I bought an S24U recently, and the seller said "it charges sometimes".. for that, it was a problem of pocket lint. But i noticed that it never charged over 20%. then noticed it's back popped off, so took it off, replugged the battery, and it showed all kinds of % after consecutive tries (20, 27, 30, 33). some tech friends said to leave it overnight on a "trickle" charger. in the morning, it showed a yellow warning symbol, and showed it didnt charge much (Last time it charged to 19% and...Read more