TQ HPR Range Extender BatteryTQ HPR Range Extender Battery Hammer out big days with Range Extender. This compact back up battery adds 160 Wh of power to extend your range by up to 44%. It fits neatly into a Bontrager side load water bottle cage in the inner triangle, where there's a short reach to the charge port, and is secured in place by a retention strap (Range Extender cable and retention strap sold separately). Features: 160 Wh battery Charge port enables charging both bike