Not 100% sure about the size but consider this? [Lithium Ion Polymer Battery – 3.7v 100mAh : Adafruit Industries, Unique & fun DIY electronics and kits](https://www.adafruit.com/product/1570)
Wormminator
Honestly, this is the one and only place where I would consider AliExpress as a source for bateries.
Measure its dimensions and start throwing those at AliExpress or any site you can order various lithium ion pouches from.
3 Comments
Not 100% sure about the size but consider this?
[Lithium Ion Polymer Battery – 3.7v 100mAh : Adafruit Industries, Unique & fun DIY electronics and kits](https://www.adafruit.com/product/1570)
Honestly, this is the one and only place where I would consider AliExpress as a source for bateries.
Measure its dimensions and start throwing those at AliExpress or any site you can order various lithium ion pouches from.
I just found [a battery on Amazon that has the same dimensions and capacity,](https://www.amazon.com/Liter-energybattery-Battery-Rechargeable-Connector/dp/B09FLX9VZD) but I’m concerned it might not be safe.