Stay connected with this 90W AC power adapter. A great replacement for the original Dell charger. This new charger is compatible with the Dell PA-10 PA10 UU572. This notebook charger contains a smart device surge protector to protect from over voltage, temperature and short-circuiting.This power adapter recharges the lithium battery while your system is off, on, or in sleep mode. Will also power the system if you choose to use your computer without a battery.