhanced wet/flooded, Absorbent Glass Mat (AGM), and Gel-Cell batteries.

Since AGM and Gel-Cell batteries are spill-proof and maintenance-free batteries, they are recommended models for lawn mowers, lawn tractors, power generators, etc.

Terminal Position and Type

Batteries come with different terminal types and with different terminal orientations.

When buying a new battery, be sure that the terminals and their orientation of the new battery match the terminal type and orientation of the old battery.

If they don't, one may have issues in connecting the new battery. If that happens, the workaround is to use cable extensions and terminal adapters.

However, the best thing to do is to get the battery with the same terminal type and orientation.

Fortunately, most starting batteries come with standardized terminals depending on their size/group.

yuasa ytx12 bs

Cold Cranking Amps (CCA)

CCA (Cold Cranking Amps) is the maximum current that a new, fully charged, 12V battery can deliver for 30 seconds, with the voltage NOT dropping below 7.2V, at 0°F (-18°C).

The new battery replacement for starting applications should have the same or better CCA rating in order to perform well.

Battery Capacity (Ah)

The capacity of lead-acid batteries is determined by how many amps of current can new, fully charged 12V battery at 80°F (~25°C), deliver for 20 hours without its voltage falling below 10.5V.

The capacity of starting/cranking batteries is often given for a period of 10 hours and not 20 hours - they are, after all, not designed nor intended for deep discharge applications.

Reserve Capacity (RC)

RC (Reserve Capacity) is a number of minutes that a new, fully charged battery (at 80°F, ~25°C) can deliver 25A current and maintain voltage above its cut-off value (10.5V for lead-acid batteries). RC value is important for deep cycle batteries used in marine applications (for trolling motors, for example), RVs (in-house batteries), solar systems (off-the-grid applications), etc., and not so for riding lawn mowers, lawn tractors, and similar.

Of course, sometimes there are other things to consider when buying a new lawn mower battery, but these are the most important ones.

Most Common Lawn Mower Starting Battery Sizes

The following cross-reference chart lists some of the most popular lawn mower batteries with their most important features and specifications.

Note: Capacity, CCA, and weight are given for the lead-acid batteries.

Battery Size Dimensions (inches/mm) Capacity CCA Weight
U1 & U1R 7.75 x 5.1875 x 7.3125
197 x 132 x 186 
35 Ah (20h) 300-320 22-26 lbs
10-11.8 kg
YTX30L-BS 6.5625 x 4.9375 x 6.875
166 x 126 x 175
30 Ah (10h) 360-400 17-22 lbs
7.7-10 kg
YTX24HL-BS 8.0625 x 3.4375 x 6.375
205 x 87 x 162 
21 Ah (10h) 300-350 13-18 lbs
5.9-8.2 kg
YTX20L-BS 6.875 x 3.4375 x 6.125
175 x 87 x 155 
14-20 Ah (10h) 220-330 11-14 lbs
5.0-6.4 kg
YTX14-BS 5.875 x 3.4375 x 5.75
150 x 87 x 146 
12-14 Ah (10h) 190-235 8-11 lbs
3.6-5.0 kg
YTX12-BS 5.875 x 3.5 x 5.125
150 x 88 x 130 
10 Ah (10h) 160-210 7-10 lbs
3.1-4.5 kg
YTX9-BS 5.875 x 3.4375 x 4.125
150 x 87 x 105 
6-8 Ah (10h) 120-180 6-8 lbs
2.7-3.7 kg
YTX5L-BS 4.4375 x 2.75 x 4.125
113 x 70 x 105 
4 Ah (10h) 70-80 3.3-4.5 lbs
1.5-2 kg

As one can see, CCA values differ from 70-80 Amps for YTX5L-BS batteries to 400+ Amps for YTX30L-BS AGM batteries, while lithium models often can provide 500 or even more starting Amps.

