Trail Tech (040-BATT-CH NiMH Battery Charger with Connector NiMH Charge and battery connector for Trail Tech part number 040-BATT3.7 Add a connector on your bike and easily charge and maintain your Trail Tech 3.7 NiMH battery using an AC wall outlet LED charge indicator Dual mode charging: 1.4A normal charge/0.7A Trickle charge