What about Neo's powerbank especially this (I am using the PB13000 known as 13,000 mAH version):
Recently my classmate who specialize in smartphones claimed to me that my iPhone 5S battery cmi and it is closely related to the powerbank I am using (Above).
Given that it is true where my phone gets heats up very easily, I agreed to let him change the battery and there is indeed some expansion in the battery itself.
So does anyone can verify the claim independently? I see no issue on the charge / discharge part.
I can't comment unless you are able to measure the output of the power bank effectively (using a USB doctor is one way).
It looks like a copycat of Romoss Power bank don't you think?
Not sure which company came out first though.
Your phone must be about 2 years old? If so, battery capacity would definitely be lower due to ageing. My 2 year old iPhone 4S only held about 70% of it's charge (meaning, when I charge my phone to "100%", the actual percentage is 70%).
I fail to understand your last two paragraph. Can you rephrase? I only understand that he changed your iPhones internal battery, right?