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Re:If your iPhone is slow, try replacing the battery by EGreg on Sunday December 10, 2017 @01:16AM (#15890232)
How do you physically replace the iPhone battery? And where do you buy the replacement?
Re:If your iPhone is slow, try replacing the battery by pronoiac on Sunday December 10, 2017 @01:24AM (#15890247)
For both of those: see ifixit.com .

I trust their batteries and their directions.

Re:If your iPhone is slow, try replacing the battery by gargravarr on Sunday December 10, 2017 @11:25AM (#15892081)
Definitely. I replaced a screen on a 4 using an iFixit guide. Very detailed.

A great tip I used, iPhone parts are so small and fiddly. Print out the instructions, and at each step, if you remove screws, tape them to the whitespace beside each step. Then when you reassemble in reverse order, you know exactly which screws to use.

Re:If your iPhone is slow, try replacing the battery by qd6pwu4 on Sunday December 10, 2017 @02:28AM (#15890411)
I bought the battery and replacement kit on Taobao, like China's ebay. Just pull up the front panel and replace the battery.