Battery Equivalents and Replacements

Lead-Acid and Lithium YTX12-BS, BTX12-BS, ETX12, CTX12-BS, STX12-BS, PTX12-BS Battery Equivalents, and Cross Reference Charts

YTX12-BS is a very popular Powersports and motorcycle battery, often used in ATVs, smaller boats, snowmobiles, motorcycles, power generators, lawn tractors, and similar applications as starting battery for small gas and even diesel internal combustion engines.

YTX12-BS is the most common label used for batteries of this size, but its label also differs among the manufacturers. When looking for a new one, pay attention to details, since there are similarly labeled batteries with different dimensions, terminal orientation, specifications, and other important details.

Updated: October 20, 2023.

chrome battery ytx12 bs

The most common label for a battery of this size is YTX12-BS, with other similar battery labels being used, like BTX12-BS, CTX12-BS, STX12-BS, PTX12-BS, ETX-12, etc.

YTX12-BS Battery Dimensions and Features

The physical dimensions of the YTX12-BS battery are (L x W x H) 5.875 x 3.5 x 5.125 inches (150 x 88 x 130 mm), with a positive terminal on the left and a negative terminal on the right side of the battery when observed from the front.

Note: some models come with terminals on both sides, which may be very important for applications where battery wires are too short for '+/-' battery terminals.

The following cross reference chart lists the top 5 most popular Powersports battery models and their most popular brands, YTX12-BS battery included:

Battery
Model
YTX9-BS
10h Cap./CCA
YTX12-BS
10h Cap./CCA
YTX14AH-BS
10h Cap./CCA
YTX14-BS
10h Cap./CCA
YTX20L-BS
10h Cap./CCA
Dimensions
L x W x H
(inch/mm)
5.875 x 3.4375 x 4.125
150 x 87 x 105 
5.875 x 3.5 x 5.125
150 x 88 x 130 
5.25 x 3.5 x 6.5625
134 x 89 x 166 
5.875 x 3.4375 x 5.75
150 x 87 x 146 
6.875 x 3.4375 x 6.125
175 x 87 x 155 
Chrome YTX9-BS
6/180
YTX12-BS
10/180
YTX14AH-BS
12/210
YTX14-BS
12/200
YTX20L-BS
18/270
Deka ETX-9
8/120
ETX-12
10/180
- ETX-14 ETX20L
18/310
EverLast CTX9-BS
8/135
CTX12-BS
10/???
CTX14AHL-BS
12/190
CTX14-BS
12/190
CTX20L-BS
14/220
ExpertPower YTX9-BS
9/180
YTX12-BS
12/210
- YTX14-BS
14/220
YTX20L-BS
20/330
Mighty Max YTX9-BS
8/135
YTX12-BS
10/180
YTX14AH-BS
12/210
YTX14-BS
12/200
YTX20L-BS
18/270
MotoBatt MBTX9U MBTX12U - MBYZ16H MBTX20U
PowerStar YTX9-BS
8/???
YTX-12BS
10/180
YTX14AH-BS
12/???
YTX14-BS
12/205
YTX20L-BS
18/220
Power-Sonic PTX9-BS
8/120
PTX12-BS
10/180
PTX14AH-BS
12/200
PTX14-BS
12/200
PTX20L-BS
18/250
SigmasTek STX9-BS
8/120
STX12-BS
10/180
STX14AH-BS
14/???
STX14-BS
12/200
STX20L-BS
19/270
VMAX XCA120R9
9 (20h)/120
XCA160R12
12 (20h)/160
- XCA200R14
14 (20h)/200
-
Weize YTX9-BS
8/135
YTX12-BS
10/210
YTX14AH-BS
12/235
YTX14-BS
12/235
YTX20L-BS
18/200
Yuasa YTX9-BS
8/135
YTX12-BS
10/180
YTX14AH-BS
12/210
YTX14-BS
12/200
YTX20L-BS
18/270
Battery
Model
YTX12-BS
10h Cap. / CCA
YTX14-BS
10h Cap. / CCA
YTX20L-BS
10h Cap. / CCA
Dimensions
L x W x H
(inch/mm)
5.875 x 3.5 x 5.125
150 x 88 x 130
5.875 x 3.4375 x 5.75
150 x 87 x 146
6.875 x 3.4375 x 6.125
175 x 87 x 155
Chrome YTX12-BS
10/180
YTX14-BS
12/200
YTX20L-BS
18/270
Deka ETX-12
10/180
ETX-14 ETX20L
18/310
EverLast CTX12-BS
10/???
CTX14-BS
12/190
CTX20L-BS
14/220
ExpertPower YTX12-BS
12/210
YTX14-BS
14/220
YTX20L-BS
20/330
Mighty Max YTX12-BS
10/180
YTX14-BS
12/200
YTX20L-BS
18/270
MotoBatt MBTX12U MBYZ16H MBTX20U
PowerStar YTX-12BS
10/180
YTX14-BS
12/205
YTX20L-BS
18/220
Power-Sonic PTX12-BS
10/180
PTX14-BS
12/200
PTX20L-BS
18/250
SigmasTek STX12-BS
10/180
STX14-BS
12/200
STX20L-BS
19/270
VMAX XCA160R12
12 (20h)/160
XCA200R14
14 (20h)/200
-
Weize YTX12-BS
10/210
YTX14-BS
12/235
YTX20L-BS
18/200
Yuasa YTX12-BS
10/180
YTX14-BS
12/200
YTX20L-BS
18/270

