Will some AC and car chargers damage the Vogue due to variences in volts and amps?

[sanvara]

I have purchased a couple car and ac chargers and have noticed differences in volt/amp output.

The oem AC charger is 5 volt 1 amp. I also have an AC charger for my Motorola Q with the same mini plug that is 9v 0.8 amp. I haven't used this for fear of possible damage to the Vogue due to volt/amp differences.

An HTC brand car charger I bought for the Vogue is 5 volt 2 amp which is different than the OEM AC charger 5 volt 1 amp. Does this matter?

I ordered a car charger off ebay and it has the mini plug and it has no amps and voltages listed and it simply has a model number of HT 2125. Is this one safe for the Vogue?

How do I know which chargers are safe and which are not? Or am I being overly paranoid?