Looking to go the distance? Want to keep a spare for long rides or just in case? This 36v 5.4Ah waterbottle battery includes a USB port for charging your electronics, and plenty of stealth good looks. For new 2020 Sprinter kits and beyond. Battery only. A replacement controller and mounting dock is available here. For Hilltopper kits made prior to 2020 please see the universal replacement battery or contact support@hilltopperbikes.com with your model and estimated year for replacement battery options (for old 24v kits see our DIY battery module hack for one clever and thrifty option).