It's an easy enough process. The video link will walk you through it
You may find that it isn't the battery that's causing the problem. There is a dedicated battery management chip on the controller core board and this has a tendency to burn...
Remember the self driving Dominoes Vehicles they said were gonna revolutionize the way they Delivered? They tested those little buggies here in Bakersfield. They did end up feeding every person that figured out that tossing a 4x4 under it meant...
Y'know how hunters like moose heads on the den wall? I've now got a mental image of some Mancunian chav sitting in his mum's council house with a big spliff and a range of delivery drone motherboards nailed to the wall over the gas fireplace...