Amazon.com: Synergy Digital Cell Phone Battery, Works with HTC ONE M8 Cell Phone, (Li-Pol, 3.8, 2600mAh) Ultra High Capacity, Compatible with HTC 35H00214-00M, BOP6B100 Battery : Cell Phones & Accessories
Amazon.co.jp: Orei World Travel Plug Adapter M8 Max - 3 USB + 18W USB-C Inputs - 2 USA Outlets - Attachment for Europe, Asia, China, Japan, Africa - Perfect for Cell Phone,
Cablematic - BCC cable M8 male to female 3-pin 2 m: Amazon.de: Computer & Accessories