Can I charge a device/power bank whose input rating is 5V/2A with a charging adaptor of 5V/1A?

[AC Question]

I have a power bank whose input rating is 5V/2A. Can I charge this power bank with a 5V/1A output wall charger/adaptor?

 

[belodion]

Yes. It may take longer to charge.
If you do it, please tell us how much longer it takes.

 

[SandieL]

I have a leed's power bank 7120-49 input DC 5V/550mA. It doesn't seem to charge I had it charging 24hrs and nothing. The output is 5V/100mA. If anyone can give me any ideas. Plus when I first got it did have some charge and it did seem to charge my s4 at least for a short time.

 

[Thomas1155]

Yes. It may take longer to charge.
If you do it, please tell us how much longer it takes.

NOTE: SOME DEVICES CAN ONLY HANDLE 1A SO CHARGING SUCH A DEVICE WITH 2A WOULD CAUSE DAMAGE OR EVEN FIRE!!

5V x 1A = 5W
5V x 2A = 10W
10W / 5W = 2
so it would charge twice as fast with 2A then 1A

Proof:
example: phone battery has 3Ah (=3000mAh)
time = Ah / A = 3Ah / 1A = 3 hours of charging
time = Ah / A = 3Ah / 2A = 1.5 hours of charging
3h / 1.5h = 2
so it would charge twice as fast with 2A then 1A

 

[Rukbat]

Thomas, the amount of charge is determined by the device being charged, not by the charger. (I normally charge my phone from a 5 Volt, 30 Amp power source [because it happens to be on my desk] and have never had any problem.)

Charging a phone with a charger rated for more current than the original won't cause any change - the phone will drawe its rated current and charge normally.

Charging a phone with a charger rated for less current than the original will cause the phone to charge more slowly, because the phone can only draw the amount of current that the charger is capable of supplying. But it still won't cause any problem.