 More information about battery groups can be found at Powersports, ATV, and Motorcycle Battery Cross Reference Chart and BCI Battery Group Size Chart.


Best Group U1 & U1R Battery Equivalents and Replacements

group u1 battery mBCI Group U1 and U1R batteries are mostly general purpose/deep cycle batteries with only very few models being designed as dual-purpose and/or starting batteries.

Groups U1 and U1R batteries physical dimensions are (L x W x H) 7 3/4 x 5 3/16 x 7 5/16 inches (~197 x 132 x 186 mm) with the U1 battery having a positive terminal on the left side, and U1R having a positive terminal post on the right side of the battery (hence the 'R' as part of the label).

Average lead-acid U1/U1R battery 10-20h capacity is usually in the 33-37 Ah range and average weight around 23-26 pounds.

As starting batteries, best U1/U1R batteries feature CCA ratings in the 300-320 range, while most of the batteries are able to provide at least 300 Amps for 3-5 seconds, with some models being able to provide 500+ Amps for 3-5 seconds.

The following cross-reference chart lists the most popular U1/U1R batteries with their most important features and specifications.

Model Battery Type Chemistry 20h Capacity Discharge Characteristics Weight (lbs/kg) Review
Chrome U1 Battery Deep Cycle AGM 35 525 Amps (5 s) 23.5 lbs; 10.7 kg -
Deka 8AMU1R Starting AGM - 320 CCA; 45 min RC (25 Amps, down to 10.5V) 25 lbs; 11.3 kg -
Everlast 12350DC-NB Deep Cycle AGM 35 - 23.5 lbs; 10.7 kg -
ExpertPower EXP12330 Deep Cycle AGM 33 (10h) 21.09 Amps, 60 minutes, down to 10.5 volts 23.8 lbs; 10.8 kg ExpertPower EXP12330
Interstate Batteries DCM0035 Deep Cycle AGM 35 - 22.9 lbs; 10.4 kg -
Mighty Max ML35-12 Deep Cycle AGM 37 330 Amps (5 s); 17.2 Amps, 60 minutes, down to 10.5 volts 23.1 lbs; 10.5 kg -
Mighty Max ML-U1-CCAHR Dual Purpose AGM 18 (10h) 320 CCA; ~20 Amps, 30 min, down to 9.6 volts 14.57 lbs; 6.6 kg -
MotoBatt MBU1-35 Deep Cycle AGM 35 - 26 lbs; 11.8 kg -
NPP NP12-35Ah Deep Cycle AGM 35 - 23.1 lbs; 10.5 kg -
Power-Sonic PS-12350 Deep Cycle AGM 35 350 Amps (10 s); 25 Amps, 60 minutes, down to 9 volts 24.7 lbs; 11.2 kg -
PowerStar PS12-35-D Deep Cycle AGM 35 - 23 lbs; 10.4 kg -
SigmasTek SP12-35 Deep Cycle AGM 35 - 24.7 lbs; 11.2 kg -
Universal UB12350 Deep Cycle AGM 35 315 CCA; 18 Amps, 60 minutes, down to 10.5 volts 24.4 lbs; 11.1 kg -
VMAXTANKS V35-857 Deep Cycle AGM 35 300 CCA; 75 min RC (25 Amps, down to 10.5V) 25 lbs; 11.3 kg -
VMAXTANKS VPG12C-50Li Deep Cycle Lithium 50 150 Amps (3 s), 100 Amps (5 s), 50 Amps Continuously 12 lbs; 5.4 kg -
Weize LFP1235 Deep Cycle AGM 35 (10h) 350 Amps (5 s); 20.4 Amps, 60 minutes, down to 10.5 volts 23.2 lbs; 10.5 kg -

Note: Amazon affiliate links ('Model' column) in the table open in the new windows, feel free to check them for the most up-to-date offers and prices.

