I've always rebuilt my own battery packs ,cheaper than having someone else
do it and easy too.The 'trick' is to replace ALL the cells NOT the 1 or 2
bad ones.
It is sad that you can buy a drill/charger/batteries 'package' for less than
a spare battery. Welcome to our cheap,use once,toss out,disposible society.
My city(Hamilton,Ontario) will NOT recycle consumer
electronics,steel,aluminium,etc. go figure, it ALL gos into the nearly
stuffed landfill.
Jay