Brompton Electric - Greenway 345 kWh Batt Ac/p/Gline

The Brompton Electric Greenway is a battery pack designed for Brompton's C, P and G line electric folding bikes. It's the power source that turns a standard Brompton into an e-bike, fitted to work with these specific models and giving you electric assistance across the bike's speed range. The 345 Wh capacity sits at the smaller end of e-bike battery sizes, which keeps weight and bulk down—important when you're dealing with a folding bike that needs to fold and carry easily.

With 345 Wh of capacity, this battery manages realistic everyday distances on a single charge. The actual range depends on how much you use the motor, the terrain, and your own pedalling effort, but it's suited to commuting journeys and short urban trips where you're likely to have access to charging between rides. The battery integrates into the Brompton electric frame design and uses Brompton's own charging system, so you'll need to use the specific charger that comes with it.

The Greenway battery works well for riders who want assistance without the weight penalty of a larger pack. If you're commuting on mixed terrain with the occasional hill, or you want to arrive at work without working too hard on a warm day, this capacity gives you enough support to make a real difference. It's particularly useful if you're combining cycling with public transport—you get the benefit of the motor without sacrificing the compact fold that makes Bromptons so practical for multi-modal journeys.

This battery is a direct replacement or upgrade for compatible Brompton electric models, and it's new stock, so you're getting a full-capacity pack with all the battery life ahead of it. If you own a C, P or G line Brompton electric and need a fresh battery, this is the genuine Brompton part built to their specifications.