Bosch PowerMore 250 Kit (BBP3625) The smart system. PowerMore 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 can be easily mounted in the water bottle holder. The PowerMore 250 can be combined with PowerTubes and CompactTubes of the smart system.