Originally Posted by greggebhardt
No doubt about it, all the chargers are the same.
Having replaced a 7290 with an 8700, I thougt the same thing. After a couple of weeks of use. I noticed something funny. While browsing these forums with the the 8700, while charging with the 7290 charger, I noticed the charging signal (Lightning Bolt) would return and the go away periodically. Researching this, I checked both chargers, the 7290 has an output rating of 0.5 Amps, while the 8700 has a rating of 0.75 Amps. At least, that's what's on my chargers.
Hope this helps.