Thanks for all the insights guys. I am going to buy one replacement battery and the other one is going to turn into an experimental thing, maybe source some individual higher amperage batteries, build them in myself to see if my soldering works and using something like thick multistrand silicon wiring will do the job.
@Bluejets: The only replacement Bosch battery I have found was about $67 which is about R900. the replacement will cost me R250 which makes the sums work. At R900 I am pretty close to a new drill.
I went and had a look at the drill. The transformer is made in China but both the drill and the batteries say Made in Malaysia, don't know if that's better or worse lol.
@Bluejets: The only replacement Bosch battery I have found was about $67 which is about R900. the replacement will cost me R250 which makes the sums work. At R900 I am pretty close to a new drill.
I went and had a look at the drill. The transformer is made in China but both the drill and the batteries say Made in Malaysia, don't know if that's better or worse lol.