1. Is this battery reliable? This battery is FCC CE and RoHS certified, 500 tests by Pingao, 500 recharge cycles with full 1 year warranty. it prevents any issues from overheating, circuiting, overcharging, discharging and short-circuiting. What's more, the capacity is full 1960mAh capacity, not the fake capacity like other dishonesty sellers. if our battery happens to be defective or fake capacity, please return it for full refund. 2.how to install iPhone battery? 1 Power off your iPhone before beginning disassembly.Remove the two 3.4 mm pentalobe screws at the bottom edge of the iPhone. 2 Use a hairdryer or prepare an iOpener and apply it to the lower edge of the iPhone for about a minute in order to soften up the adhesive underneath. 3 Pull up on the suction cup with firm, constant pressure to create a slight gap between the front panel and rear case. 4 Insert the flat end of a spudger into the gap. 5 etc. 3.NOTE: Due to limitations on space, the instruction only provides some key steps，it is unable to describe vividly how to replace the battery. In order to replace the battery more easily, we strongly recommend you to watch more relevant video about replacing the battery on YouTube before you replaced. Especially pay attention to the details of removing adhesive strip.
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