I know this has probably been said already, but in case not, everyone who still has a T600 that's looking for the iTip for the iGo chargers we have them at RadioShack. The T600 tip is SKU 273-1935. Works perfectly. Now for the T650 users I'm not sure. I've read in other posts that iTip 273-1310 (A00), works for the 650. I cannot confirm that right now, but I will when my co-worker get's here with his at 6pm today. I'll let ya'll know.