Batteries & Charging
Range extender
What does Range extender mean?
A small second e-bike battery, usually mounted in a bottle cage, that adds range on long rides and stays at home on short ones.
A range extender is a small add-on battery that plugs into a light e-bike’s main battery system, usually from a bottle cage. TQ lists a 160 Wh extender at 960 g (2.1 lb) for its HPR system, checked November 12, 2026.
How is it different from a second battery?
A range extender is smaller and fits only the system it was made for. A dual-battery bike carries two full packs all the time, while an extender stays at home on short rides, so you carry its weight only when you need the range.
Ribble sells a 171 Wh bottle-cage battery for its MAHLE-powered CGR E AL, on a bike whose main battery is 250 Wh. That adds about two thirds more energy for one bottle cage. Cube offers a 250 Wh Bosch PowerMore extender on its light Nuroad and Nulane hybrids.
It matters because light e-bikes save weight by carrying 250 to 400 Wh. Our lightweight e-bike comparison lists the extenders TQ and Ribble sell.
Also known as: range extender battery, range extenders