90P5026 - Lenovo 90-Watts 20 Volt AC Adapter for ThinkPad T60, R60, Z60 without Power Cord

Here are the technical specifications for the Lenovo 90P5026 AC Adapter:

1. Input Voltage: AC 100-240V
2. Output Voltage: DC 20V
3. Output Current: 4.5A
4. Power Capacity: 90W
5. Connector Size: 7.9mm x 5.5mm
6. Compatibility: ThinkPad T60, R60, Z60
7. Efficiency: 85% typical
8. Operating Temperature: 0°C to 40°C
9. Storage Temperature: -20°C to 85°C
10. Humidity: 5% to 95% non-condensing
11. Over Voltage Protection: Yes
12. Short Circuit Protection: Yes

Helpful Notes:
1. This AC adapter does not come with a power cord, so make sure to purchase one separately.
2. The 7.9mm x 5.5mm connector size is a common size for Lenovo laptops, but make sure to check your laptop's compatibility before purchasing.
3. The 85% typical efficiency rating means that this adapter is energy-efficient and will help save on your electricity bill.