Any FORD mechanics here ????

On my BMW battery was bad, had to use a BMW bat and had to program that battery or a big chance of flame on. Something about interrupting the flow of electricity. He said be very careful when battery dies and then jumping to start, fries everything. My solution is to connect another 12 volt source to the cables, remove old battery, install cables then take off jumpers. No interruption of power. BTW that battery and reprogram was $700