A quick vid showing how I reassemble the head of an Anki Cozmo robot after a teardown/repair.
I can replace the battery in your robot:
https://www.ebay.co.uk/itm/304286006019
Thanks,
John.
Some (affiliate) links to tools:
Soldering Iron:
https://www.amazon.com/Soldering-Digi...
Tip Cleaner:
https://www.amazon.com/Soldering-Iron...
Precision Screwdrivers:
https://www.amazon.com/STREBITO-Screw...
PCB Holder:
https://www.amazon.com/MMOBIEL-Adjust...