Shimano SM-BCR2 charger for Di2 internal batteries (e.g. BT-DN110). Input 5V 1A, output 8.4V 0.4A. 

Specifications:
Brand: Shimano
Model: SM-BCR2
Type: Di2 Internal Battery Charger
Input: 5V 1A
Output: 8.4V 0.4A

Fully working and in great - includes micro USB cable not pictured

Postage / local pickup available