Stay unplugged longer with these genuine ThinkPad batteries. These rechargeable batteries use Lithium-Ion technology and can be used as replacement for aging system batteries or as a convenient spare battery.• Lithium-Ionen-Technologie (Li-Ion) • 9-Zellen-Systemakku • Akkuenergie (Wattstunden): 94 Wh • Kompatibel mit dem externen Ladegerät von ThinkPad (40Y7625)