Most laptop battery cells are constituted of a battery pack as this dell Latitude D620 battery
, it's made of six batteries. The six batteries are connected by a few of charge and discharge detection circuit protection. When our laptop battery has strong dendrite, we can change the battery cell to repair its life time. It's really simple for the experts. Personally speaking, it should be done under the professional officers. Otherwise, you will ruin your laptop battery. This is not kidding if you want a good laptop battery.