NERMAK 12V10A 12V 10Ah LiFePO4 Battery, 2-Pack

Pack: NERMAK 12V10A is a two-battery 12V LiFePO4 set for compatible low-current devices such as fish finders, lighting, and small UPS units. Its compact listed dimensions and claimed 10A continuous output suit modest loads, while the listing contains conflicting charging, current, and size details that are worth resolving before purchase.

At a glance

Two 12V 10Ah LiFePO4 batteries are listed in the package.
The listing claims a built-in BMS and more than 2,000 cycles.
Series or parallel connection is claimed, with up to four identical batteries in series.
The seller recommends a LiFePO4-specific charger for full charging.

Price

$62.99Save 10%

Reference price: ~~$69.99~~

Price checked: Nov 13, 2026

View offer

Pros and cons

Pros

The pair provides two batteries for compatible replacement or separate low-current applications.
The listed 1.2 kg weight and compact dimensions may help where installation space or battery weight matters.
The advertised BMS protection covers overcharge, over-discharge, over-current and short circuit.

Cons

The listing says the battery is not a starter battery and rules out sustained use above 15A.
This 10Ah capacity is not suited to applications needing substantial runtime or high current.

Technical specifications

14 specifications

Identity
Brand	NERMAK
Model	12V10A

Power and battery
Battery type	Lithium-Phosphate
Rated capacity	10 amp_hours
Voltage	12.8 volts
Listed cell count	2
Listed continuous discharge current	10A
Listed peak discharge current	20A (Duration: less than 5 seconds)
Listed charging voltage	14.6±0.2V
Listed continuous charge current	6A
Cycle life claim	>2000 cycle
Terminal	F2 Terminal

Dimensions and installation
Dimensions listed	5.94"D x 2.56"W x 3.91"H
Weight listed	1.2 kg

What to know before buying

Listing details to confirm

The listing is inconsistent about dimensions, giving 5.94 x 2.56 x 3.91 inches in one field and 5.94 x 2.56 x 3.7 inches elsewhere. It also alternates between a 10A continuous discharge rating, a 15A stated maximum, and a 20A peak for under five seconds, and gives charging guidance that differs on whether SLA chargers work. Confirm the intended charger, current limits and physical fit for your application before buying. The listing also says to limit discharge to 80–90% to avoid BMS disconnection, despite separately describing discharge up to 100%.

What’s in the box

Included

2 × 12.8V 10Ah LiFePO4 batteries

Who is it for?

A good fit for

Fish-finder, lighting, 12V router and ride-on toy owners whose equipment accepts the listed battery voltage, capacity and terminal.
Buyers replacing a compatible small backup-power battery who prioritize low listed weight.

Less suited to

Starter-battery applications, including motorcycles, go-karts, generators and lawn mowers.
Loads requiring more than 15A for extended periods, scooters above 24V 350W, trolling motors or UPS units above 1500VA/1000W.
Buyers who need a confirmed runtime, charging compatibility or a single undisputed dimensions/current specification.

NERMAK 12V10A 12V 10Ah LiFePO4 Battery, 2-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 1,150 ratings

5 stars70%70%
4 stars10%10%
3 stars4%4%
2 stars5%5%
1 star11%11%

Customer feedback is favorable about ease of installation, fit, and lighter weight than lead-acid batteries. Reports about battery life, quality, charging and capacity are mixed, including both longer-lasting charge reports and reports that a battery would not hold charge. For a small 10Ah replacement, these differences matter to reliability and usable runtime, so verify the intended load, charger and return options before relying on the batteries for backup power.

Positive themes

Customers describe installation and fit favorably.
Customers appreciate the lower weight compared with lead-acid batteries.

Mixed feedback

Reports about charge retention vary, with some customers describing longer hold time and others saying the battery would not hold charge.
Quality and charging performance receive mixed feedback.
Capacity feedback varies, including reports of more capacity than expected.

Frequently asked questions

How many batteries are included?

The explicit included-components list specifies two 12.8V 10Ah LiFePO4 batteries.

What charger should I use?

The listing recommends a LiFePO4-specific charger for full capacity. Its charger guidance also says lead-acid chargers may work, while another note warns that a fully automatic SLA charger may not fully charge the battery. Confirm compatibility with the charger manufacturer.

Can these batteries be connected together?

The listing claims series or parallel connection and up to four identical batteries in series. Confirm your system's voltage and connection requirements before combining batteries.

Is this battery suitable for a starter motor or high-current equipment?

No. The listing says it is not a starter battery and cautions against sustained current above 15A, with a separate 10A continuous rating.