Electronic goods - not functioning (Durham DH1)

Two items that a person good with electronics might be able to fix:
1) H-Handy 700 Hoover hand held cordless vacuum. Won’t charge and I cannot source battery packs.
2) Ring doorbell generation 1 gold colour. The front plate of the button came away and got lost outside, and I think there was a little plastic bit that was in between that and the inner bit to make it ring. The small rubber seal for the button was saved. It charges up fine. Just won’t ring.