Except for energy saving plans, there? another way to last laptop computer longer by Dell AC adapter 310-9249-2. Anyway, you can forget the standby time and recharging cycles as long as there? a 65W or more powerful laptop charger available. It should be attributed to the exact 19.5V instead of any higher value while the speed element is closely to 3.34A output current and 65W output power. Even so, I don? mean that it is unnecessary for you to save your laptop battery energy any more while the skills like dimming the screen and ejecting the USB devices can still improve the output power utilization ratio. If you have not emphasis on these functions and are willing to take time on these optimization ways, your 310-9249-2 may be maintained well and your Dell Inspiron, XPS computer will have higher operating rate and more space for some useful features.