I have a Samsung Galaxy Ace II x (GT-S7560M) that I bought last August. Recently, it has started losing battery power very quickly. I don't use the phone very often; I usually check it once or twice a day, and the rest of the time it stays dormant. It used to be that I could get seven days out of the battery before it would die with this much use. But recently, the charge will last three days at the most. For example, the other night, the phone had a charge of 52% when I went to bed, and had a charge of 30% when I woke up eight hours later. I had bought this phone when I went away to school, and used it occasionally during the day, getting about 3-4 days out of the battery, however, now that my semester has ended, I am not using it much anymore. When the semester had just ended in April, as mentioned above, the battery would last a week, but since then, the life of the battery has gotten shorter after each charge (I charge the battery only when it is 20% or lower). If anyone could shed some light on this, it would be very much appreciated. I understand that 2-3 days par for the course for the battery life of most smartphones, but given that I’m barely using it, and that it lasted much longer in the past, I find this peculiar. Thanks in advance.