Buying guide · 10 min read · Updated October 2, 2026

5 Best Group 31 Lithium RV Battery in 2026: A Practical RV Guide

Group 31 lithium RV battery picks compared on 100Ah to 165Ah capacity, self heating, low temperature cutoffs, and weight versus lead acid.

By Bowen HigginsRV Editor at RV Gear Lab5 products comparedSpec-sheet researched

Group 31 is the biggest common RV battery case, about 13 inches long, so lithium here can reach 165Ah in one box. The tradeoffs are cold handling, because a self heating model can charge in freezing weather while the rest stop, and weight, with 22 to 24 lb versus roughly a third of lead acid. These five were compared on capacity, cold behavior and price per battery.

RV Gear Lab field notes

The Rig Fit Check

Start with the job: Litime 12V 165Ah LiFePO4 Battery leads this shortlist for cold weather and boondocking. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks: The first details to compare are 12V 165Ah LiFePO4, 12V 100Ah LiFePO4. Confirm the exact model and included components before ordering.
Trade-off to plan for: Costs $177.60 more than the 100Ah Litime

Before you buy

What Matters Before You Choose a Group 31 Lithium RV Battery

Key buying criteria so you get the right fit the first time.

01
Watt hours across sizes
A 165Ah battery holds about 2100Wh against 1280Wh for 100Ah, so one large battery can replace two small ones. That also saves wiring and a BMS. Multiply amp hours by 12.8 to compare.
02
Self heating vs low temp cutoff
Standard LiFePO4 stops charging near 32F to protect its cells. Self heating warms the cells so charging continues. Check for heating or a stated cutoff threshold.
03
Group 31 dimensions
Group 31 is about 13 inches long, and Litime lists 13 x 6.77 x 9.08 while GRNOE lists 12.9 x 6.7 x 8.6. A half inch matters in a tray. Measure first.
04
BMS rating
A 100A BMS limits continuous current, which matters if you run an inverter. Most listed here are 100A. Check the continuous discharge number.
05
Weight versus lead acid
Lithium Group 31 weighs 22 to 24 lb, roughly a third of lead acid. That matters for tongue weight and handling. Check the listed weight.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 5 best group 31 lithium rv battery, explained

Best Overall · 1 of 5

Litime 12V 165Ah LiFePO4 Battery

12V 165Ah LiFePO4
Self heating, 2 modes
172.3Wh/L energy density

Check price on Amazon

Best for: Cold weather and boondocking

Our take

Pick this if you camp in cold weather.

Why it made the shortlist

The Litime 12V 165Ah is a Group 31 LiFePO4 with self heating in two modes (regular and energy efficient) and 172.3Wh/L energy density. It also adds Bluetooth password protection so nobody else can pair with your battery.

What works

Self heating allows charging in freezing weather
165Ah holds about 2100Wh in one case
Bluetooth password blocks others from pairing

Watch out for

Costs $177.60 more than the 100Ah Litime
Heating draws some of its own stored energy

Check price on Amazon

Best Overall Value · 2 of 5

Litime 12V 100Ah LiFePO4 Battery

12V 100Ah LiFePO4
22.16 lb, 13 in long
20+ BMS protections

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Best for: Known brand drop in with clear dimensions

Our take

At $302.39 it costs $50.40 more than the Power Queen at $251.99 and $137.44 more than a single GRNOE battery at $164.95.

Why it made the shortlist

The Litime 100Ah Group 31 measures 13 x 6.77 x 9.08 inches at 22.16 lb, about a third of a lead acid battery. It has a 20 plus protection BMS and automotive grade cells.

Pick this if you want a known brand with listed dimensions.

What works

Listed weight and dimensions make fitting simple
20 plus BMS safeguards include overcharge protection
Automotive grade cells for long life

Watch out for

Costs $50.40 more than the Power Queen
No self heating for freezing charge

Check price on Amazon

Best Value Single · 3 of 5

Power Queen 12V 100Ah Group 31 LiFePO4 Lithium Battery for RV

12V 100Ah LiFePO4
100A BMS
24 lb Group 31

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Best for: Buyers comparing capacity, compatibility, included components and storage needs

Our take

At $251.99 it costs $50.40 less than the Litime 100Ah and is $82.00 more than the Balanergy at $169.99.

Why it made the shortlist

The Power Queen 12V 100Ah Group 31 has a 100A BMS with overcharge, over discharge and short circuit protection, and weighs just 24 lb. It uses Grade A cells.

Pick this if you want a mid priced single with a clear BMS rating.

What works

100A BMS covers overcharge and short circuit
About a third of lead acid weight
Cheaper than the Litime with similar capacity

Watch out for

Heavier than the Litime by about 2 lb
No self heating for charging in freezing weather

Check price on Amazon

Best for Two Battery Bank · 4 of 5

2-Pack 12V 100Ah LiFePO4 Lithium Battery Group 31 Built-in 100A BMS

2 x 12V 100Ah LiFePO4
100A BMS, low temp cutoff
22.48 lb each

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Best for: 200Ah bank on a tight budget

Our take

At $329.90 for two it works out to $164.95 each, which is $87.04 less per battery than the Power Queen 100Ah.

Why it made the shortlist

The GRNOE set is two 12V 100Ah Group 31 LiFePO4 batteries with a 100A BMS and low temperature protection. Each measures 12.9 x 6.7 x 8.6 inches and weighs 22.48 lb, and they ship one battery per box.