Best BCI Group U1 and U1R AGM batteries include:

vmaxtanks v35 857 w150- VMAXTANKS V35-857 battery which features a CCA rating of 300 Amps and an RC value of 75 minutes at an acceptable weight of 25 pounds (~11.3 kg).

VMAXTANKS V35-857 battery is labeled as a dual-purpose battery, but it is an excellent all-around performer and is commonly used as a starting battery in lawn mowers and lawn tractors that use U1 batteries. Also, it is often used as a kayak trolling battery, as a small off-the-grid battery, as a solar battery, as a backup/UPS battery, and similar.

- Mighty Max ML-U1-CCAHR battery is a specially designed U1 lawn mower and tractor battery. It is lighter than other U1 batteries and weighs only 14.57 pounds (~6.6 kg) and features a 10h capacity of 'only' 18 Ah.

But, Mighty Max ML-U1-CCAHR also features a CCA rating of 320 Amps and is able to provide 20 Amps for 30 minutes down to 9.6 volts.

For applications requiring only starting/cranking U1 battery, Mighty Max ML-U1-CCAHR is perhaps the best choice.

- Weize LFP1235 is another excellent all-around performer, being able to provide 350 Amps for 5 seconds and 20.4 Amps for 60 minutes, down to 10.5 volts. Also, it is one of the lighter AGM U1 batteries, weighing 23.2 pounds (~10.5 kg).

Of course, other batteries in the chart are also commonly used in applications requiring U1 and U1R batteries and are tested by numerous users in real-life situations on a daily basis.

 


Best Group YTX30L-BS Battery Equivalents and Replacements

chrome ytx30l bs w150pxYTX30L-BS batteries feature physical dimensions of (L x W x H) 6.5625 x 4.9375 x 6.875 inches (166 x 126 x 175 mm) and are some of the largest Motorcycle/Powersports batteries, optimized for starting/cranking applications.

As such, YTX30L-BS batteries commonly have CCA ratings better than larger and heavier U1 and U1R batteries - on average, YTX30L-BS batteries feature a CCA rating of 280-385 Amps for lead-acid batteries and 480-720 Amps for lithium batteries.

10h capacity of the YTX30L-BS batteries varies around 28-30 Ah for lead-acid batteries, while the capacity of lithium batteries varies greatly and is usually in the 10-20 Ah range.

One of the very interesting features of YTX30L-BS batteries is that the negative battery terminal is set to the left, hence the 'L' as the part of the label - YTX30L-BS battery.

The following cross-reference chart lists some of the most popular lead-acid and lithium YTX30L-BS batteries, with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Banshee DLFP30-HL 12.5 625 (Lithium) 6.3 lbs; 2.86 kg
Banshee YTX30L-BS 28 350 22 lbs; 9.97 kg
Chrome 30L-BS Zipp 30 385 -
Chrome YTX30L-BS 30 385 19.8 lbs; 8.97 kg
Energizer TX30L 30 385 21.6 lbs; 9.8 lbs
Kepworth KP30L-BS 19 720 (Lithium) 7.29 lbs; 3.3 kg
Mighty Max YTX30L-BS 30 385 21.4 lbs; 9.7 kg
MMG YIX30L-BS MMG-7 - 480 (Lithium) 4.18 lbs; 1.9 kg
PowerStar YTX30L-BS 30 385 -
Shotgun YTX30L-BS 28 280 22 lbs; 9.97 kg
Yuasa YUAM22H30 YB30L-B 30 300 13.22 lbs; 6.0 kg
Yuasa YUAM6230X YIX30L-BS 30 385 22 lbs; 9.97 kg
Weize YTX30L-BS 30 385 17.7 lbs; 8.1 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

As one can see, there are several YTX30L-BS AGM batteries that feature a 10h capacity of 30Ah and a CCA rating of 385 Amps, with the most popular models being Chrome YTX30L-BS, Weize YTX30L-BS, Yuasa YIX30L-BS, etc.

