Source German supplier high quality 0 cycle 3,8 v 1624 mAh LiPo battery for iPhone SE on m.alibaba.com
3 x AAA Battery Holder with On/Off Switch and 2-Pin JST : ID 727 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Varta 1x24 Energy Micro AAA LR 3 Batteries Blue | Dressinn
VARTA Longlife Power AAA Micro LR03 Battery Alkaline Battery – Made in Germany – Ideal for Toys Torches Controllers and Other Battery-Operated Devices: Amazon.de: Electronics & Photo
Amazon.com: VARTA Longlife Power AAA Micro LR03 Alkaline Battery (10-Pack) - Made in Germany - Ideal for Toys, Torches, Controllers and Other Battery-Powered Devices : Health & Household