The D420 6Cell Battery JG168 offered by Dell is compatible with certain products of batteries manufacturers. Dell Laptop batteries are specifically designed for each laptop brand and model. This battery also works great as a spare providing extra power when travelling or away from the home/office. Always on the go- No more worries for running out of battery power! You can back up your system with this D420 6Cell Battery JG168 from Dell. The battery lets you work seamlessly when you are on the move for business trips or vacations.