Update: Since the DX-286 arrives without a battery I have received many questions about recommended 18650 cells which will fit as they vary considrably in length and some are too long to fit, The designer of the Qodosen radios sent me three recommendations and here they are with my peronalized links to get them at Amazon US.

https://amzn.to/3VrpB6C

https://amzn.to/3KIZljb

https://amzn.to/3XiOCnh

Jay Allen