Black and Decker cordless strimmer parts (North Lancing BN15)

Black and Decker Cordless strimmer batteries and charger. 36V (see pics)
Charger works fine, batteries not holding great charge, handle unit faulty but maybe fixable?
Any good to anyone for spares?
I've bought a new strimmer so not needed anyway.
All to go together. Collection from North Lancing.