[compuw22c]

First, I'd like to start by saying that a chargers amperage rating is similar to the size of the pipes in your house. That is, when you turn on the faucet (plug into the charger) it will only provide what is necessary (a trickle to a spray) no more. Its the same reason your batteries last longer in a remote than in a vibrator. You are VERY correct in stating that Lithium batteries can be damaged by charging too quickly (as can ALL batteries). In fact, as a previous owner of a touch pro (original) I know this all too well. A "Feature" of the TP was that if you began drawing sooo much power (tethering) that the charger was just barely able to break even, once it heated up to a certain temperature it would STOP charging and only discharge.

This brings me to my main point. Any semi-intelligent phone (and probably ALL phones) have some sort of charging monitoring/control system. Usually it involves a combination of temperature sensing, draw sensing and charging sensing but in the end they all provide a correct voltage and correct AMPERAGE for the situation. Also worth noting is that our 3.7v batteries can't be charged directly from 5v from USB, it must be adjusted by the charging circuit down to 4.1-ish, MAYBE as high as 4.3 (I forget the exact figures, its late). It is both transformed and regulated before it EVER hits the battery.

Long story short, I've been mixing and matching usb chargers for years now and will continue to do so. Although I also bought a pair of nice cheap ebay batteries (desktop batt charger, 2 batteries, car charger + usb $30) so this is kind of a non-issue for me...