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

YTX12-BS batteries are mostly AGM (rarely Gel-Cell) lead-acid batteries, with some manufacturers offering lithium batteries as well.

AGM and Gel YTX12-BS Batteries Cross Reference Chart

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

Model 10h Capacity (Ah) CCA (Amps) Weight (lbs/kg)
AJC YTX12-BS - 185 8.1 lbs; 3.67 kg
Caltric YTX12-BS 10 175 9 lbs; 4.01 kg
Casil YTX12-BS 10 180 7.1 lbs; 3.22 kg
Chrome YTX12-BS AGM 10 180 7.5 lbs; 3.39 kg
Chrome YTX12-BS iGel 10 180 7.51 lbs; 3.40 kg
Chrome Pirate YTX12-BS 10 180 8 lbs; 3.83 kg
Chrome Zipp YTX12-BS 10 180 7.5 lbs; 3.39 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
Interstate YTX12-BS 10 180 10 lbs; 4.53 kg
Mighty Max YTX12-BS 10 180 7.26 lbs; 3.29 kg
Mighty Max YTX12-BS Gel 10 180 8.4 lbs; 3.80 kg
Neptune YTX12-BS 12 180 8.5 lbs; 3.85 kg
PowerStar PS12-BS 10 180 9 lbs; 4.1 kg
SigmasTek STX12-BS 10 180 8.06 lbs; 3.65 kg
Uplus YTX12-BS 10 180 8.5 lbs; 3.85 kg
UpStart YTX12-BS 10 - -
Weize YTX12-BS 10 210 7.06 lbs; 3.2 kg
Yuasa YTX12-BS 10 180 9.2 lbs; 4.18 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.

AGM and Gel-cell YX12-BS are sealed, spill-proof ('BS' - 'Battery Sealed'), maintenance-free batteries that may operate in any position except upside-down.

Note: some YTX12-BS models may even be positioned upside-down, but these models are mostly lithium YTX12 batteries.

Absorbent Glass Mat (AGM) and Gel-cell Sealed Lead-Acid (SLA) batteries feature 8-10 Ah 10h nominal capacity and 180-210 CCA Amps, weighing between 7 and 10 pounds.

yuasa ytx12 bs

These lead-acid batteries are kept charged with vehicle onboard chargers - alternators powered by an internal combustion engine.

When the lead-acid batteries are charged outside of the vehicles, they should be charged using smart lead-acid battery chargers that feature several charging modes, including analysis, desulfation, and other charging modes required for proper charging of lead-acid batteries.

Lithium YTX12 batteries feature a Battery Management System (BMS) that monitors and protects the lithium battery, charging it with a 'common' charging system found on most motorcycles, ATVs, and similar vehicles.

However, when lithium YTX12 batteries are charged outside of the vehicles, they should be charged ONLY only lithium battery chargers or intelligent lead-acid battery chargers that feature 'lithium battery charging modes.'

Note: when the AGM battery charger enters desulphation mode, it sends energy spikes into the battery to reduce the amount of lead sulfate on its plates. These spikes may damage lithium batteries.

Lead-acid YTX12-BS batteries are cheaper than lithium ones.

Lithium YTX12 Motorsport Batteries

Lithium YTX12 batteries are not as common as AGM/Gel batteries, but they are gaining in popularity. These batteries are much lighter (2-3x) than lead-acid batteries, offering the same or even better performances.