What works

Low temperature cutoff protects the cells
Listed dimensions and weight help planning

Watch out for

Ships as separate boxes per battery
Brand is less established than Litime

Check price on Amazon

Best Budget · 5 of 5

12V 100Ah LiFePO4 Lithium Battery Group 31 Low-Temp Protection Built-in 100A BMS

12V 100Ah LiFePO4
Cuts off discharge below -4F
100A BMS, A+ cells

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Best for: Cheapest single Group 31 lithium

Our take

At $169.99 it is $82.00 less than the Power Queen 100Ah and $5.04 more than a single GRNOE battery at $164.95.

Why it made the shortlist

The Balanergy 12V 100Ah Group 31 lists A plus cells, a 100A BMS with temperature control and low temperature protection that cuts discharge below -4F. It is claimed up to 15000 cycles.

Pick this if you want one battery at the lowest price.

What works

Stated -4F discharge cutoff is clear
100A BMS with temperature control and protection

Watch out for

15000 cycle claim is unverified by the listing
Charging below freezing is not detailed

Check price on Amazon

Methodology

How We Built This Shortlist

Each pick was assessed across 4 criteria weighted for real-world use.

Capacity and energy

We compared amp hours and converted to watt hours, since 165Ah holds about 2100Wh.

Cold weather behavior

We looked for self heating, low temperature cutoffs and stated thresholds.

Weight and fit

We checked listed weight near 22 to 24 lb and dimensions near 13 inches.

Price per battery

We divided pack prices so singles and pairs compare fairly.

Decision guide

Match a Group 31 Lithium RV Battery to Your RV

By Capacity Need

Your situation	Recommended pick	Why
Maximum energy in one case	Litime 165Ah Heated	165Ah, about 2100Wh
Standard 100Ah swap, known brand	Litime 100Ah	Listed size and weight
Standard 100Ah, mid price	Power Queen 100Ah	$251.99
200Ah bank, lowest cost	GRNOE 2-Pack	$164.95 each

By Budget

Budget	Recommended pick
$160 to $260	Balanergy 100Ah or Power Queen 100Ah
$300 to $330	Litime 100Ah or GRNOE 2-Pack
$470 to $480	Litime 165Ah Heated

Heated vs Standard

Self heating

Charges in freezing weather by warming its own cells. Only the Litime 165Ah Heated offers this here.

Standard

Stops charging near freezing, but costs far less. Litime 100Ah, Power Queen 100Ah, GRNOE 2-Pack and Balanergy 100Ah are standard.

Most buyers should default to standard unless winter charging is a real need.

By Budget

Best pick	Recommended pick
Under $200	Balanergy 100Ah
Around $250	Power Queen 100Ah
Around $300	Litime 100Ah
Around $480 for heated	Litime 165Ah Heated

For Winter Camping Specifically

Look for

Self heating or an explicit low temperature charge cutoff, plus a listed discharge limit.

In this comparison

The Litime 165Ah Heated heats itself, and the Balanergy 100Ah states a -4F discharge cutoff, but only the Litime can charge in a freeze.

When to Spend More

Spend more if

Spend more on the Litime 165Ah Heated at $479.99 for winter use, since a standard battery stops charging in a freeze.

Save if

Save with the Balanergy 100Ah at $169.99 or the GRNOE 2-Pack at $329.90 if you camp in mild weather.

FAQ

Before You Bring One Home

Is Group 31 too big for my RV?

Measure the tray first. Group 31 is about 13 inches long and 9 inches tall.

Do I need self heating?

Only if you charge below freezing. Otherwise a standard battery is fine.

Can I wire two in parallel?

Yes, matched batteries can be paralleled. The GRNOE and Litime packs are sold for that.

Is lithium worth it over lead acid?

For house power, yes, because most of the rating is usable and weight drops about two thirds.

Bottom line

The short version

Browse more group 31 lithium rv battery on Amazon →

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

5 Best Group 31 Lithium RV Battery in 2026: A Practical RV Guide

Our top picks

The Rig Fit Check

What Matters Before You Choose a Group 31 Lithium RV Battery

Watt hours across sizes

Self heating vs low temp cutoff

Group 31 dimensions

BMS rating

Weight versus lead acid

Why You Can Trust RV Gear Lab

The 5 best group 31 lithium rv battery, explained

Litime 12V 165Ah LiFePO4 Battery

Litime 12V 100Ah LiFePO4 Battery

Power Queen 12V 100Ah Group 31 LiFePO4 Lithium Battery for RV

2-Pack 12V 100Ah LiFePO4 Lithium Battery Group 31 Built-in 100A BMS

12V 100Ah LiFePO4 Lithium Battery Group 31 Low-Temp Protection Built-in 100A BMS

How We Built This Shortlist

Capacity and energy

Cold weather behavior

Weight and fit

Price per battery

Match a Group 31 Lithium RV Battery to Your RV

By Capacity Need

By Budget

Heated vs Standard

By Budget

For Winter Camping Specifically

When to Spend More

Before You Bring One Home

Is Group 31 too big for my RV?

Do I need self heating?

Can I wire two in parallel?

Is lithium worth it over lead acid?

The short version

Bowen Higgins

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