Pinebook Pro?

[Kochise]

1 - There is no such thing as a standard battery
2 - warranty nightmare and one of the reasons we don't sell DIY kits
3 - There are no resellers in parts of the world (e.g. EU)
4 - How does that make it easier? the legal requirement for high-risk goods shipping states 'lithium ion batteries or devices containing lithium ion batteries(...)' ; so shipping a battery from China wouldn't be simple or cheap either.

Yeah I know batteries comes in all sort of power and shape. I'd be thinking about an encased, rectangular shaped and sized that could be live fitted into a slot like a pcmcia card. Perhaps a bit larger for enough reserve, but you get the idea...

http://www.kokpower.com/kok-power-222wh-..._p136.html
https://www.alibaba.com/product-detail/b...87989.html

https://www.bigupbattery.com/Widefly-10-...008851.htm
https://www.bigupbattery.com/Fluke-116-0...009560.htm
https://www.pdbattery.com/prismatic-life...ttery.html
https://buy.garmin.com/en-US/US/p/122721