The 8-cell ThinkPad battery 78++ is a replacement/spare battery for P70 systems. The battery is rechargeable and can be used as a replacement or as a convenient spare for mobile workstation ThinkPad P70 systems. This battery is powered by Lithium-ion technology and has a safeguard chip which authenticates with Lenovo systems. The battery lasts on average 96 Watt-hours and utilises over-discharge protection to ensure a secure flow of power. Many factors affect battery life. These include: screen brightness, battery conditioning, features, applications, power management and other customer preferences.Lithium-Ion (Li-Ion) technology 8 cell system battery Over-discharge protection to prolong the life of the battery Battery energy (Watt-hours): 96 Wh Battery Safeguard chip authenticates with Lenovo systems