IBM/Lenovo 16V 4.5A (72W) power adapter with a 5.5mm x 2.5mm barrel tip

Device Type: Laptop AC-to-DC Adapter / Power Supply
Compatibility: IBM/Lenovo ThinkPad
Input: 100-240V AC, 50/60Hz
Output: 16V DC, 4.5A
Output Power: 72W
Connector Type: Round Barrel Tip, 5.5mm (Outer) x 2.5mm (Inner)
Key Specs: AC-to-DC Adapter, 16V 4.5A 72W Output, 5.5 x 2.5mm Round Pin, Universal AC Input, Replacement for IBM/Lenovo Laptop Chargers
Usage: Laptop Power & Charging, Legacy IBM ThinkPad Replacement, Office/Home Use