Mavic 2 Pro battery led wont light, but its fully charged

[LF60]

HELP, I have a Mavic 2 pro, while flying battery goes from about 60% then within seconds its show critical battery , and lands . This happens with 3 batteries. Now two of them will not turn on at all, the on button has no effect when pushed held or anything. Volt meter on contacts reads nothing. Pulled apart measured battery at 15.volts, so full. Any ideas would be great
The critical error has been random on all 3 batteries. but seems to be ok when straight off the charger

 

[Starz]

History on these batteries?

 

[LF60]

History on these batteries?

original DJI batteries , the drop to critical has been random for about 12 months after being used after idle from auto discharge, seem to work ok direct from the charger. Seems odd the battery measures full charge from the battery terminals but nothing fron the connectors