NERMAK 12V10A 12V 10Ah LiFePO4 Deep-Cycle Battery

NERMAK 12V10A is a compact 12V 10Ah LiFePO4 deep-cycle battery for lower-current devices such as fish finders, lighting, and 12V routers. Its listing describes a built-in BMS and a 10A continuous discharge rating, so it is aimed at modest loads rather than engine starting or high-draw equipment.

At a glance

Built-in BMS is described as protecting against overcharge, over-discharge, over-current, and short circuit.
The listing claims more than 2,000 cycles, but this is a manufacturer figure rather than an independently verified result.
Manufacturer-listed applications include fish finders, lighting, 12V routers, ride-on toys, small UPS units, and backup power.
The manufacturer says up to four identical batteries can be connected in series. Parallel connection is also claimed.

Price

$33.98Save 15%

Reference price: ~~$39.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

At 1.2 kg and listed dimensions of 5.94"D x 2.56"W x 3.71"H, the battery may suit space- and weight-conscious setups.
F2 terminals and the stated 10A continuous output suit compatible low-current equipment.
The maker specifies a built-in BMS and a claimed cycle life exceeding 2,000 cycles.

Cons

The stated continuous output is limited to 10A, with peak current listed as 20A for less than five seconds.
The manufacturer explicitly says this is not a starter battery, limiting its suitability for engine-starting applications.

Technical specifications

18 specifications

Identity
Brand	NERMAK
Model	12V10A
Battery type	Lithium-Phosphate

Electrical
Nominal size	12V 10Ah
Voltage	12.8 volts
Listed energy	128 watt-hours
BMS	10A BMS
Continuous discharge current	10A
Peak discharge current	20A (Duration: less than 5 seconds)
Maximum listed charging current	6A
Charging voltage	14.6±0.2V
Cycle life claim	>2000 cycle

Dimensions and installation
Dimensions listed	5.94"D x 2.56"W x 3.71"H
Weight listed	1.2 kg
Terminal	F2 Terminal

Operating conditions
Discharging temperature	-4°F to 140°F
Charging temperature	32°F to 113°F
Recommended discharge depth	80-90% depth of discharge (DOD)

What to know before buying

Use a LiFePO4-specific charger for best charging results. The listing says lead-acid chargers may work but may not fully charge the battery, and its charging-temperature range is 32°F to 113°F.

Listing details to confirm

The listing gives conflicting discharge guidance: one section says it can be discharged to 100%, while another recommends limiting depth of discharge to 80-90% to avoid BMS disconnection. It also describes 10A continuous output and a 20A peak under five seconds, but separately warns that prolonged current above 10A can damage the battery and says the maximum should not exceed 15A. Treat 10A as the continuous limit and clarify the intended use with the seller if the load approaches these limits. The listing gives the energy as 128 watt-hours in one field and calls it 128 watts in a specification paragraph. These are different units, so confirm the desired rating before relying on the latter wording.

What’s in the box

Included

1 LiFePO4 battery, 12.8V 10Ah

Who is it for?

A good fit for

Fish-finder, lighting, router, and other compatible 12V applications drawing no more than the stated continuous current.
Buyers seeking a small-format deep-cycle battery for backup or low-current projects.
Setups where the battery can be charged within its listed charging-temperature range using a suitable LiFePO4 charger.

Less suited to

Engine starting, including motorcycle starting, which the listing explicitly excludes.
Loads requiring sustained current above 10A or equipment exceeding the stated operating limits.
Buyers needing a high-capacity battery for long runtime or high-power applications.

NERMAK 12V10A 12V 10Ah LiFePO4 Deep-Cycle Battery · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 1,558 ratings

5 stars75%75%
4 stars9%9%
3 stars3%3%
2 stars2%2%
1 star11%11%

Customer feedback reports positive impressions of performance, charging, weight, and compact fit, with some customers describing faster charging or reduced weight compared with their previous battery. Battery life and value receive mixed feedback, including reports ranging from all-day use to failure after a short period. For a 10Ah battery with a listed 10A continuous limit, runtime depends on the connected load, so the favorable performance accounts should not be treated as a guarantee of endurance.

Positive themes

Customers report favorable performance, charging, weight, and fit.

Mixed feedback

Customer reports about battery life vary from all-day use to lasting only a short time.
Opinions on value for money are mixed.

Frequently asked questions

Can this battery start a motorcycle or other engine?

No. The listing explicitly says it is not a starter battery and excludes motorcycle starting.

What current can it supply?

The listed continuous discharge current is 10A. A separate specification gives 20A peak for less than five seconds, while the listing warns against prolonged current above 10A.

What charger should I use?

The manufacturer recommends a LiFePO4-specific charger. It says some lead-acid chargers may work but may not fully charge the battery.

Can multiple batteries be connected together?

The listing claims series or parallel connections are possible and specifies up to four identical batteries in series. Verify compatibility and configuration details before connecting batteries.