The first two days I played games, the the battery went down to 20% quick but I thought was reasonable and recharged it. Played games again and the battery discharged to less than 20% at the same rate. But now after I recharged the third time, the battery is lasting more than twice as long even after many hours of playing games. I read that the battery needs conditioning by letting it discharged to less than 20%, is that what happened here? thanks