Is this a true drop-in replacement for a Group 31 lead-acid battery?

Yes, it uses the Group 31 case size and M8 terminals, so it fits most Group 31 trays. However, you should use a lithium-compatible charger or the included one.

Can I use the included charger with other batteries?

The 12V 20A charger is designed for LiFePO4 batteries and can charge other 12V lithium packs, but check compatibility with your battery's BMS.

How long does it take to charge with the included charger?

A full charge from empty takes about 5 hours with the 20A charger, assuming 100% efficiency. Actual time may be longer.

Does it have low-temperature charging protection?

The BMS protects against overcharge and short circuit, but charging below freezing is not recommended and may not be automatically prevented.

What is the warranty?

Wattcycle offers a limited warranty; check the current terms with the seller.

What do buyers say about the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery?

Rated 4.2 out of 5 from 398 ratings.

Where can I buy the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery?

3 stores we checked sell it, including eBay, WattCycle, Walmart.

Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery

Best price now

$189.99at WattCycleChecked Nov 9

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit WattCycle

Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery

Best price now

$189.99at WattCycleChecked Nov 9

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit WattCycle

Ask our agent about this product

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Price facts

Last seen at $189.99 at WattCycle on Nov 9.
Checked at 3 stores.

Our take on the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery

The Wattcycle 12V 100Ah Pro is a Group 31 LiFePO4 battery built as a drop-in replacement for lead-acid, with a built-in BMS and a bundled 20A charger. It weighs about 23 lbs, roughly half a comparable AGM, and offers the deep-cycle life and flat discharge curve of lithium. Owners like the capacity and the included charger, but some report BMS cutoffs under heavy loads and slow charging with the supplied unit. It suits van, boat and golf cart users who want lithium benefits without a separate charger purchase.

Best forVan and camper electrical systemsBass boat trolling motor powerGolf cart upgradesSmall home backup storage

Pros

Built-in BMS with overcharge and short-circuit protection
Group 31 case fits many lead-acid trays
About 23 lbs, much lighter than equivalent AGM
Includes a 12V 20A charger
Flame-retardant ABS case

Cons

Some users report BMS shutting down under high inrush loads
20A charger is slow for a 100Ah battery
No Bluetooth or app monitoring
Cold-temperature charging limits apply

Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery prices at every store

WattCycleNew
In stock
$189.99Checked Nov 9
Visit WattCycle
WalmartNew
In stockSold by WattCycle Direct
$790.99Checked Nov 9
Visit Walmart
eBayNew
Availability unknownSold by wattcycle_us (100% positive, 13 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$199.00Free shippingChecked Nov 9
Visit eBay
eBayRefurbished
Availability unknownSold by wattcycle_global (99.6% positive, 535 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$224.87Free shippingChecked Nov 9
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Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery price history

Lowest price we've seen: $189.99 on Nov 9 at WattCycle. Tracked across 2 stores since Nov 9.

What reviewers say

4.2 / 5398 ratings

Reviewers give it 4.2 out of 5, praising its capacity and the included charger for the money. Criticisms center on BMS cutoffs with high-draw devices and the slow recharge time with the bundled charger.

What people mention

BMS performanceMixedSome owners report the BMS shutting off under heavy loads, while others find it reliable for normal use.
Charging speedCriticisedThe included 20A charger is seen as slow for a 100Ah battery, taking about 5 hours or more for a full charge.
WeightPraisedAt 23 lbs, it is much lighter than lead-acid equivalents, making installation easier.
ValuePraisedReviewers often mention the included charger and capacity as good value compared to rivals.
FitPraisedThe Group 31 footprint fits many existing trays without modification.

Specifications

Battery Capacity: 100Ah
Battery Chemistry: LiFePO4
Battery Type: LiFePO4, Lead-Acid Replacement
Battery Material: ABS (Flame Retardant Plastic)
Compatibility: Vans, Bass boats, Campers, Golf carts, Home storage
Vehicle Model Compatibility: Group 31
Terminals: M8 bolts

Questions and answers

Is this a true drop-in replacement for a Group 31 lead-acid battery?: Yes, it uses the Group 31 case size and M8 terminals, so it fits most Group 31 trays. However, you should use a lithium-compatible charger or the included one.
Can I use the included charger with other batteries?: The 12V 20A charger is designed for LiFePO4 batteries and can charge other 12V lithium packs, but check compatibility with your battery's BMS.
How long does it take to charge with the included charger?: A full charge from empty takes about 5 hours with the 20A charger, assuming 100% efficiency. Actual time may be longer.
Does it have low-temperature charging protection?: The BMS protects against overcharge and short circuit, but charging below freezing is not recommended and may not be automatically prevented.
What is the warranty?: Wattcycle offers a limited warranty; check the current terms with the seller.
Where is the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery cheapest?: At WattCycle, for $189.99, as of our latest check.
What do buyers say about the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery?: Rated 4.2 out of 5 from 398 ratings.
Where can I buy the Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery?: 3 stores we checked sell it, including eBay, WattCycle, Walmart.