Laptop AC adapter Lenovo ThinkPad X1 Carbon 20V 4.5A 90W power supply (FRU45N0334)

AC adapter for Lenovo ThinkPad X1 Carbon supplying 20V at 4.5A (90W) output. This compact power supply is designed as a replacement or spare for the X1 Carbon series, providing the required voltage and current to charge the battery and power the laptop during operation. The unit features a travel-friendly form factor and delivers stable output suitable for everyday use and mobile work.

Advantages

The adapter provides regulated 20V/4.5A output to ensure consistent charging and system stability under typical load. Its 90W power rating supports sustained performance during processor- and graphics-intensive tasks. The compact design reduces bulk for transport and easy storage in laptop bags. Built-in protection against overcurrent, overvoltage and short-circuit conditions helps protect the laptop and battery from common power faults.

Suitable for

• Lenovo ThinkPad X1 Carbon series laptops requiring a 20V 4.5A (90W) power source
• Use as a replacement or spare power supply for business travel and remote work
• Charging on the go and powering the laptop during prolonged office or field sessions

Key specifications

• Output voltage: 20V DC
• Output current: 4.5A
• Maximum power: 90W
• Connector type: laptop power plug compatible with Lenovo X1 Carbon
• Form factor: compact, travel-friendly adapter brick with detachable cable
• Protection features: overcurrent, overvoltage and short-circuit protection

How to use

Connect the adapter output plug to the laptop power input and plug the AC mains cable into a properly rated wall outlet. Ensure the laptop is powered off or in a low-activity state when first connecting if you want to minimize initial power draw. The adapter will provide stable 20V/4.5A power for charging the internal battery and running the system. Disconnect the adapter by first unplugging the AC cable from the wall, then removing the output plug from the laptop.

Recommendations

Use the adapter with laptops specified for 20V and up to 4.5A input to avoid under- or over-powering the device. Avoid exposing the adapter to moisture, extreme temperatures, or physical damage. For optimal longevity, store the adapter in a dry environment and avoid continuous operation at maximum rated temperature. If the adapter becomes excessively hot, emits unusual noise, or shows visible damage, discontinue use and replace it.