Shimano Altus RD-M310 7-8 Speed Rear Derailleur Black Travel Unrestrictedbikes solution to this problem

Unrestrictedbikes solution to this problem is to only use Fast chargers

People tend to forget the seal open after use allowing moisture to get in

We recommend using zip straps around battery and frame to hold it in place securely

Controller

Shimano Altus RD-M310 7-8 Speed Rear Derailleur Black Travel Unrestrictedbikes solution to this problemThe Shimano RD M310 Altus SGS Rear Derailleur Black is a 7 8 speed MTB style component group for city sport and youth bikes. In addition to an excellent cost performance, ALTUS provides a feeling of "easy control" that inspires confidence, especially among novice cyclists and younger riders.