Charger Voltage & Amperage

[raffiy]

Hi,

my whole family recently replaced their phones, meaning a plethora of new chargers. I justed wanted to confirm something before we left for vacation unprepared.

All of our devices use micro USB and are:
EVO 3D (5V @ 1A)
EVO 4G (?V @ ?A)
EVO 4G (?V @ ?A)
Blackberry Bold (?V @ ?A)
Kindle 2 (4.9V @ .85A)

Can we use the same charger across all of these devices assuming the voltage output on all is identical? As far as I understand, voltage must match +/- a few percent, the connector must match, and you use the charger with the highest amperage and the device does the rest, is this correct? Will using a different amperage charger damage these devices?

 

[jaguarskx]

To the best of my knowledge, all USB devices operate on 5v using varying amps.

While looking at AC outlet chargers with multiple USB ports, I came across some information which seems indicates that there are at most a total of 2A available for all USB ports combined. Therefore, a charger with 4 USB ports means each port will provide up to 0.5A if all ports are used.

USB chargers that are described as "iPad compatible" means that the charger can provide up to 2A; otherwise it might only provide a total of 1A across all the USB ports.

Generally speaking, devices will only draw enough amps to charge the device. There should be no fear of too much amps damaging your electronic devices unless there is an electrical surge. In that case all bets are off.

I have my eye on the following 2A USB charger with 2 ports which means it provides up to 1A per port if two devices are being recharged.

http/www.amazon.com/gp/product/B001QVHO38/ref=ox_sc_sfl_title_3