What charger does this battery need?

Use a lithium iron phosphate charger; the maker recommends 14.6V at 20A, which gives about a 5-hour charge. It can also charge from a solar panel with a controller or from an alternator.

Will it fit a Group 31 battery box?

Yes. It measures 12.9 x 6.69 x 8.5 inches, which the maker says suits a BCI Group 31 box. Check your tray dimensions before ordering.

How does it compare with a lead-acid Group 31 battery?

It is about 60% lighter and needs no acid refills or watering. It also has a built-in 100A BMS for protection, which a plain lead-acid battery does not.

What can I run with it?

The maker lists RV, solar, household backup, off-grid and electric scooter or handicap use. The 100A BMS caps continuous draw, so check your load against that limit.

Does it need maintenance?

No acid refilling or regular watering. Keep it charged within the BMS limits and store it in a suitable place.

Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery

Best price now

$132.80at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery

Best price now

$132.80at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $132.80 at Walmart on Nov 9.

Our take on the Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery

The Kingboss 12.8V 100Ah is a lithium iron phosphate (LiFePO4) deep-cycle battery built to BCI Group 31 dimensions, so it drops into the same trays and boxes as a Group 31 lead-acid battery. It has a built-in 100A BMS that guards against overcharge, over-discharge, over-current, overheating and short circuits. It weighs roughly 60% less than a comparable lead-acid battery and needs no acid refills or watering. It suits RV, solar, off-grid and mobility-scooter setups where weight and maintenance matter more than the lowest upfront cost.

Best forRV and camper house batteryOff-grid solar storageElectric scooter or handicap cart powerOwners replacing a Group 31 lead-acid battery

Pros

Built-in 100A BMS protects against overcharge, over-discharge, over-current, overheating and shorts
Group 31 footprint fits standard battery boxes
About 60% lighter than comparable lead-acid
No acid refilling or regular maintenance
Charges from a lithium charger, solar panel with controller, or alternator

Cons

Needs a LiFePO4-compatible charger; a 14.6V 20A unit is recommended for a 5-hour charge
Not a drop-in for lead-acid charging profiles without a compatible charger or controller
Capacity and BMS current limits rule out very high-draw applications
Buyers must confirm Group 31 sizing before ordering

Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery prices at every store

WalmartNew
In stockSold by HIGHWAY PROMO INCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$132.80Free shippingChecked Nov 9
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About the Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery

This is a 12.8V, 100Ah lithium iron phosphate (LiFePO4) deep cycle battery in a BCI Group 31 size. It has a built-in 100A battery management system (BMS) that protects against overcharging, over-discharging, over-current, overheating and short circuits.

The battery measures 12.9 x 6.69 x 8.5 inches and fits a BCI Group 31 battery box. It is 60% lighter than comparable lead-acid batteries. It needs no acid refilling or frequent maintenance.

It can be recharged with a lithium iron phosphate battery charger, a solar panel with a controller, or an alternator. A 14.6V 20A charger is recommended and gives a fast charge in 5 hours. The battery is used in RVs, solar systems, household battery setups, off-grid systems, electric scooters and electric handicap equipment.

Voltage: 12.8V
Capacity: 100Ah
Chemistry: Lithium iron phosphate (LiFePO4)
Battery type: Deep cycle
Group size: BCI Group 31
Dimensions: 12.9 x 6.69 x 8.5 inches
BMS: Built-in 100A; protects against overcharge, over-discharge, over-current, overheating and short circuits
Charging: LiFePO4 charger, solar panel with controller, or alternator
Recommended charger: 14.6V 20A (5 hours fast charge)
Weight: 60% lighter than comparable lead-acid batteries
Uses: RV, solar, household battery, off-grid, electric scooter, electric handicap equipment

Specifications

color: AssortedSource

Questions and answers

What charger does this battery need?: Use a lithium iron phosphate charger; the maker recommends 14.6V at 20A, which gives about a 5-hour charge. It can also charge from a solar panel with a controller or from an alternator.
Will it fit a Group 31 battery box?: Yes. It measures 12.9 x 6.69 x 8.5 inches, which the maker says suits a BCI Group 31 box. Check your tray dimensions before ordering.
How does it compare with a lead-acid Group 31 battery?: It is about 60% lighter and needs no acid refills or watering. It also has a built-in 100A BMS for protection, which a plain lead-acid battery does not.
What can I run with it?: The maker lists RV, solar, household backup, off-grid and electric scooter or handicap use. The 100A BMS caps continuous draw, so check your load against that limit.
Does it need maintenance?: No acid refilling or regular watering. Keep it charged within the BMS limits and store it in a suitable place.
Where is the Kingboss 12.8V 100Ah LiFePO4 Battery Group 31 Deep Cycle Battery cheapest?: At Walmart, for $132.80, as of our latest check.