Is my battery toast?

[pinzmann]

So I haven’t flown my mini 2 for a while. Of the 3 batteries, one was at 0%. I charged it up to 100%. Checked the battery on controller, it showed full and 100%. Was in the air for a minute and got the low battery warning, forced landing. Luckily I was only a few hundred yds away. Now it shows 99% on controller screen and when I go into the battery page on controller it shows full bars but it won’t let me fly as it says low battery warning. Any way to discharge the battery and recharge it?