Although AGM batteries are generally very good all-around performers and YTX30L-BS batteries can be used for powering various other loads, not just engine starters, they are designed for high-current applications and they should be used as such.

 


Best Group YTX24HL-BS Battery Equivalents and Replacements

yuasa ytx24hl bs w150pxYTX24HL-BS batteries feature physical dimensions of (L x W x H) 8.0625 x 3.4375 x 6.375 inches (205 x 87 x 162 mm), 10h capacity of ~21 Ah, and CCA rating in the 260-350 Amps for AGM/Gel-Cell batteries and up to 420 Amps for the lithium batteries.

Despite having a 30-40% smaller capacity than YTX30L-BS batteries, YTX24HL-BS batteries feature CCA ratings that are very close to the CCA ratings of the YTX30L-BS batteries. YTX24HL-BS batteries are designed as 'High Performance' batteries, hence the 'H' as part of their labels - YTX24HL-BS battery.

Also, YTX24HL-BS batteries feature a negative battery terminal to the left side of the battery, hence the 'L' as part of their label - YTX24HL-BS battery.

The following cross-reference chart lists some of the most popular YTX24HL-BS batteries with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Chrome YTX24HL-BS 21 300 13.11 lbs; 5.94 kg
Chrome YTX24HL-BS Pirate Bay 21 300 13.11 lbs; 5.94 kg
Energizer TX24HL 21 350 16 lbs; 7.25 kg
EverLast CTX24HL-BS 21 330 18 lbs; 8.16 kg
Mighty Max YTX24HL-BS 21 260 15 lbs; 6.78 kg
Mighty Max YTX24HL-BS Gel 21 210 14.35 lbs; 6.5 kg
MMG YTX24HL-BS 7 420 (Lithium) 4 lbs; 1.81 kg
PowerStar PM24HL-BS 24 320 17 lbs; 7.7 kg
Yuasa YTX24HL-BS 21 350 17 lbs; 7.7 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

chrome ytx24hl bs w150pxLithium YTX24HL-BS batteries are not yet as popular as AGM/Gel-Cell batteries - they are used in high-performance motorcycles, snowmobiles, and similar vehicles where weight savings of 10-12 pounds can lead to improved performances, justifying the price difference and lower actual capacity.

Although YTX24HL-BS batteries are smaller than YTX30L-BS and especially U1 and U1R batteries, they can often crank/start surprisingly large engines.

For lawn mowers, lawn tractors, power generators, and other similar applications, AGM and Gel-Cell batteries are the most cost-effective batteries and the recommended ones.

 


Best Group YTX20L-BS and YTX20HL-BS Battery Equivalents and Replacements

yuasa ytx20hl w150pxYTX20L-BS and YTX20HL-BS batteries share the same physical dimension and terminal orientation ('L' - negative to the LEFT side of the battery), but the YTX20HL-BS batteries are considered as 'High-Performance' versions of the 'basic' YTX20L-BS batteries.

Physical dimensions of these batteries are (L x W x H)  6.875 x 3.4375 x 6.125 inches (175 x 87 x 155 mm).

YTX20L-BS lead-acid batteries feature a 10h capacity of 14-19 Ah, a CCA rating of 220-270 Amps, and a weight of 12.5-15.0 pounds.

YTX20HL-BS lead-acid batteries feature a similar 10h capacity of 18-19 Ah and weight of 13-15 pounds, but the CCA rating is higher and is around ~310 Amps, allowing YTX20HL-BS to crank larger engines more easily.

Lithium YTX20L-BS/YTX20HL-BS batteries are not as common as lead-acid sealed batteries, but they offer a weight savings of around 10 pounds and are able to provide stronger currents, generally in the 350-500 Amps range.

The following cross-reference chart lists some of the most popular YTX20L-BS and YTX20HL-BS batteries with their most important features and specifications.

