Battery Equivalents and Replacements

Best Lithium Car Audio Battery

car battery ampsCar audio systems tend to be rather "hungry" regarding the required electricity and can drain ordinary car batteries rather fast.

To prevent any issues with the car's starting batteries, additional batteries or even battery packs are added in order to power the built-in car audio systems. As such, lithium car audio batteries have many benefits over lead-acid batteries and are becoming more and more popular.

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Car Audio/Stereo Power Requirements

blaupunkt multichannel 1500w w300pxThe power requirement of car audio/stereo varies from dozens of watts to several thousands of watts and that is a huge difference.

Small audio/multimedia devices with power up to 100 or so watts can be powered by the car's main battery as long as the battery is not discharged too low when the engine is turned off.

However, when high-end audio/stereo systems with the electric requirements of 500-5000+ Watts are mounted in the car, things become interesting ...

First of all, such systems cannot be powered by the main car's battery because if the starting battery is discharged almost fully, it will not be able to start the engine and such deep-discharge cycle use can shorten the battery's operating life significantly.

In order to power high-end car audio systems, one needs an additional battery or battery pack that will power the audio system and that can be recharged using an external battery charger or can be recharged with the additional battery charge controller built in the car, and maybe even modified original or added new alternator (powered by the car's engine).

Note: additional battery (or battery pack) is deep discharge battery not intended for cranking and thus must be isolated from the car's starting battery and engine starter. For additional information about these modifications, check your local car shop or car electrician. Modifying a car's electric system is far beyond the scope of this article.

So, check your audio system documentation, find its electric requirements, and of course, recommended fuses - wiring can be over-dimensioned, but fuses, fuses should be as recommended by the audio system manufacturer!

Depending on the power requirement, one may expect currents from 40-42 Amps (500W systems) to 400-420 Amps (5000W systems) or even more, when the systems are powered by the 12V.

Lithium vs Lead-Acid Batteries

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Lithium batteries offer many benefits when compared with lead-acid batteries, including:

- 12V lithium batteries offer a much stable output voltage, with many models having an output voltage of >12V, regardless of the battery's remaining charge, which also leads to better energy efficiency.

- lithium batteries are 2-3x lighter than lead-acid batteries. When the batteries are being discharged by stronger currents, this difference is even higher, sometimes even 4-5x.

- lithium batteries cycle well, with most models supporting 2000+ cycles down to 100% DoD, 3000+ cycles down to 80% DoD and 5000+ cycles down to 50% DoD.

- lithium batteries are spill-proof, maintenance-free batteries that can be mounted in virtually any position.

- lithium batteries may be recharged faster, with most models having maximum continuous charging current in the 0.5-1.0C range, etc.

On the other hand, lithium batteries also have few issues, including:

- lithium batteries must be recharged using dedicated lithium battery chargers, or using smart AGM battery chargers featuring dedicated lithium battery charging mode, or using battery charger controllers designed to charge lithium batteries.

Note: lithium batteries should be charged using the so-called Constant Current/Constant Voltage (CC/CV) charging algorithm if the charge controller has enough power available. Direct charging of lithium batteries using a car's alternator is not recommended for several reasons. Also, most 12V lithium batteries are deep cycle batteries unable to crank/start car engines! For short, it is good to have lithium batteries isolated by a charge controller (which can be, for example, powered by a car's alternator (modified or not, custom one or not)) and used only as deep cycle batteries.

- lithium batteries tend to be more expensive, at least initially. Since they cycle so well, in the long run, they are actually cheaper than lead-acid batteries, saving both time and money.

- lithium batteries should NOT be connected in series and/or parallel unless explicitly allowed by their manufacturers.

- lithium batteries feature built-in Battery Management Systems (BMS) that protect the batteries from unwanted events like overcharge, over-discharge, overheating, too low temperatures, overcurrent, etc. Also, good BMSs regularly balance the battery's cells, prolonging their lifetime. Without BMS, even Lithium Iron Phosphate (LiFePO4) batteries would not be safe to use.

When balancing the pros and cons of lithium batteries, it is obvious that lithium batteries are much lighter, they are unable to crank the engine, they cycle very well, initially they cost more, they require special chargers, and some of them can be connected in series/parallel.

The following comparison chart lists some of the most popular 12V lithium batteries, ranging from ~50Ah to 400+Ah.

