What is the best way to change a battery?

Hello,

I have changed a battery to new one for my Xperia Z3 compact.

After changed the battery, I could not charge to new battery from any chargeable devices (such as Anker or Aukey).

Therefore Z3C do not start.

Currently I can see a red LED when I connected microusb cable for battery charge.

Would you tell me how do I resolve this problem ?

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Why did you change the battery? did the old battery charge? IF so, then you may have a bad battery.

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