Battery Voltage Low on GivBat 9.5 Gen 2

Hi.

I had a red light on the front of my battery (its 100% charge but not discharging) looking in the notifications while I was away its had 3 days with Battery Voltage Low warning after full charge in afternoon but on the previous 2 day it cleared the warning after 3-5hrs. Not cleared it today. Any suggest as to what if anything I can try?

[Ed. Has now cleared and is discharging but clearly an issue which will probably happen tomorrow]

Thanks