The ThinkPad External Battery Charger gives you maximum power flexibility. You can recharge batteries for your Z Series ThinkPad notebooks without your ThinkPad system. Convenience and flexible operation are enhanced with charged batteries that are ready to go when you are. Features & Benefits: • External unit frees up your ThinkPad notebook so you can continue to work off the system battery while charging a spare battery to increase your unplugged mobile computing time. • Requires the use of the ThinkPad 90W AC Adapter that comes with your ThinkPad Z Series notebooks. General Part Number: 40Y7625 Description: ThinkPad External Battery Charger Characteristics Power adapter type: Input voltage: -- Output voltage: -- Form factor: Connector: Cable length (m): -- Power (Watts): -- Battery technology: Battery voltage: -- Battery intelligence: Other Information: -- Compatibility Restrictions: Hardware prerequisites:System Units _ IBM Systems: _ Non-IBM systems: Operating system requirements: Adapters: Mounting kit etc.: Supported software: Product approvals/certifications4: UL60950 third edition, VCCI, C-Tick, C-UL C22.2 No. 950, CE MARK Energy Star Compliant: Warranty 3 Limited Warranty period and type: One year Customer Replaceable Unit Weight & Dimensions 6 Weight: .25Kg Height: 31mm Width: 91mm Depth: 161mm