I have a Nokia 2220 Slider phone which has started to play up.
I fully charge it but when someone calls me the phone loses power after a few rings and switches off.
When I turn it back on again, it shows that the battery is fully charged.

Time to throw it in the bin or is there a fix?

I’ve swapped the battery for a new official battery. Same problem.
No problems when receiving, sending or writing text messages.