Battery discharging EXTREMELY fast

[shu73upwr]

Does anyone else encounter this problem? This started very randomly, so I dont think it has anything to do with battery degradation. This only started happening a few days ago.
I want to know if im the only one with it and if I should replace my battery or if its something software related.

 

[shu73upwr]

У меня естьI have the same problem after 20% the battery drains very quickly in 5 minutes

The thing is, this is very random, it doesnt ALWAYS drop from 20%, sometimes it drops from 100% to 90% in few mins, or sometimes it just doesnt do that at all.
Im wondering if this could be because of the cold, tho i dont remember hsving problems last winter