Model 10h Capacity (Ah)
CCA (Amps) Weight (lbs/kg)
Banshee 20HL-BS 18 500 (Lithium) 4.95 lbs; 2.24 kg
Banshee YTX20L-BS 18 310 18 lbs; 8.16 kg
Battery Tender BTL20A360CW 6.1 360 (Lithium) 3.42 lbs; 1.55 kg
Chrome YTX20HL-BS Pirate Bay 18 310 13.22 lbs; 6.0 kg
Chrome YTX20L-BS 18 270 13.88 lbs; 6.29 kg
Energizer TX20HL 18 310 13.67 lbs; 6.2 kg
EverLast CTX20HL-BS 18 310 14.89 lbs; 6.75 kg
EverLast CTX20L-BS 14 220 13.77 lbs; 6.24 kg
Mighty Max YTX20L-BS 18 270 13 lbs; 5.9 kg
MMG YTX20L-BS MMG-6 - 420 (Lithium) 3.09 lbs; 1.4 kg
Niche YTX20HL-BS 18 310 13.62 lbs; 6.17 kg
Niche YTX20L-BS 18 270 12.5 lbs; 5.67 kg
PowerStar YTX20L-BS 18 220 15 lbs; 6.8 kg
SigmasTek STX20HL-BS 18 310 13.44 lbs; 6.1 kg
SigmasTek STX20L-BS 19 270 11.61 lbs; 5.26 kg
Weize YTX20HL-BS 18 310 12.85 lbs; 5.82 kg
Weize YTX20L-BS 18 270 12.59 lbs; 5.7 kg
Yuasa YTX20HL-BS 18 310 13.91 lbs; 6.3 kg
Yuasa YTX20L-BS 18 270 14.85 lbs; 6.73 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

weize ytx20l w150pxAs one can see, many brands manufacture both YTX20L-BS and YTX20HL-BS batteries, despite very similar performances.

YTX20L-BS batteries are designed with reliability, robustness, and vibration resistance in mind and are, as such, perhaps a better choice for lawn mowers, lawn tractors, power generators, and similar vehicles and applications.

On the other hand, YTX20HL-BS batteries are designed with performance in mind and are, as such, a better choice for high-performance motorcycles, ATVs, snowmobiles, and similar.

And thanks to the advanced AGM and Gel-Cell technologies, these batteries are also very reliable and vibration resistant.

 


Best Group YTX14-BS Battery Equivalents and Replacements

chrome ytx14 bs igel w150YTX14-BS batteries feature physical dimensions of 5.875 x 3.4375 x 5.75 inches (150 x 87 x 146 mm) and the same with less popular YTX14L-BS batteries (negative battery terminal to the Left).

YTX14-BS and YTX14L-BS lead-acid batteries feature a 10h capacity of 12-14 Ah and a CCA rating of 190-235 Amps.

They weigh 9-11 pounds.

YTX14-BS and YTX14L-BS lithium batteries are not as common as lead-acid batteries, but they ensure weight savings of some 7-8 pounds while having a CCA rating of 300-500 Amps.

Note: there are several battery dimensions that share a very similar label, but they differ in size, including YTX14AH-BS and YTX14AHL-BS batteries which feature physical dimensions of (L x W x H) 5.25 x 3.5 x 6.5625 inches (134 x 89 x 166 mm), ~12Ah 10h capacity and 190-235 CCA rating.

