It has a replaceable battery installed that can last well over a year of regular use

Cons: It would be great if it had a slightly larger range

Heavy-duty design for MTB and E-MTB applications

If you can't get a seal you can use the 20G CO2 canister to blast the stubborn bead into submission

Bikeyoke Shifty V2 Cable Pulley - Orange Images Uploaded - Ready for Review It has a replaceable batteryThe Shifty V2 allows you to replace the standard derailleur pulley on their SRAM rear derailleur with a high quality, precision machined aluminium pulley with a sealed stainless steel ball bearing. This guarantees reliable and smooth shifting even in adverse, muddy, or dusty conditions. The Shifty V2 is compatible with SRAM 1x11 and 1x12 rear derailleurs as well as the current SRAM Eagle 70 and 90 Transmission models. The appropriate bearing inserts