Can these batteries start an engine?

No. They are deep-cycle batteries rated at 50A max discharge and are not designed for engine starting. Use them for house, trolling motor, solar or backup loads instead.

How many can I connect together?

Up to 16 batteries in series and parallel combinations. Connect only batteries of the same brand, model, capacity and BMS parameters, bought at a similar time.

How does cold weather affect charging?

The BMS stops charging below 14°F and stops discharging below 5°F. The cells are rated to operate from -4°F to 140°F, but charging in freezing conditions is blocked.

How long will they last?

The rating is 4,000 to 15,000 deep cycles with over 80% depth of discharge remaining after 4,000 cycles, and a stated 10-year lifetime. Real results depend on depth of discharge, temperature and charging habits.

What terminals do they use?

T14 standard terminals, which accept common ring lugs and cable ends for RV, boat, solar and storage wiring.

Do they replace a lead-acid battery directly?

Yes for deep-cycle house and storage use, at about a quarter of the weight with higher usable capacity. Check that your charger has a lithium LiFePO4 profile and that your loads stay under 50A.

Where is the 2 Pack 12V 100Ah LiFePO4 Battery cheapest?

At Walmart, for $387.41, as of our latest check.

Unbranded

2 Pack 12V 100Ah LiFePO4 Battery

Best price now

$387.41at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

Unbranded

2 Pack 12V 100Ah LiFePO4 Battery

Best price now

$387.41at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $387.41 at Walmart on Nov 11.

Our take on the 2 Pack 12V 100Ah LiFePO4 Battery

This is a pair of 12.8V 100Ah LiFePO4 deep-cycle batteries built with Grade-A cells and a built-in BMS. Each weighs about 20.5 lbs, roughly a quarter of a comparable lead-acid battery, and is rated for 4,000 to 15,000 cycles with over 80% depth of discharge after 4,000. Low-temperature protection cuts charging below 14°F and discharging below 5°F, and T14 terminals allow series and parallel banks of up to 16 batteries. They suit RV, trolling motor, solar and backup power use, not engine starting, and compete with branded 100Ah lithiums on cycle life and cold-weather protection rather than on name recognition.

Best forRV and camper house battery banksTrolling motor and boat powerOff-grid solar and home backup storageReplacing heavy lead-acid deep-cycle batteries

Pros

About 20.5 lbs each, roughly a quarter of lead-acid weight
Rated 4,000 to 15,000 cycles at over 80% depth of discharge
Built-in BMS guards overcharge, overcurrent, over-discharge, shorts and heat
Low-temperature cutoff for charging and discharging
Series and parallel banks up to 16 batteries
Standard T14 terminals fit common lugs and cables

Cons

Not for engine starting
Low-temp cutoff stops charging below 14°F, so cold-weather charging is limited
50A max charge and discharge current limits high-draw loads
Must be paired with same-brand, same-model batteries bought around the same time
Unbranded, so warranty and support are unclear

2 Pack 12V 100Ah LiFePO4 Battery prices at every store

WalmartNew
In stockSold by JLRHReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$387.41Free shippingChecked Nov 11
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About the 2 Pack 12V 100Ah LiFePO4 Battery

This set includes two 12.8V (12V) 100Ah LiFePO4 deep cycle batteries. Each is built with Grade-A cells and is rated for 4,000 to 15,000 deep cycles, with over 80% DOD after 4,000 cycles. Each battery has a 10-year lifetime.

Each battery weighs 20.5 lbs, about 1/4 the weight of a typical lead-acid battery, with 2 to 3 times the energy density. It can replace a lead-acid battery, but it is not for engine starting.

A built-in battery management system (BMS) protects against overcharge, overcurrent, over-discharge, short circuits and high temperatures. It also keeps the cells balanced. The battery stops discharging below 5°F and stops charging below 14°F.

Quantity: 2 batteries
Chemistry: Lithium iron phosphate (LiFePO4)
Voltage: 12.8V (12V)
Capacity: 100Ah each
Cycle life: 4,000 to 15,000 deep cycles; over 80% DOD after 4,000 cycles
Lifetime: 10 years
Max current: 50A charge/discharge
Weight: 20.5 lbs each
Terminal: T14
Operating temp: -4°F to 140°F
Cold cutoff: Stops discharging below 5°F; stops charging below 14°F
Protection: Built-in BMS: overcharge, overcurrent, over-discharge, short circuit, high temperature
Configurations: Series and parallel, up to 16 batteries
Uses: RVs, boats, trolling motors, solar systems, off-grid home energy storage
Note: Not for engine starting

Questions and answers

Can these batteries start an engine?: No. They are deep-cycle batteries rated at 50A max discharge and are not designed for engine starting. Use them for house, trolling motor, solar or backup loads instead.
How many can I connect together?: Up to 16 batteries in series and parallel combinations. Connect only batteries of the same brand, model, capacity and BMS parameters, bought at a similar time.
How does cold weather affect charging?: The BMS stops charging below 14°F and stops discharging below 5°F. The cells are rated to operate from -4°F to 140°F, but charging in freezing conditions is blocked.
How long will they last?: The rating is 4,000 to 15,000 deep cycles with over 80% depth of discharge remaining after 4,000 cycles, and a stated 10-year lifetime. Real results depend on depth of discharge, temperature and charging habits.
What terminals do they use?: T14 standard terminals, which accept common ring lugs and cable ends for RV, boat, solar and storage wiring.
Do they replace a lead-acid battery directly?: Yes for deep-cycle house and storage use, at about a quarter of the weight with higher usable capacity. Check that your charger has a lithium LiFePO4 profile and that your loads stay under 50A.
Where is the 2 Pack 12V 100Ah LiFePO4 Battery cheapest?: At Walmart, for $387.41, as of our latest check.