Bosch PowerMore 250 Range Extending Battery, The smart systemPowerMore 250 is the additional battery the size of a water bottle for even greater range and longer lasting trail fun. Compact in size and weighing just 1. 5 kilograms, the range extender mounts in place of a bottle cage on standard bottle bosses. The PowerMore 250 can be combined with PowerTubes and CompactTubes of the smart system. Determine compatibility with the PowerMore 250 via the eBike Flow app ( Settings > My eBike > eBike pass > eBike