I don’t own a Jumper 3 Pro; instead, I have the “better” 3S model with 256GB initially built in by the factory (now upgraded to 512GB). It’s been running for five months daily with only a 5.4% battery wear.
I also own a Thomson NOX13, which is quite similar to the Jumper 3 Pro and may even share the same battery, but I haven’t been able to find a replacement battery for it. It has undergone three months of light use with 0% wear.
To properly perform the task, soldering is necessary (a cheap soldering iron with a thin tip costing a few euros will suffice), although I’ve mentioned alternative methods.
