The Shimano Di2 internal USB battery charger for the Di2 internal battery has a charging time of 1.5 hours. This allows you to have a fully charged battery again very quickly. The two lights indicate whether it is charging or if the battery is already full. Connecting it is very simple; you plug it in via the junction box, so you do not need to remove the battery.
Only used 4 times myself, so as good as new, no scratches or damage to the device. Works perfectly.

Specifications Shimano Di2 internal USB battery charger

Battery charger for Di2
Charging via USB
Simply plug it into the junction b...