Description
The Jolla Phone had an easily accessible and user-replaceable battery: unclip the back of the phone (called The Other Half) and easily replace the battery!
Other source
You can buy these alternative from the following links:
PATONA Batteria B0PA2100 on amazon (not tested)
https://amzn.to/48DRu0X
Bopa2100 Battery 2000mah 7.6wh 3.8v Compatible With Htc Desire 310 (not tested)
https://www.fruugo.it/batteria-bopa2100-2000mah-76wh-38v-compatibile-con-htc-desire-310