The following cross-reference chart lists some of the most popular YTX14-BS batteries with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Review
Banshee YTX14L-BS 8 380 (Lithium) 3.1 lbs; 1.41 kg -
Chrome YTX14-BS iGel 12 200 9.92 lbs; 4.5 kg -
Chrome YTX14-BS Pirate Bay 12 200 9.7 lbs; 4.4 kg -
EverLast CTX14-BS 12 190 10.71 lbs; 4.85 kg -
ExpertPower ETX14-BS 14 220 10 lbs; 4.53 kg -
Kepworth KP14L-BS - 480 (Lithium) 3.06 lbs; 1.39 kg -
Mighty Max YTX14-BS Battery 12 200 9.92 lbs; 4.5 kg -
Mighty Max YTX14-BS Gel 12 200 10.42 lbs; 4.72 kg -
MMG YTX14-BS MMG-4 - 300 (Lithium) 2 lbs; 0.91 kg -
PowerStar PM14-BS-HD 14 225 10 lbs; 4.53 kg -
SigmasTek YTX14-BS 12 200 9.5 lbs; 4.3 kg -
Upstart UB-YTX14-BS 12 200 9.9 lbs; 4.49 kg -
Weize YTX14-BS 12 235 9.46 lbs; 4.29 kg Weize YTX14-BS
Yuasa YTX14-BS 12 200 10.2 lbs; 4.6 kg -

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

weize ytx14 bs w150pxLithium YTX14-BS batteries are gaining in popularity, but AGM YTX14-BS are still much more popular type.

Manufacturers of lithium starting batteries, YTX14-BS size included, often label their batteries with the 'lead-acid equivalent' capacity, although their batteries have a much smaller actual capacity.

Although actual capacity is of lesser importance for starting batteries, parasite loads may discharge smaller capacity lithium batteries much faster than the larger lead-acid AGM and Gel-Cell batteries.

To prevent issues due to the parasite loads, some manufacturers include in their lithium batteries over-discharge protection with the Reset Button - when the parasite loads discharge the battery too low, BMS cut-off the battery from the vehicle. By pressing Reset Button, the user can activate the battery which still has enough charge left to more or less safely crank the engine.

Note: Such system is NOT present in all lithium starting batteries, YTX14-BS batteries included.

 


Best Group YTX12-BS Battery Equivalents and Replacements

yuasa ytx12 bs w150pxYTX12-BS batteries are very similar in size to YTX14-BS batteries - their physical dimensions are 5.875 x 3.5 x 5.125 inches (150 x 88 x 130 mm).

Lead-acid YTX12-BS batteries feature a 10h capacity of ~10 Ah, CCA rating in the 180-210 Amps range and they weigh 7-10 pounds.

Since YTX12-BS batteries are very popular Motorsport/Powersport batteries, many manufacturers also offer lithium YTX12-BS starting battery which offer weight savings of 6-7 pounds, smaller capacity, but a better CCA rating of 250-500 Amps.

For high-performance and professional applications, lithium YTX12-BS batteries are highly recommended, but for residential riding lawn mowers and tractors, a good AGM or Gel-Cell YTX12-BS battery is the way to go.

The following cross-reference chart lists some of the most popular AGM, Gel-Cell, and Lithium YTX12-BS batteries with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Anti-Gravity AG-ATX-12-HD 8 480 (Lithium) 3 lbs; 1.36 kg
Banshee 12-BS 10 330 (Lithium) 3.45 lbs; 1.57 kg
Battery Tender BTL12A270CW 4.5 270 (Lithium) 2.54 lbs; 1.15 kg
Chrome YTX12-BS 10 175 7.21 lbs; 3.27 kg
Chrome YTX12-BS iGel 10 180 7.78 lbs; 3.53 kg
Energizer TX12 10 180 8.8 lbs; 4.0 kg
ExpertPower YTX12-BS 10 - 8.86 lbs; 4.02 kg
ExpertPower YTX12-BS(iGEL) 10 190 7.5 lbs; 3.4 kg
Mighty Max YTX12-BS 10 180 8.4 lbs; 3.80 kg
Mighty Max YTX12-BS Gel 10 180 8.4 lbs; 3.80 kg
Mighty Max YTX12-BS 3.5 250 (Lithium) 1.0 lbs; 0.45 kg
MMG YTX12-BS 4.0 280 (Lithium) 2 lbs; 0.91 kg
PowerStar PS12-BS 10 180 9 lbs; 4.1 kg
Shorai LFX18A1-BS12 6 270 (Lithium) 2.19 lbs; 1.0 kg
SigmasTek STX12-BS 10 180 8.06 lbs; 3.65 kg
Weize YTX12-BS 10 210 7.06 lbs; 3.2 kg
Yuasa YTX12-BS 10 180 9.27lbs; 4.2 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

chrome ytx12 bs w150pxAlthough their capacity is relatively small, AGM and Gel-Cell YTX12-BS batteries are often used even in deep discharge applications, like small kayak trolling motor batteries for quick hops from one position to another, as fish-finder battery, small inverter batteries, and similar.

