LiFePO4 starting power
1200CA of cranking output in the original family-size footprint.
35 / Q85 BUYER GUIDE
This 12.8V LiFePO4 starting battery provides 1200CA of cranking output and 40Ah of rated capacity in a 35 / Q85 case weighing 15.4 lb.
Use the specifications below with your vehicle manual and current battery label. Group size alone does not guarantee compatibility.
| Specification | 40Ah |
|---|---|
| Rated capacity | 40Ah |
| Cranking amps | 1200CA |
| Weight | 15.4 lb |
| Price | $874.99 |
Unsure? Compare these specifications with your current battery and vehicle manual before purchase.
COMMON QUESTIONS
Not automatically. Verify case dimensions, terminal orientation, hold-down, required cranking amps, charging-system compatibility, and any sensor or special connection used by the vehicle or boat.
Use a charger with a 12.8V LiFePO4-compatible charging profile and follow the PowerTex instructions. Avoid lead-acid-only reconditioning or desulfation modes.
The integrated BMS protects against overcharge, over-discharge, and short-circuit conditions while monitoring battery operation.
If low charge or BMS protection shuts down the main output, use the PowerTex app to activate the battery's emergency starting reserve directly from your phone. Recharge the battery and diagnose the cause after use.
PRODUCT DETAILS
The PowerTex Group 35 / Q85 is a 12.8V LiFePO4 starting battery designed for strong cranking performance, lower battery weight, and integrated electrical protection.
1200CA of cranking output in the original family-size footprint.
The battery management system protects against overcharge, over-discharge, and short-circuit conditions.
If low charge or BMS protection shuts down the main output, activate the battery's emergency starting reserve from your phone in the PowerTex app.
Coverage is subject to the terms for this battery. Review the automotive warranty terms.
IMPORTANT FITMENT NOTE
This is a PowerTex aftermarket component, not an OEM battery. It does not include the sensor port found on some original batteries. Verify the case, terminals, hold-down, charging system, and vehicle connections before ordering.
Contact PowerTex for safety and transport documents for your exact battery model. Confirm any required certification and environmental rating before purchase.
Always follow the vehicle manufacturer and PowerTex installation and charging requirements.
Enjoy free shipping on all orders within the lower 48 states.
Return within 30 days of delivery. Shipping fees are non-refundable.
Get the most from your LiFePO4 battery with compatible charging and regular care. Battery life varies with temperature, storage, electrical loads, and depth of discharge. Keep the battery charged within its specified limits and investigate unexpected drain promptly.
Experience peace of mind with our cutting-edge Battery Management System (BMS), acting as a vigilant protector against overcharge, over-discharge, and short-circuit incidents. This intelligent system tirelessly monitors and controls battery performance, ensuring both your safety and the durability of your investment.
Safe use starts with correct installation, secure mounting, protected terminals, and compatible charging. Do not submerge the battery or use a damaged unit. Contact PowerTex for the test documentation and environmental rating that apply to your exact model; these can vary by battery.
If low charge or BMS protection shuts down the battery’s main output, activate its emergency starting reserve from your phone in the PowerTex app. Recharge the battery and diagnose the cause after use.