Also, lithium batteries often cost much more, at least initially, than lead-acid batteries.

antigravity ag atx 12 hd rs

The following cross-reference chart lists some of the most popular lithium YTX12 battery models:

Model Actual Capacity (Ah)
Cranking Amps Weight
AMPXELL AMX12-ST080B 8 480 3.2 lbs; 1.45 kg
Anti-Gravity Batteries AG-ATX-12-HD-RS Battery 8 480 3 lbs; 1.36 kg
Banshee 12-BS 10 330 3.45 lbs; 1.57 kg
Battery Tender BTL12A270CW Battery 4.5 270 2.54; 1.15 kg
MaxLithium YTX12-BS 8 480 2.85 lbs; 1.29 kg
Mighty Max YTX12-BS Lithium Battery ~3.5 250 -
MMG YTX12-BS Lithium Battery ~4 280 2 lbs; 0.91 kg
Sdulibitiy YTX12-BS Lithium Battery 4 400 2.79 lbs; 1.26 kg
Shorai LFX18A1-BS12 Lithium Battery 6 270 2.3 lbs; 1.04 kg
TPE DLF12-BS Lithium Battery 8.5 580 3.1 lbs; 1.40 kg

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

Here are a few more notes about lithium YTX12 batteries:

  • 'Restart Technology': Battery Management System (BMS) monitors the remaining battery charge, and if the voltage drops below a certain level due to some parasite load, BMS shuts off the battery. To start the engine, the user has to 'restart' the battery - although not fully charged, batteries with the Restart option usually have more than enough charge to crank the engine successfully.
  • 'Battery Display': if present, the battery display provides the user with the most important information about the battery, like voltage and remaining charge.
  • Actual Capacity vs. Equivalent Capacity: actual capacity is the capacity of the lithium battery in Ah, usually measured at 1C. Equivalent capacity compares lithium battery performances with the 'equivalent' lead-acid battery performances. For example, some lithium batteries with an 8 Ah actual capacity feature 15-18Ah equivalent capacity - that means that they are able to provide cranking Amps just like a 15-18 Ah lead-acid battery, despite having 'only' 8 Ah actual capacity.
  • CCA ratings for lithium batteries are often overrated when compared with lead-acid batteries. Lithium batteries are not good low-temperature performers, and many brands provide their starting Amps for higher temperatures, for example, 32°F/0°C, and label it as CCA and not CA/MCA. Nonetheless, at room temperatures, lithium starting batteries usually can provide more Amps than lead-acid batteries.

Of course, there are other details that differ between lead-acid and lithium batteries, but these are perhaps the most important.

Lithium YTX12-BS batteries cost slightly more than lead-acid YTX12-BS batteries.

As one can see, lithium YTX12 batteries cost more than AGM YTX12 batteries, but they are 2-3x lighter, they often can provide more current (2-2.5x), have a very low self-discharge rate, etc.

Note: lithium YTX12 batteries are safe batteries; just be sure NOT to charge them outside of the vehicle with the lead-acid battery charger that features desulfation mode - proper battery charger must have lithium battery charging mode.

How to Charge a YTX12-BS Battery?

YTX12-BS batteries should be charged by the vehicles' chargers when the vehicle is used.

If the lead-acid YTX12-BS batteries are charged outside of the vehicle, one should use an intelligent lead-acid battery charger that analyzes the battery first and only then charges it according to the battery condition.

When the battery is fully charged, the battery charger should switch into maintenance mode and keep the battery charged constantly.

While 10Ah starting lead-acid batteries can be quickly recharged, it is recommended to use a 1-1.5A charging current, especially if you charge them regularly.

For example, you have a YTX12-BS battery as a starting battery for the stored power generator and you want your battery to be in a top condition when it is needed the most.

If you, for some reason, regularly charge your lithium YTX12 battery outside of the vehicle, having a dedicated 1-2 Amps 12-volt lithium-ion battery charger is highly recommended - they are cheap, safe, and they do their job well.

Note: most YTX12 lithium batteries support stronger charging currents, but it's better to stay on the safe side as much as possible.


weize ytx12 bs

Long Story Short: Lead-acid and lithium YTX12-BS, BTX12-BS, ETX12, CTX12-BS, STX12-BS, PTX12-BS, etc. batteries are strong and reliable sources of power required to crank smaller gas and diesel engines.

While lithium LiFePO4 batteries are initially more expensive, they are lighter, usually are able to provide more Amps, and last longer if not mistreated.

Also, some models, although declared YTX12 batteries, are smaller, allowing the user to pack even more of the required/desired equipment onboard the vehicle.

Self-discharge rate at lower temperatures of AGM YTX12-BS batteries allows the user to store them for 3-4 months without charge dropping below 80% SoC.

The self-discharge rate of lithium YTX12 batteries often allows the user to store them for up to a year without adverse effects on performance.

Which one to choose, AGM or Lithium YTX12 battery? Unless you are a pro-rider or have a very important reason that requires you to shed a few pounds of weight from your vehicle, go for a good and reliable AGM YTX12-BS battery and don't look any further ...