Although starting AGM and Gel-Cell batteries are much tolerant to deep discharges than wet/flooded starting batteries, they should not be used as such - few cycles down to 50-80% DoD will not harm these batteries if they are soon after the discharge cycle recharged (preferably) using a smart AGM/Gel-Cell battery charger.

Also, be aware that a semi-discharged lead-acid battery is unable to provide as strong starting current as a fully charged battery.


Best Group YTX9-BS Battery Equivalents and Replacements

chrome ytx9 bs pro w150pxYTX9-BS batteries feature physical dimensions of (L x W x H) 5.875 x 3.4375 x 4.125 inches (150 x 87 x 105 mm) and are used as starting batteries for small to medium-sized motorcycles, ATVs, riding lawn mowers, power generators, and other vehicles and appliances.

Lead-acid YTX9-BS batteries feature 10h capacity in 6-10 Ah range and are able to provide 120-180 CCA Amps. Also, they weigh 6-9 pounds, depending on the model.

While wet/flooded lead-acid YTX9-BS batteries are being phased out in favor of AGM and Gel-Cell spill-proof maintenance-free batteries, lithium YTX9-BS batteries are becoming increasingly more present on the market.

Lithium YTX9-BS batteries typical weight is in the 2-3 pounds range and they are able to provide 150-300 Amps for short periods of time, allowing them to easily crank/start gas and even diesel engines commonly found in small to medium motorcycles, ATVs and other Powersport vehicles and power generators.

The following cross-reference chart lists some of the most popular YTX9-BS batteries with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Banshee DLFP9-BS Lithium Battery 8 150 (Lithium) 2.3 lbs; 1.04 kg
Chrome YTX9-BS iGel Battery 6 180 6.61 lbs; 3.0 kg
Chrome YTX9-BS Pirate Bay Battery 8 120 6.61 lbs; 3.0 kg
Deka Sports Power ETX-9 8 120 7 lbs; 3.17 kg
Energizer TX9 AGM Battery 8 120 6.75 lbs; 3.06 kg
EverLast CTX9-BS Battery 8 135 7 lbs; 3.17 kg
ExpertPower ETX9-BS Battery 9 180 6.04 lbs; 2.73 kg
Mighty Max YTX9-BS Battery 8 135 6.72 lbs; 3.05 kg
MMG YTX9-BS Lithium Ion 5 300 (Lithium) 2 lbs; 0.91 kg
MotoBatt MBTX9U Battery 10.5 - 8 lbs; 3.62 kg
PowerStar YTX9-BS Battery 8 - 9 lbs; 4.08 kg
Power-Sonic PTX9-BS Battery 8 120 7 lbs; 3.17 kg
SigmasTek STX9-BS Battery 8 120 6.19 lbs; 2.80 kg
UpStart UB-YTX9-BS Battery 8 - 6.5 lbs; 2.95 kg
VMAX TANKS XCA20R9 Battery 9 120 7 lbs; 3.17 kg
Weize YTX9-BS Battery 8 135 6.11 lbs; 2.77 kg
Yuasa YUAM329BS YTX9-BS Battery 8 135 7.4 lbs; 3.35 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

expertpower ytx9 w150pxFor smaller lawn mowers that feature electric start of their internal combustion engines, AGM and Gel-Cell YTX9-BS batteries are recommended models - they are reliable and durable batteries that come at rather an acceptable price.

