It's not just you. Others, including me, have experienced the issue. The N900 is picky about which recharger it works with. I think it's a matter of how the data connectors are wired. Yf they aren't wired correctly it confuses the N900. (That's my theory on the problem). My no-name AC/car DC adapter w/ USB database won't charge the N900. I bought a Rocketfish branded Car recharge and that did the trick.