Model Battery Type
Chemistry
Group Size
Capacity (Ah)
Weight (lbs/kg)
AIMS Power LFP12V50A Deep Cycle
LiFePO4
-
50
17.75 lbs; 8.04 kg
AIMS Power LFP12V100A Deep Cycle
LiFePO4
31
100
30.2 lbs; 13.7 kg
AIMS Power LFP12V200A Deep Cycle
LiFePO4
-
200
77 lbs; 34.9 kg
AIMS Power LFP12V50B Deep Cycle
LiFePO4
-
50
15.5 lbs; 7.0 kg
AIMS Power LFP12V100B Deep Cycle
LiFePO4
31
100
28.5 lbs; 12.9 kg
AIMS Power LFP12V200B Deep Cycle
LiFePO4
-
200
62 lbs; 28.1 kg
Ampere 12V 50Ah Plus Deep Cycle
LiFePO4
-
50
14.3 lbs; 6.5 kg
Ampere 12V 200Ah Plus Deep Cycle
LiFePO4
4D (6D)
200
52.3 lbs; 23.7 kg
Ampere 12V 300Ah Plus Deep Cycle
LiFePO4
4D (6D)
300
69 lbs; 31.3 kg
Banshee LFP-31M Deep Cycle
LiFePO4
31
100
24.2 lbs; 11 kg
Battle Born BB5012 Deep Cycle
LiFePO4
-
50
17.6 lbs; ~8.0 kg
Battle Born BB10012 Deep Cycle
LiFePO4
31
100
29 lbs; 13.2 kg
Battle Born BBGC2 Deep Cycle
LiFePO4
GC2
100
31 lbs; 14 kg
Bioenno Power BLF-12100WS Deep Cycle
LiFePO4
31
100
28.1 lbs; 12.8 kg
BtrPower 12V100Ah Deep Cycle
LiFePO4
31
100
24 lbs; 10.9 kg
BtrPower 12V200Ah Deep Cycle
LiFePO4
4D (6D)
200
47 lbs; 21.3 kg
Chins 12V50Ah Deep Cycle
LiFePO4
-
50
13.8 lbs; 6.3 kg
Chins 12V100Ah Deep Cycle
LiFePO4
31
100
23.9 lbs; 10.8 kg
Chins 12V200Ah Deep Cycle
LiFePO4
4D (6D)
200
49.4 lbs; 22.4 kg
Chins 12V300Ah Deep Cycle
LiFePO4
4D (6D)
300
67.3 lbs; 30.5 kg
Eastup 1250750 Dual Purpose
LiFePO4
-
50
15.43 lbs; ~7.0 kg
Eastup 12751000 Dual Purpose
LiFePO4
94R
75
18.5 lbs; 8.4 kg
Eco-Worthy 12V50Ah Deep Cycle
LiFePO4
-
50
11.9 lbs; 5.4 kg
Eco-Worthy 12V150Ah Deep Cycle
LiFePO4 
31
150
36.7 lbs; 16.6 kg
ExpertPower EP1250 Deep Cycle
LiFePO4
-
50
13 lbs; 5.9 kg
ExpertPower EP12100 Deep Cycle
LiFePO4
31
100
22.6 lbs; 10.3 kg
ExpertPower EP12200 Deep Cycle
LiFePO4
4D (6D)
200
48.3 lbs; 21.9 kg
GLI GLIBATT12050 Deep Cycle
LiFePO4
26
50
12 pounds; 5.5 kg
GreenLiFE GL50-50AH Deep Cycle
LiFePO4
21
50
15 lbs; 6.8 kg
GreenLiFE GL80-80AH Deep Cycle
LiFePO4
27
80
28 lbs; 12.8 kg
GreenLiFE GL100-100AH Deep Cycle
LiFePO4
31
100
31 lbs; 14 kg
GreenLiFE GL260-260AH Deep Cycle
LiFePO4
8D
260
80 lbs; 36.24 kg
JITA 12V100Ah Deep Cycle
LiFePO4
31
100
23.8 lbs; 10.8 kg
JITA 12V200Ah Deep Cycle
LiFePO4
4D (6D)
200
48.9 lbs; 22.2 kg
JITA 12V300Ah Deep Cycle
LiFePO4
4D (6D)
300
68.3 lbs; 31.0 kg
Kunmo LF-12100 Deep Cycle
LiFePO4
75
100
25.3 lbs; 11.5 kg
Lossigy 12V100Ah Deep Cycle
LiFePO4
-
100
23.8 lbs; 10.8 kg
Lossigy 12V200Ah Deep Cycle
LiFePO4
4D
200
46 lbs; 20.9 kg
Lossigy 12V300Ah Deep Cycle
LiFePO4
4D (6D)
300
72 lbs; 32.6 kg
Mighty Max ML100-12LI Deep Cycle
LiFePO4
30H
100
29.54 lbs; 13.4 kg
Pionergy 12V200Ah Deep Cycle
LiFePO4
4D (6D)
200
46.1 lbs; 20.9 kg
Pionergy 12V300Ah Deep Cycle
LiFePO4 
4D (6D)
300
71.2 lbs; 32.3 kg
Renogy RNG-BATT-LFP-12-50 Deep Cycle
LiFePO4
-
50
14.77 lbs; 6.7 kg
Renogy RBT100LFP12S-G1 Deep Cycle
LiFePO4
-
100
26 lbs; 11.8 kg
Renogy RNG-BATT-LFP-12-170 Deep Cycle
LiFePO4
-
170
46.3 lbs; 20.97 kg
Scremower 12V100Ah Deep Cycle
LiFePO4
31
100
24.3 lbs; 11 kg
Scremower 12V400Ah Deep Cycle
LiFePO4
-
400
81.4 lbs; 36.9 kg
VMAXTANKS LF27-12100 Deep Cycle
LiFePO4
27
100
25.3 lbs; 11.5 kg
VMAXTANKS LFPU1-1245 Deep Cycle
LiFePO4
U1
45
10.8 lbs; 4.9 kg
VMAXTANKS VPG12C-50Li Deep Cycle
LiFePO4
U1
50
12 lbs; 5.5 kg
Waterblade LFP 100-12.8 Deep Cycle
LiFePO4
-
100
29 lbs; 13.2 kg
Weize FPLI-12100AH Deep Cycle
LiFePO4
31
100
26.4 lbs; 12.0 kg

