Lithium Batteries

Lithium Batteries: LiFePO4, AA/AAA & Rechargeable Power for Every Application

Lithium technology has quietly replaced lead-acid and alkaline power in almost every application that matters — from the deer feeder in your hunting lease to the inverter running your RV fridge. This collection brings together our full lineup of lithium batteries, built around one core promise: consistent power, a smaller footprint, and a battery that actually lasts as long as the spec sheet says it will.

At the center of the lineup is LiFePO4 (Lithium Iron Phosphate) chemistry, the same technology used in solar storage and electric vehicles because of its stable chemistry and long cycle life. Compared to older lead-acid deep cycle batteries, LiFePO4 packs more usable capacity into a fraction of the weight, and it doesn't lose power as it discharges the way lead-acid does. If you're trying to understand exactly why that matters for your setup, our breakdown of LiFePO4 vs Li-ion batteries walks through the chemistry differences in plain language.

Shop by Voltage and Use Case

Not every project calls for the same battery, which is why this collection is really an umbrella over several more specific ones. If you're powering a trolling motor, security camera, or small appliance, our 12V LiFePO4 batteries are the most popular starting point, available in capacities from 5Ah up through 100Ah depending on your load. Larger systems — think solar arrays, trailers, or higher-draw inverters — often call for a 24V LiFePO4 battery instead, which halves the current draw for the same wattage and reduces wiring losses.

For everyday electronics — remotes, game controllers, flashlights, trail cameras — standard alkaline cells add up in cost and landfill waste over time. Our rechargeable AA and AAA batteries use lithium-ion cells instead of NiMH, holding a charge in storage far longer and giving more consistent voltage under load, which matters if you've ever had a device power off early on a "half-charged" NiMH battery.

If your project is closer to a full power system — an RV, a cabin, or a solar bank — take a look at our deep cycle batteries for RV & solar, sized for daily discharge-and-recharge cycles rather than occasional use. And for more specialized gear like deer feeders, ham radios, trailer brakes, or garage door backup power, we've grouped the right-sized batteries together in our deer feeder, ham radio & garage door systems collection.

Picking the Right Capacity

Amp-hour ratings can be confusing if you've never sized a battery before — too small and you'll be recharging constantly, too large and you're paying for capacity you'll never use. Our guide on how to choose the right lithium battery capacity breaks the math down using real device wattages, so you can land on the right size the first time. For heavier-duty needs, batteries like our 12.8V 100Ah LiFePO4 deep cycle battery are built for sustained, all-day power, while a compact option like the 12.8V 6Ah deep cycle battery suits smaller devices where size and weight matter more than raw runtime.

Charging It Right

A lithium battery is only as good as the charger behind it. Using the wrong charger — or an old lead-acid charger — can shorten cycle life or trip built-in battery management system (BMS) protections unnecessarily. Browse our battery chargers collection for chargers matched to LiFePO4 charging profiles, and see our guide on choosing the best charger for lithium batteries if you're unsure which amperage or connector type fits your battery. We've also put together a step-by-step walkthrough on how to charge a lithium battery safely if this is your first time working with LiFePO4.

Value Over Time

Lithium batteries carry a higher upfront price than lead-acid or alkaline alternatives, but the total cost of ownership tends to favor lithium once you factor in cycle life and reduced replacement frequency. If you're weighing the numbers, our lithium battery cost guide lays out current pricing trends by battery type and size. For those building or repairing packs themselves, our DIY battery building collection has cells, spot welders, and BMS components as a separate path from ready-made batteries.

Built for Real-World Use

Every battery in this collection is built around the same LiFePO4 or lithium-ion core, sized differently to match the job — whether that's a backup power source for a garage door opener or the main power bank for a weekend off-grid trip. If you're not sure which voltage or capacity fits your setup, the capacity guide above is the best place to start before you buy.