Amazon.com: CQRobot MicroUSB Battery Holder (3xAA), Can Hold 3 AA Batteries. Compatible with Arduino Controllers with Micro USB Interface. : Electronics
Micro Battery Pak & Charger
Battery pack holder | micro:bit
2 x AAA Battery Holder with Switch and 2-Pin JST for MicroBit – 4tronix
Micro:bit Battery Pack – Fair Chance Learning
10,000 mAh Portable Battery with Micro USB Cable, Silver Mobile Accessories - EB-P1100BSEGUS | Samsung US
Kit of 2 NANO-V98 batteries and GPM-X2S V-Mount Charger (Travel Kit)
EBL USB Rechargeable 9V Lithium Batteries - 5400mWh Long Lasting LI-io – Camera Commons