Note: Amazon affiliate links (the 'Model' column) open in the new windows, feel free to check them for the most up-to-date offers and prices. Also, we have really tried to verify every single bit of information in this chart and article (and in the end - our website), but things change over time without prior notice.

As one can see, 12V lithium batteries are becoming more and more popular, but this does not mean that they are all suitable to be used as car audio batteries, especially if larger battery packs are needed.

Here is the list of our top lithium car audio battery picks:

Battle Born BB12100 Deep Cycle Lithium Battery

battle born bb10012 w300px

Battle Born BB12100 Deep Cycle Lithium Battery is THE deep cycle lithium battery that sets standards for all other deep cycle lithium batteries. Such features and performances come at a certain price, but what You pay is what You get.

Battle Born BB12100 lithium battery features a nominal voltage of 12.8 volts and a nominal capacity of 100Ah.

Physical dimensions of the battery are (L x W x H) 12.75 x 6.88 x 9 inches (32.4 x 17.5 x 22.7 cm) and it weighs 29 pounds (~13.2 kg) - Battle Born BB12100 battery can easily fit in the battery compartments intended for the BCI Group 31 batteries.

 Like practically all other lithium car audio batteries, Battle Born BB12100 battery is based on the Lithium Iron Phosphate (LiFePO4) chemistry, with the advanced Battery Management System (BMS) monitoring the battery parameters like voltage, current, temperature, cells condition, and similar.

Battle Born BB12100 battery is water-resistant and sealed, but it should not be submerged (obviously). Also, it is very resistant to vibrations and mechanical impacts - just don't abuse it, and the battery will work. This battery comes with a 10-year warranty.

As a deep cycle battery, Battle Born BB12100 is able to withstand 3000-5000 cycles, depending on the depth of discharge (DoD%).

Battle Born BB12100 battery features a maximum continuous discharge current of 100 Amps (1C) and a maximum surge current of 200 Amps for 30 seconds (yes, 30 seconds). Also, any load above 200 Amps for a longer period of 0.5 seconds will cause the BMS to disconnect the battery.

The maximum charging current is 50 Amps (0.5C), allowing the user to cycle the battery every 3-4 hours.

Additionally, Battle Born BB12100 features a BMS that allows the user to connect the Battle Born BB12100 in parallel (practically almost no limit) and series (up to 4 in series) - this may change with new submodels, so check it before actually connecting the batteries.

