I checked my cycle count of the battery using ibackupbot and it told me it has 1,020 charge cycles. I only did this because it dies pretty fast (about 3 hours) and I have to recharge it 3-4 times a day. Also, when I restart the phone sometimes the percentage will jump up about 20 percent higher than before the restart and then slowly climb back down.
Read more: How long is an iPhone battery designed to last?