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 2 Pack

Product ID: 468443393

Details

Brand
NERMAK
Vehicle Service Type
Fish finder
Size
12V 7Ah-2PACK
Voltage
12.8 Volts
Battery Cell Composition
Lithium Ion
Item Weight
2.1 Pounds

⚡8A continuous discharge

🔋2000+ charge cycles

🔌Built-in BMS protection

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€ 100.64

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your adventures with unstoppable, smart energy.

EXPANDABLE ENERGY - Connect up to 4 batteries in series or parallel to scale your power needs effortlessly
SMART SAFETY SHIELD - Integrated BMS guards against overcharge, over-discharge, and short circuits for worry-free use
RAPID RECHARGE READY - Quick 4A charging and heavy-duty 8A output keep you powered and moving fast
VERSATILE POWERHOUSE - Perfect for camping, emergency lighting, ride-on toys, and more—your all-in-one energy solution
ENDURANCE THAT OUTLASTS - 2000+ cycles vs. 300-500 lead-acid—power that keeps pace with your hustle

The NERMAK 12V 7.2Ah LiFePO4 battery pack delivers over 2000 charge cycles with built-in 8A Battery Management System protection, ensuring long-lasting, safe, and efficient power for a wide range of applications including solar setups, camping gear, ride-on toys, and emergency lighting. Lightweight and expandable, it’s engineered for the modern professional who demands reliable energy on the go.

Specifications

Manufacturer	NERMAK
Brand	NERMAK
Model	12V7A
Item Weight	2.1 pounds
Product Dimensions	5.94 x 2.56 x 3.91 inches
Item model number	12V7A
Batteries	1 12V batteries required. (included)
Manufacturer Part Number	12V 7A
Amperage	7.2 Amps

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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