With its output voltage of 12 or more volts, Battle Born BB12100 is able to provide 1200+ Watts for almost an hour.

If a larger capacity is required, feel free to connect more batteries in parallel, increasing the capacity, but also the maximum power.

Note: when connecting the Battle Born BB12100 batteries in series and parallel, be sure to thoroughly read the Owner's Guide - nothing special to read, but it is highly recommended to get accustomed to these (or any other) lithium batteries before actually connecting them.

Battle Born BB12100 deep cycle lithium battery comes with excellent BMS, rather long warranty, high maximum discharge current, can be recharged quickly, supports a large number of charging/discharging cycles, it is lightweight, it can be connected in series/parallel, etc.

It fully justifies its price which is not low ...

For more reviews and recommendations, feel free to check the Battle Born BB12100 Deep Cycle Lithium Battery Amazon link (link opens in the new window).


Ampere Time 12V 200Ah Plus Deep Cycle Lithium Battery

ampere time 12v 200ah plus w300px

Ampere Time 12V 200Ah Plus is a very popular Ampere Time lithium deep discharge battery - other models include 50Ah, 100Ah, and 300Ah lithium batteries.

Ampere Time 12V 200Ah Plus battery feature physical dimensions of (L x W x H) 20.5 x 9.37 x 8.54 inches (~52.1 x 23.8 x 21.7 cm) and it weighs 52.3 pounds (~23.7 kg).

Due to its weight, the Ampere Time 12V 200Ah Plus battery belongs to the BCI Group 6D, but most of such batteries are labeled as similar, but somewhat smaller BCI Group 4D - hence "4D (6D)" size value in the comparison chart.

Thanks to the built-in BMS, the Ampere Time 12V 200Ah Plus battery features a maximum continuous discharge current of 200 Amps (2400+ watts output power for almost an hour), with the maximum surge current of 400 Amps (4800+ watts) for 5 seconds.

According to the manufacturer, the Ampere Time 12V 200Ah Plus battery features a maximum charging current of 1C (200 Amps) current - personally, in order to prolong its lifetime, keep the maximum charging current up to 0.5C (100 Amps).

Depending on the Depth of Discharge, Ampere Time 12V 200Ah Plus battery supports 2000-5000 charging/discharging cycles.

A very interesting feature of its BMS is that it supports connections up to 4 batteries in parallel and up to 4 batteries in series - using 4 batteries one can make a 12V 800Ah battery pack that is able to provide 9600+ watts for almost an hour, which is more than enough even for smaller electric vehicles.

When comparing the prices of these batteries, note that this is 12V 200Ah and not the 12V 100Ah battery - it is well designed and built, rather cost-effective lithium deep discharge battery.

For more reviews and recommendations, feel free to check the Ampere Time 12V 200Ah Plus Deep Cycle Lithium Battery Amazon link (link opens in the new window).


ExpertPower EP12100 Deep Cycle Lithium Battery

expertpower ep12100 w300px

ExpertPower EP12100 Deep Cycle Lithium Battery is a very popular lithium battery featuring a very balanced design, features, performances, and - price.

ExpertPower EP12100 battery features physical dimensions of (L x W x H) 13 x 6.8 x 8.4 inches (~33 x 17.3 x 21.4 cm) and it weighs only 22.6 pounds (~10.3 kg) - it belongs to the BCI Group 31 batteries.

Its nominal voltage is 12.8 volts and its nominal capacity is 100Ah (25°C, 0.2C). The battery features a maximum continuous discharge current of 1C (100 Amps) with the maximum surge discharge current of 200 Amps for 2 seconds, making it suitable for systems up to 1200 Watts, with short surges up to 2400 Watts.

Note: some official sources claim 0.5C (50 Amps) maximum continuous discharge current and some claim 1C (100 Amps) with 1C being more often used.

ExpertPower EP12100 battery also features a maximum continuous charge current of 0.5C (50 Amps), although, in order to improve the lifetime of the battery, the charging current should be kept around 30-35 Amps (0.33C) or less.

A number of supported charging/discharging cycles depends on the battery temperature and discharge current. For example, at 20°C and 0.2C (20 Amps) discharge current, ExpertPower EP12100 battery supports:

- 2500 cycles down to 100% DOD,

- 3600 cycles down to 80% DOD,

- 7000 cycles down to 50% DOD.

