12.8V 42Ah Battery


Our 42Ah option boasts a full protective BMS with a hard case and M6 Brass Screw terminals.
Weighing only 12lbs, it is great for portable fishing electronics, boat lifts, LED light systems and small solar power applications.


Our LFP battery comes loaded with all the safety and performance features you expect from Lynac in a compact, drop-in ready package. Designed with powerful simplicity in mind so you don’t have to carry any extra weight!

If each Lynac Lithium Technology battery product does not sufficiently meet the outlined performance specifications, a full refund is to be given once the product is returned, inspected, and proven faulty.
Seller assumes a 3-year manufacturer's warranty followed by a 4 year prorated warranty totalling 7 years.
Each product must be registered and proven to be used and maintained according to the recommended operational and maintenance parameters that are to be agreed upon at the time of installation.

To register a product Click Here

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Battery Spec's

Download PDF Datasheet

Product Model: 12.8V 42Ah
Rated Capacity: 42Ah, 537.6Wh
Nominal Voltage: 12.8 VDC
Cycle Life: 2000 @ 0.2C (100% DOD), 6000 @ 0.2C (80% DOD), 10000 @ 0.2C (50% DOD)
Dimensions: 7.75” x 6.5” x 6.53” (197 × 165 × 166mm)
Weight: 12lbs (5.5kg)
Battery Management System: Short Circuit, Current, Voltage, Cell Balancing
Cells: IFR 26650 3600mAh LiFePO4, 4S12P
Charging Method: Constant Current - Constant Voltage (CC - CV): (0.2C to 14.4Vdc) - (14.4Vdc to 0.01C)
Voltage Limits: Charge: 14.6Vdc, Discharge: 10Vdc
Current Limits: Charge: 40Adc, Discharge: 40Adc
Temperature Limits: Charge 0 ~ 45°C, Discharge -20 ~ 55°C, Storage -20 ~ 55°C
Connectivity: Series: 4 Units (48Vdc 42Ah), Parallel: Unlimited (12.8Vdc)
Terminal Connector: M6 Brass Screw
Certifications: UN 38.3, UL1642, IEC626619-3600, 3.2V26650 CB IEC62133
Ingress Protection: IP65

The Lynac Advantage

Certified Grade A Cells

The highest grade cells give our LFP batteries the quality and performance that you would expect from your LFP battery leader.

Oversized BMS

Oversized Battery Management System (BMS) puts our LFP batteries above and beyond the standard, producing peak power output at maximum efficiency will ensure the highest performance and longest cycle life.

Designed in North America

Lynac Lithium is based in North America where we push the limits of battery innovation by designing and building quality products with your feedback!

Battery FAQ



Battery was designed to withstand splash damage and/or brief water submersion.



Battery offers half the weight of its lead-acid counterpart.


Shock Resistant

Battery is vibration tested and designed with solid casing to help withstand shock damage.



Battery is equipped with oversized BMS and wiring to achieve the highest output.

Have more questions? Get in touch with us and we will answer you ASAP!

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