This is my first "smart" phone. I came to the G1 from a "stupid" phone, the Motorola V3m Razr(Verizon), but it may have some redeeming value afterall. I'm not going to state that this is safe, you are responsible for your own electronics, but I'm just going to share my experience. Since both phones use a mini-usb charger, i looked at the specs on the chargers. The Razr charger pulls slightly less current so I felt safe trying it out. Why? I was at my girlfriends house and forgot my charger if you must know. Anyway, it worked for me. I imagine that if I timed it, the Razr charger probably charges slightly slower, but it worked. I haven't tried with my Razr car charger yet, but it could mean not having to buy another charger for this phone. Hope this helps someone.