The best thing you can say about a starter battery is that you never have to say anything about it at all; it should simply work every time you turn the key. An even better one doubles as an auxiliary power source.
At just 21 pounds, the OrangeTop QH6 LiFePO₄ dual-purpose power unit punches above its weight, delivering 880 amps of cold-cranking current at 0°F while remaining reliable down to -20°F. In late autumn testing in western Montana (down to 18°F), the OrangeTop never failed to crank over my often cranky diesel Land Rover.
Optima’s battery management system (BMS) is a standout feature: an onboard microprocessor continuously monitors the energy cells, balancing the state of charge to optimize lifespan and performance. A full suite of data in the Optima Bluetooth app keeps tabs on health, state-of-charge, temperature, and more—invaluable when you need reliable power assurance far from civilization. The BMS also integrates Optima’s Critical Power Reserve (CPR) feature. When your system runs low, it intelligently disconnects parasitic loads and reserves enough energy for engine starts. You can activate CPR manually via the app as well.
At just 45 amp-hours, the OrangeTop won’t be your best pick for auxiliary power, and you will need a lithium-specific charger for long-term maintenance. But for overlanders who want a lightweight, high-cranking battery that can double as a deep-cycle source for mild auxiliary loads, the QH6 is a compelling choice, and comes with a five-year, free-replacement warranty.
$850 | optimabatteries.com
Editor’s Note: This article was originally published in Overland Journal’s Summer 2026 Issue.
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