Upgrade Your GEM e4 to Fleet Lithium Replace the factory lead-acid batteries in your GEM e4 LSV (2005–Present) with a high-performance 76.8V LiFePO4 kit from Fleet Lithium. Complete conversion kit — battery, charger, bracket, cables, and all hardware included. Choose Your Capacity Capacity Range Best For 76.8V 105Ah Up to 75 mi Daily driving 76.8V 168Ah Up to 95 mi Max range, all-day use What's Included 76.8V NexGen Fleet Lithium LiFePO4 Battery (selected capacity) CH8713 — 87.6V 13A LiFePO4 Smart Charger BR3374 — GEM e4 Bracket Kit AC0219 — AC Power Connector CB0917 — Cable Set (35.4") Digital State-of-Charge Gauge All mounting hardware Key Specs 300A NexGen BMS with 800A peak surge Patent-pending fire suppression system Built-in cold-weather heater — activates automatically below 32°F (standard, not an add-on) Bluetooth monitoring — voltage, temp, cycle count from your phone 10-year warranty — designed and assembled in the USA Fitment Guide OEM Model Years Factory Voltage GEM e4 2005–Present 72V For 1999–2004 GEM LSV models, see our separate GEM LSV listing. Controller Compatibility The GEM e4 uses a factory 72V controller. The 76.8V Fleet Lithium pack is designed to work with the factory system. No controller reprogramming is typically required for standard installations. Will this fit my GEM e4? Yes. The BR3374 bracket kit ensures a factory-fit installation. No modifications required. Do I need to reprogram my controller? No. The factory 72V controller is compatible with the 76.8V lithium pack out of the box. How long does installation take? 30–60 minutes with basic hand tools. Does it work in cold weather? Yes. Built-in heater activates automatically below 32°F — standard on every pack. *Range estimates are maximums under ideal conditions (flat terrain, single rider, 12–15 mph, 70°F). Actual range varies with terrain, weight, speed, and temperature.
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