Amazon.com: HXJNLDC DC 3.7V 800mAh 603040 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Health & Household
High Quality AAA 1.5V 550mAh High Quality USB Rechargeable Lithium Battery factory and manufacturers | iSPACE Energy
Nitecore NL1836R USB-C rechargeable 18650 Li-ion battery, 3600 mAh | Advantageously shopping at Knivesandtools.dk
Lithium Ion Cylindrical Battery - 3.7v 2200mAh : ID 1781 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
These AAA batteries are micro-USB rechargeable : r/mildlyinteresting