This is the replacement rear derailleur battery for Campagnolo's WRL wireless ecosystem. Critical distinction worth getting right before you order: the battery cell is shared across Campagnolo's 12-speed and 13-speed wireless groups — Super Record Wireless, Super Record 13, and Record 13 — but the front and rear derailleur batteries are NOT interchangeable between positions. This is the rear-specific unit, keyed and packaged for the rear derailleur only. If you need a front, order the front SKU instead.

Range on a full charge is approximately 750 kilometers, or roughly 465 miles, which puts most riders in the multi-week window between charges depending on volume and shift frequency. The battery mounts directly to the rear derailleur body and is removable for charging off the bike using Campagnolo's dedicated charger. That removability is the practical advantage of the WRL system over some competing wireless groups — you're not pulling the bike out and finding a wall outlet within reach of the derailleur. Pop the battery off, charge it on the bench, reinstall it.

The rear-specific shape and contact configuration is why this isn't cross-compatible with the front derailleur position. Campagnolo designed each unit to seat correctly on its respective derailleur, and the firmware handshake between battery and derailleur expects the matching pair. Trying to run a front battery on the rear derailleur isn't going to work mechanically or electronically, so confirm you're ordering the right one. The packaging and SKU (PU03-WRLRD) both indicate rear.... Read More