Mahle eX1 (e185) External Range Extender Battery 36V/171Wh

The Mahle eX1 (e185) External Range Extender Battery gives you a straightforward way to push your Mahle-powered ride further without swapping systems or carrying a spare bike. Compatible with the Mahle XS, X20, and X30 drive systems, it mounts directly into a bottle cage and delivers an additional 171Wh of capacity — enough to add up to 43 miles of motor support on a single charge.

The included mount doubles as a standard bottle cage when the battery isn't in use, so you're not giving up anything permanent on your frame. When you do need a top-up, it charges to 80 percent in under an hour — a useful turnaround on longer days in the saddle. At just over one kilogram, the eX1 sits in the bottle cage position without dramatically altering how the bike handles.

Mahle eX1 (e185) External Range Extender Specs at a Glance

• Voltage: 36V
• Capacity: 171Wh
• Extended Range: Up to 43 miles additional
• Fast Charge: 0–80% in under one hour
• Weight: Just over 1kg
• Compatibility: Mahle XS, X20, X30 drive systems
• Includes: Dual-purpose mount and bottle cage