Same thing here, when I got it in Round 4 and imbued it to Paint Battery, it allowed me to recharge almost up to full, but leaving it just shy of having one full charge, thus not allowing me to use it.
However, after using Refresher in Round 5, it gives me all the charges, and even shows that it recharges after a one or two are ready to use. However, it doesn't actually again manage to recharge one fully ever, and gets stuck just barely below the charge line. This happens during Round 5 at 0:57. Also, when I do use the last charge, it eats the charge AND all the charge gathered for the next one so far.
MATCHID: 74795472