Step 1: Things that I used.
Low voltage Downlight kit
Tools - Soldering Iron
Wire strippers or Pliers
1hr of your time
Step 2: Disassemble cordless drill casing
remove all screws and pull housings apart carefully
Step 3: Remove drive motor and chuck assembley
Step 4: Strip and prepare wire connections
Step 6: Check for fit
Put wires nicely in place being careful not to pinch them between the two covers.
Step 7: Reassemble and test.
and best off all it comes with a carry case and a spare battery. Thx mum.