- Lithium-ion (Li-ion) technology
- 6-cell system battery
- Over-discharge protection to prolong the life of the battery
- Battery safeguard chip authenticates with Lenovo systems
The 6-cell ThinkPad battery 57+ is a replacement/spare battery for W541, W540, T440p, T540p, W540, L440 and L540 systems. The battery is rechargeable and can be used as replacement or as a convenient spare for several popular ThinkPad systems. This battery is powered by Lithium-Ion technology and has a safeguard chip which authenticates with Lenovo systems. The battery lasts on average 57 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.