I also want to buy backup battery but no one sell it.. even chuwi not selling battery and saying please send back the device to us! what a company that even cant provide backup battery for their product!!! battery not getting charge on windows10 or powered off state!
I opened my HiBiook and have to say it was easy. Now the problem is to find a compatible battery. The whole package measures 133x120mm. I still didn't remove the battery so I cannot say how thick it is. There are even 9600mah batteries this size. As you can see the Chuwi battery has 4 wires but some batteries available for purchase only have two. Does someone know if a battery also with just 2 wires works OK? What are the other wires for; overcharging protection?