We’ve yet to see a Windows laptop with battery life longer than  5~ 7 hours, unless we add an extended battery to the system. But when hp and dell launched its new series of laptops last week, one big push was for longer battery life.

When you purchase your notebook, charge the battery to 100 percent, discharge it completely, and then fully charge it to 100 percent again to help the battery remember exactly how much electrical charge it can hold. From then on, you’ll never need to completely discharge the laptop battery again, but always make sure when charging it that you let it reach 100 percent. DeHoop told us to “remember to plug in the laptop AC adapter (or dock/port replicator) whenever you get a chance. Most notebooks will recharge quickly.” Salinas had another tip for your batteries: “Keep them cool. Exposure to high temperatures can be a battery’s worst enemy,” he said

Hope the list can give you some help when you purchase a laptop or battery:

Top 5 long battery life for laptop

	HP/Compaq Business NoteBook 6715B Battery 6 cells 4400mAh Description: Type: Li-ion, 6 cells Voltage: 10.8V Capacity: 4400mAh UL certificated cells inside!
	Original HP Pavilion dv8000 Battery 8 cells 4400mAh Description: Voltage: 14.4V Capacity: 4400mAh Type: Li-ion, 8 cells Color: Dark Grey Dimension:205.40 x 69.80 x 20.90 mm Status: New and original. Packing: Plain Box
	Dell Inspiron 6000 Battery 9 cells 6600MAH Description: Type: Li-ion, 9 cells Voltage: 11.1V Capacity: 6600mAh Color: Black
	HP/Compaq Pavilion DV6000 Battery 12-cells 8800MAH Description: Cell Type: Li-ion, 12-cells Voltage: 10.8V Capacity: 8800MAH UL certificated cells inside!
	Dell Inspiron 6400 Battery 9 cells 6600MAH Description: Type: Li-ion, 9 cells Voltage: 11.1V Capacity: 6600mAh Color: Black