Roomba - old robot cleaner (Pant SY10)

This is quite old and has been stored in a cupboard for some years. It does not charge properly on the battery that's in it. There are 2 more batteries with it - one may be the original and one may be a replacement never used, so possibly dead too! It has its docking station and a spare filter + its owner's handbook. If anyone wants to try and revive it - good luck. No guarantees! Collect from Pant most times this week.