Parallel and series connections - at the moment, ExpertPower doesn't say anything about connecting ExpertPower EP12100 battery in series or parallel. Only after deep digging one may found information that the ExpertPower EP12100 battery is intended for 12V and 24V battery systems and for 100Ah and larger capacities.

People use this battery in battery packs of various sizes - personally, this is a very fine battery, used and tested by many users in various real-life situations and it passed it with flying colors :)

But, ExpertPower should be more clear about making battery packs with this battery. If You are looking for a deep cycle, single lithium battery that will power car audio systems up to 600 watts (just in case), this battery is an excellent choice.

For more reviews and recommendations, feel free to check the ExpertPower EP12100 Deep Cycle Lithium Battery Amazon link (link opens in the new window).


Chins 12V 100Ah Deep Cycle Lithium Battery

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Unlike ExpertPower, the Chins company clearly states what their Cins 12V 100Ah Deep Cycle Lithium Battery is capable of - it can be connected up to 4 in series and up to 4 in parallel: 4S4P, 4S2P, 2S2P, 3S2P, etc.

This allows the user to make various battery packs ranging in voltage from 12V to 48V and in capacity from 100Ah to 400Ah.

Also, Chins manufactures several similar models, including 50Ah, 200Ah, and 300Ah with similar BMS features.

Chins 12V 100Ah battery features dimensions of 12.95 x 6.77 x 8.43 inches (~32.9 x 17.2 x 21.4 cm) and it weighs 23.9 lbs (~10.8 kg) - Chins 12V 100Ah battery belongs to the BCI Group 31 batteries.

The maximum continuous discharge current is 100A, with a surge current of 300A(!) for up to 5 seconds. The maximum continuous charge current is 50 Amps, with a standard and recommended charging current of 20 Amps.

Chins 12V 100Ah battery supports 2000+ charging/discharging cycles down to 80% DoD.

Despite certain limitations (somewhat smaller number of supported charging/discharging cycles, smaller charging current), Chins 12V 100Ah battery is well-liked by its users and proves itself rather reliable considering its price for various applications, as a single battery or as a larger battery pack.

For more reviews and recommendations, feel free to check the Chins 12V 100Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).


Eco-Worthy 12V 150Ah Deep Cycle Lithium Battery

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Eco-Worthy 12V 150Ah Deep Cycle Lithium Battery features physical dimensions of 13 x 6.9 x 8.5 inches (~33 x 17.5 x 21.6 cm) and it weighs 36.7 pounds (~16.6 kg) - Eco-Worthy 12V 150Ah battery belongs to the BCI Group 31 batteries.

Its maximum continuous discharging current is 100 Amps, with a maximum continuous charging current of 80 Amps - a single Eco-Worthy 12V 150Ah battery is suitable for systems up to 1200 watts for ~90 minutes.

Eco-Worthy 12V 150Ah battery supports 3000+ charging/discharging cycles down to 80% DoD.

The manufacturer clearly states that the Eco-Worthy 12V 150Ah battery allows connections up to 4 batteries in series, with parallel connections being unlimited.

Considering its price (note that this is a 150Ah battery and not a 100Ah battery), the Eco-Worthy 12V 150Ah battery is an excellent entry-level lithium deep cycle car audio battery, well suitable for other purposes as well.

For more reviews and recommendations, feel free to check the Eco-Worthy 12V 150Ah Deep Cycle Lithium Battery Amazon link (link opens in the new window).


Few Final Words

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Long Story Short: Deep cycle lithium batteries allow the user to have a strong battery pack to power even the strongest car audio systems without overloading the car or some other vehicle with heavy lead-acid batteries.

However, note that the size of the lithium batteries is more or less the same as the size of the lead-acid batteries of a similar capacity - some users focus almost entirely on the weight of the lithium batteries and their charging/discharging currents.

For example, if You are building a battery pack consisting of four (4) group 31 batteries, regardless if they are lithium or lead-acid batteries, You still need the same storage area - if they are placed side by side, You will need ~13 x 27.5 x 9 inches (~33 x 70 x 23 cm) - or slightly higher to help with the wiring.

Note: tampering and modifying the car's electric system should be done only by certified professionals. Whatever You do, it is your own responsibility!

 

 

 

 

 

Amazon Search:

- Lithium 100Ah LiFePO4 Battery

- Lithium 200Ah LiFePO4 Battery

- Lithium 300Ah LiFePO4 Battery

- Car Multichannel Amplifier

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