Charging 5V 2A input battery with 5.3V 2A Adapter?

Is it ok to charge a power bank with input : 5V 2Amp using Adapter with Output : 5.3V 2Amp ?
Answer #1
Generally yes – standard adaptors have a 5% to 10% error margin anyway.
If it’s critical machinery, medical, x-ray imaging, etc then no, don’t do it.
If it’s a mp3 player of portable tv or general consumer item, it’ll be OK.
Answer #2
It shouldn’t be a problem…0.3V extra wouldn’t be noticeable..
Answer #3
Thanks for reply , will take note.
I’m just afraid that small voltage difference could damage lithium-ion cells…
Answer #4
Is OK…The power bank actually regulates the voltage lower itself anyhow.