what is the internal resistance of one of these batteries?

Thank you for your question, the internal resistance is around 30-50 milliohms.

Can this be used to power a 12v winch

Thank you for your question, you need to check what is the working current of power a 12v winch, the working current of our 36Ah battery is 36A, if the current is less than or equal to 36A then you can use it.

Can 6 of these be hooked up in series? my ups has a 72v setup. i would like to use these batteries instead but can’t find specifics.

Thank you for your question, there is no substitute as our batteries can only be connected in series with a maximum of 4.

Can this be used with a Batcaddy golf cart?

Thank you for your question, yes, if you are using two or more batteries in series, it is recommended that you use a Lifepo4 charger to charge the batteries.

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12V 7Ah

Product ID: 468443395

Details

Battery Capacity
7 Amp Hours
Battery Cell Composition
Lithium Ion
Brand
NERMAK
Item Weight
2 Pounds
Number Of Cells
1
Product Dimensions
5.94"D x x

⚡8A continuous heavy-duty output

🔋2000+ cycles lifespan

🔌Built-in BMS for ultimate safety

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Description

🔋 Power smarter, last longer — never get left in the dark!

SMART SAFETY SHIELD - Integrated Battery Management System (BMS) protects against overcharge, over-discharge, short circuits, and over-current.
POWER WHEN IT COUNTS - Delivers up to 8A continuous discharge and 2C pulse for reliable, heavy-duty performance in all your devices.
VERSATILE EXPANDABLE - Connect up to 4 batteries in series or parallel for scalable power solutions tailored to your needs.
ENDURANCE THAT OUTLASTS - 2000+ recharge cycles—4x longer than lead-acid batteries, so you stay powered without the hassle.
LIGHTWEIGHT ECO FRIENDLY - Weighs just 2 lbs with zero memory effect and low self-discharge—upgrade your gear with clean, efficient energy.

The NERMAK 12V 7Ah LiFePO4 battery offers a cutting-edge lithium iron phosphate chemistry delivering 2000+ charge cycles, built-in BMS protection, and heavy-duty 8A output. Perfect for emergency lighting, solar setups, outdoor gear, and more, it’s a lightweight, eco-friendly upgrade over traditional lead-acid batteries with superior safety and longevity.

Specifications

ASIN	B0B78HTRDL
Battery Capacity	7 Amp Hours
Battery Cell Composition	Lithium Ion
Battery Type	Lithium Ion
Best Sellers Rank	#47,384 in Health & Household ( See Top 100 in Health & Household ) #86 in 12V Batteries
Brand	NERMAK
Brand Name	NERMAK
Compatible with Vehicle Type	Fish Finder, 12V Routers,Game Cameras,Radio
Customer Reviews	4.2 out of 5 stars 366 Reviews
Included Components	1*12.8V 7Ah Lifepo4 battery
Item Dimensions D x W x H	5.94"D x 2.56"W x 3.71"H
Item Weight	2 Pounds
Manufacturer	NERMAK
Manufacturer Part Number	12V 7A
Manufacturer Warranty Description	1 year
Model Number	12V7A
Number Of Cells	1
Size	12V 7Ah
Terminal	F2 Terminal
Unit Count	1.0 Count
Vehicle Service Type	Fish Finder, 12V Routers,Game Cameras,Radio
Voltage	12.8 Volts

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$72.84

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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