Official Replacement Battery for Brompton Electric G Line, C Line, and P Line
The Brompton Greenway Battery is the official 345 Wh replacement and spare battery for the Brompton Electric range. Designed natively for the Electric G Line and fully compatible with Electric C Line and P Line models when paired with the current adapter frame bags and Greenway charger, it delivers 30–60 miles of range per charge and recharges fully in 5 hours. One quick click removes it from the bike — unclip, bring it inside, plug in anywhere.
Keeping a second battery on hand at home or the office effectively doubles your daily range without any change to the bike itself. The battery's top-mounted controls let you set your power assist level and manage lighting directly, without opening an app. Brompton's e-bike system is certified to the UL 2849 standard — the most comprehensive e-bike electrical safety test available — and meets NYC regulations for the safe sale and use of e-bikes and batteries.
More Miles, Same Compact Package
- 345 Wh capacity — 30 Wh more than the original Brompton Electric battery — for 30–60 miles (40–70 km) of range per charge depending on assist level, terrain, and rider weight.
- Charges fully in 5 hours from 0–100%; 4 hours to 80% (Greenway charger sold separately).
- One-click removal from the bike for easy indoor charging from any standard outlet.
- Top-mounted LED charge indicator shows level at a glance via 1–5 blue LEDs.
- Top-mounted control button cycles through three power assist levels (1–3) or Off, and adjusts lighting between On, Off, and Auto sensor mode — no phone required.
- Designed for the Electric G Line (20" wheels); compatible with Electric C Line and Electric P Line with current adapter frame bags and Greenway charger.
- Not compatible with original Brompton Electric (16" wheel model) or BMZ battery chargers.
- Brompton e-bike system certified to UL 2849 — the most comprehensive e-bike electrical safety standard — and meets NYC regulations for sale and use.
- Works with Brompton Electric App for range estimates, ride tracking, and smart power management.
