How does it compare with a lead-acid battery of the same size?

It gives roughly twice the usable runtime, weighs about a fifth as much, and lasts thousands of cycles instead of a few hundred. It also charges faster with a lithium-compatible charger.

Can I connect several together?

Yes. It supports up to 4 in parallel and 4 in series, for a 51.2V 400Ah bank. Use batteries of the same age and charge state and follow the wiring guidance.

What charger does it need?

A LiFePO4 charger, such as a 14.6V 20A unit, which brings it to full in about 5 hours. A lead-acid charger will not charge it properly.

Can it run a trolling motor or inverter?

Yes, up to 100A continuous, about 1280W. Size the load so it stays within that limit.

Is it safe in rain or on a boat?

The housing is IP65 rated against dust and water jets, and the BMS protects against overcharge, over-discharge, over-current, short circuit and high temperature.

How long will it last?

Redodo rates it at over 4000 cycles at 100% depth of discharge, with a 10-year lifetime claim and a 5-year warranty.

Where is the Redodo 12V 100Ah LiFePO4 Lithium Battery cheapest?

At Redodo Power, for $242.99, as of our latest check.

What do buyers say about the Redodo 12V 100Ah LiFePO4 Lithium Battery?

Rated 4.8 out of 5 from 281 ratings. Buyers like: Customer support rep Tina was wonderful and helped with third-party hybrid regulator and charger/inverter setups; Ran a boat wide open all day and batteries still showed 13 volts after about 4 miles; Capacity tests surpass ratings, reaching up to 105Ah.

Redodo 12V 100Ah LiFePO4 Lithium Battery Price History: Lowest $242.99

What reviewers say

4.8 / 5281 ratings

Owners rate it highly, with capacity tests coming in at or above the 100Ah rating and long runs on boats holding voltage well.

What people mention

CapacityPraisedBuyers report capacity tests hitting 101 to 105Ah, above the 100Ah rating.
RuntimePraisedOwners say it runs roughly twice as long as the lead-acid battery it replaced.
WeightPraisedBuyers note it is far lighter than an equivalent lead-acid bank, which helps in boats and RVs.
MonitoringCriticisedThere is no Bluetooth or app to check state of charge or cell balance.
ChargingMixedFast charge times depend on pairing it with a suitable LiFePO4 charger.

From Redodo Power

Maintains 101 to 105 amps of continuous capacity, giving 2x the run time of lead-acid batteries
EV Grade-A cells with 4000+ cycles at 100% DOD and a 10-year lifetime
Weighs only 25 lbs, about 1/5 the weight of a 200Ah lead-acid battery with the same usable energy
Expandable up to a 51.2V 400Ah system, 20.48kWh of energy output
Fast charging: about 5 hours with a 14.6V 20A LiFePO4 charger, 50% less than lead-acid
Built-in 100A BMS protects against overcharge, over-discharge, over-current, short circuit and high temperature

Sizes: 12V 100Ah Group 31 Basic, 12V 100Ah Group 24 Basic, 12V 100Ah Low Temp - 128, 12V 100Ah Ultra-Mini BT
Materials: LiFePO4 prismatic cells; ABS housing; IP65 protection class; M8 terminals
Fit: BCI Group 31 size, L13 x W6.77 x H8.43 inch
Care: Charge method CC/CV at 14.6V; recommended charge current 20A (0.2C); charge temperature 0°C to 50°C; discharge temperature -20°C to 60°C; storage temperature -1
Guarantee: 5-year warranty on batteries (2-year on chargers) with lifetime technical support
Returns: 30-day money-back guarantee
Shipping: Free and fast delivery in 2-5 days from the US local warehouse
Packs: 1 Pack (New Look), 1 Pack (Classic Look), 2 Pack, 3 Pack, 4 Pack, 4 Pack (Classic Look), and 1 Pack + 20A Charger

About the Redodo 12V 100Ah LiFePO4 Lithium Battery

The Redodo 12V 100Ah is a lithium iron phosphate (LiFePO4) deep cycle battery with a nominal voltage of 12.8V and 1280Wh of energy. It uses EV Grade-A prismatic cells in an ABS housing with M8 terminals. The housing has an IP65 protection class. The size matches BCI Group 31.

A built-in 100A BMS protects against overcharge, over-discharge, over-current, short circuit and high temperature. The battery is rated for 4000+ cycles at 100% depth of discharge and a 10-year lifetime. With a 14.6V 20A LiFePO4 charger, charging takes about 5 hours.

Batteries can be combined in up to 4P4S to form a 51.2V 400Ah system with 20.48kWh of energy. It is suited to RVs, boats, camping and solar home systems. It is recommended for trolling motors with 30 to 70 lbs of thrust. It is not suitable as a starter battery or for golf carts.

Cell type: LiFePO4 (lithium iron phosphate), prismatic
Nominal voltage: 12.8V
Capacity: 100Ah
Energy: 1280Wh
Cycle life: 4000+ cycles at 100% DOD
BMS: Built-in 100A
Max continuous discharge: 100A
Max output power: 1280W continuous
Dimensions: 13 x 6.77 x 8.43 in (L x W x H), BCI Group 31 size
Housing: ABS
Terminals: M8
Protection class: IP65
Max expansion: 4P4S (51.2V 400Ah, 20.48kWh)

What buyers say

Buyers like

Customer support rep Tina was wonderful and helped with third-party hybrid regulator and charger/inverter setups
Ran a boat wide open all day and batteries still showed 13 volts after about 4 miles
Capacity tests surpass ratings, reaching up to 105Ah