Lithium YTX9-BS batteries may lead to some weight savings and they can offer even stronger starting currents, but such advantages are not of great importance for lawn mowers.


Best Group YTX5L-BS Battery Equivalents and Replacements

chrome ytx5l pirate bay w150pxYTX5L-BS batteries are some of the smallest cranking/starting batteries commonly found in smaller motorcycles, power generators, entry-level ATVs, smaller outboard marine motors, etc.

Their physical dimensions are (L x W x H) 4.4375 x 2.75 x 4.125 inches (113 x 70 x 105 mm) and they are most commonly lead-acid batteries, although ultralight lithium batteries are slowly appearing in this battery size, too.

Despite their compact size, YTX5L-BS batteries are able to provide 70-130 CCA Amps, although there are manufacturers that claim even more CCA Amps.

The typical weight of AGM and Gel-Cell YTX5L-BS batteries is 3.5-4.5 pounds, while lithium YTX5L-BS batteries weigh just 1.0-1.2 pounds.

The following cross-reference chart lists some of the most popular YTX5L-BS batteries with their most important features and specifications:

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
Chrome YTX5L-BS 4 70 4 lbs; 1.82 kg
Chrome YTX5L-BS iGel 4 70 4.05 lbs; 1.84 kg
Chrome YTX5L-BS Pirate Bay 4 70 3.7 lbs; 1.68 kg
Energizer TX5L 4 70 3.92 lbs; 1.78 kg
Everlast CTX5L-BS 4 80 -
Mighty Max YTX5L-BS 4 65 3.62 lbs; 1.64 kg
MMG YTX5L-BS Gel 5 (20h) 80 4 lbs; 1.82 kg
MMG YTX5L-BS 1.67 120 (Lithium) 1.07 lbs; 0.49 kg
Neptune YTX5L-BS 5 (20h) 70 3.7 lbs; 1.68 kg
PowerStar PS5L-BS 4 145 4.5 lbs; 2.04 kg
SigmasTek ST5L-BS 4 80 4.14 lbs; 1.86 kg
Yuasa YTX5L-BS 4 80 4.2 lbs; 1.90 kg
Weize YTX5L-BS 4 125 3.38 lbs; 1.53 kg

Note: Amazon links ("Model" column) open in the new windows, feel free to check them for the most up-to-date offers and prices.

weize ytx5l w150pxLead-acid YTX5L-BS batteries are maintenance-free, spill-proof batteries that are very resistant to vibrations and mechanical impacts and can last a long time when protected from overcharging and summer heat.

When being disconnected from the vehicle, AGM and Gel-Cell YTX5L-BS batteries should be charged with smart battery chargers with dedicated AGM/Gel-Cell charging modes with charging current in the 0.5-1.0 Amps range.

Also, such battery chargers after recharging the battery automatically switch themselves into the maintenance mode, keeping the battery fully charged over a longer period of time - highly recommended when wintering the vehicles and appliances that use YTX5L-BS batteries.


Few Final Words

zero turn riding lawn mower w300px

When looking for a new lawn mower replacement battery, be sure to match the old one regarding battery type/chemistry, size, terminal orientation, and terminal type.

Both capacity and CCA rating of the new battery should be the same or better than the capacity and CCA rating of the old battery.

When wintering your lawn mower, check its Owner's Guide regarding battery maintenance - if allowed by the lawn mower manufacturer, disconnect the battery and keep it charged using a smart battery charger/maintainer.

During summer heat, keep the lawn mower in shade or preferably in the air-conditioned garage/storage room.

Note: internal combustion engines should be operated only in the open, not in garages, storage sheds, or similar, regardless of how good ventilation is - internal combustion engines produce colorless and tasteless Carbon Monoxide (CO) which is a very dangerous gas for humans and animals.

Also, these batteries often look like toys, but they pack quite a strong punch!

Whatever You do, stay safe!