intelogent
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USB phone chargers - are all chargers equal
what is the standard for USB
can u compare the measure of amps and volts comming from my PC vs a wall charger ? and are all wall chargers made equal?
.I have been told some are 2 amp others are one amp.... can anyone comment on this and help me learn ?
can u compare the measure of amps and volts comming from my PC vs a wall charger ? and are all wall chargers made equal?
.I have been told some are 2 amp others are one amp.... can anyone comment on this and help me learn ?
ASKER
ok,
thanks... do all usb ports of a computer output the same volts and amp.... and would you know what that is please ?
thanks... do all usb ports of a computer output the same volts and amp.... and would you know what that is please ?
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ASKER
i just ordered the meter... thanks
http://en.wikipedia.org/wiki/Common_external_power_supply
A decent charger such as this has a CE quality mark and can deliver up to 2 Amps
without the voltage dropping below 5V.
I wouldn't bother with lower ratings.
Also look for ....
Surge protection
Temperature and short circuit protection