Lithium Deep Cycle Batteries

Ionic Lithium Deep Cycle Batteries — Steady Power That Lasts

A deep cycle battery is built to deliver power steadily over long periods and be drained and recharged thousands of times — exactly what your trolling motor, golf cart, RV house system, scooter, or solar bank needs. Ionic LiFePO4 deep cycle batteries do that job lighter, longer, and with zero maintenance compared to lead-acid, and every model drops straight in as a plug-and-play replacement.

Deep Cycle vs. Starter Batteries

A starter (cranking) battery delivers a short, powerful burst to start an engine. A deep cycle battery is designed to release power slowly and consistently, and to be discharged and recharged repeatedly over its lifespan. It’s what powers your trolling motor, golf cart, onboard electronics, RV appliances, and solar storage. Some Ionic batteries are dual-purpose and handle both roles, but most setups pair a dedicated deep cycle battery with a separate starter battery.

Shop Deep Cycle Batteries by Application

Ionic deep cycle batteries are purpose-built for a wide range of uses. Choose the category that matches your setup:

• Marine & Boat Batteries — lightweight, fast-charging power for bass boats, pontoons, and more.
• Trolling Motor Batteries — consistent output for 12V, 24V, and 36V trolling systems.
• RV, Camper & Van Batteries — go farther, longer, and off-grid without losing charge in storage.
• Golf Cart Batteries — GC2 LiFePO4 packs for 36V and 48V carts.
• Kayak Batteries — compact, lightweight power for fish finders and motors.
• Solar Batteries — efficient storage for on- and off-grid solar builds.
• Commercial Batteries — durable power for demanding, high-use applications.

Why Ionic LiFePO4 Deep Cycle Batteries

• Lasts 2–4x longer — rated for about 5,000 charge cycles (roughly 14 years at one cycle per day) versus around 400 cycles for lead-acid. Even after 5,000 cycles, they still hold about 70% capacity.
• Up to 70% lighter — roughly a third of the weight of a similarly-sized lead-acid battery with the same capacity.
• Charges 4–6x faster — accepts higher charge currents, with a built-in management system that prevents overcharging.
• Deeper usable capacity — safely discharge past 80% (effectively to empty) with no voltage sag, while lead-acid shouldn’t go past 50%.
• Maintenance-free — no watering, no corrosion cleanup, no electrolyte replacement.
• Bluetooth monitoring — check charge, voltage, temperature, and current from your phone via the Ionic app.
• Lower self-discharge — about 2% per month versus roughly 30% for lead-acid.
• 99% charge efficiency — versus 85% for lead-acid, so less energy is wasted every charge.
• Non-toxic and leak-free — safe to store anywhere, even indoors.

Built Better Inside

Ionic batteries are manufactured with Grade A cells — not the Grade B or C cells used by many competitors — which keeps performance stable over thousands of cycles. They use 20Ah and 25Ah flat cells to minimize connection points, reduce heat buildup, and keep the cells balanced. A Battery Management System comes standard on every battery, including overcharge protection, low-temperature protection, and low-temperature charge protection.

How to Choose

Match voltage to your equipment (a 36V trolling motor or 48V golf cart needs that system voltage, while most marine accessory and RV house systems run on 12V) and match capacity (Ah) to how long you need to run between charges. Need more capacity or runtime? Ionic batteries run in parallel and sync together instantly, so you can add batteries now or expand later.

Warranty & Support

Every Ionic deep cycle battery is backed by an 11-year warranty and 100% U.S.-based support, with free shipping on U.S. orders over $150. Not sure which battery fits your application? Our lithium battery experts can help you choose.