Greetings, Everyone. I have a question regarding two chargers I have; will they work with my Sprint HTC Evo? I am aware that the manual states I should only use chargers from Sprint / HTC, but as many people do, I am considering 3rd party accessories. The first wall charger is an adapter that I used with my Palm Treo 755p. It has a USB plug, so I am wondering if I can just take a micro USB cable and reuse the adapter. The difference in the specs between this one and the charger adapter that came with my Evo is that the Output says 5v/400mA for the Palm charger, and on the Evo charger, the output says 5v/1A . Palm Charger Wall Charger Adapter (plugs with a USB cable) Input: 100-240v, 50-60Hz Output: 5v =:= 400mA The second wall charger (with built-in cable) I got from Amazon. The item is listed as part of a package. If you look at one of the reviews, the person stated that the Sprint Tech Center says the adapter will void the warranty. Now, I know that using any non-Sprint / non-HTC charger voids the warranty (even if it works), so I was wondering if the Tech Center was just saying that to as part of a policy. Amazon / Accessory One Charger Input: 100v-250v, 47-63Hz Output: 4.2v-12.5v, max 1000mA For reference, here are the specs on the charger that came with my Evo. Official Evo Charger Palm Charger Wall Charger Adapter (plugs with a USB cable) Input: 100-240v, 50-60Hz Output: 5v =:= 1A So, can I use either charger? I do not know electronics very well, but feel free to throw scientific terms at me, as I can look things up if necessary to understand things. My thanx in advance.