AC adapter Lenovo SA10M42771 20V 2.25A power supply for Lenovo devices

Lenovo SA10M42771 AC adapter supplies regulated 20V DC at 2.25A for compatible Lenovo laptops and devices. This compact, single-output power supply is designed as a replacement or spare unit to maintain device operation and charge batteries where supported. The adapter features a standard form factor suitable for everyday use at home, in the office, or on the move, and is intended to match the power requirements of devices that accept a 20V/2.25A input.

Advantages

The adapter delivers a stable 20V output at 2.25A to ensure consistent device operation and reduce the risk of undervoltage-related shutdowns. Its compact design and moderate weight make it convenient to carry with a laptop or store in a bag. The power supply includes standard safety and regulation features to protect connected devices from basic electrical faults during normal use. It is suitable as a direct replacement for original equipment when the original adapter is lost, damaged, or when an additional unit is needed for travel or a second workspace.

Suitable for

• Powering compatible Lenovo laptops and portable devices that require 20V and up to 2.25A
• Use as a replacement adapter when the original is unavailable or faulty
• Keeping as a spare unit for travel, office, or home to ensure uninterrupted device use

Key specifications

• Output voltage: 20V DC
• Output current: 2.25A
• Output power: 45W (nominal)
• Connector type: manufacturer-specific barrel/plug compatible with supported Lenovo devices
• Input: AC mains input, universal range compatible with common voltages (check local mains specifications before use)
• Form factor: compact external AC adapter with attached cable

How to use

Connect the adapter to an appropriate AC mains outlet using the supplied or compatible mains lead, then insert the output connector into the device's power input jack. Ensure the device accepts a 20V/2.25A input before connecting; consult the device label or user manual for compatible power specifications. After connecting, verify that the device indicates charging or external power; monitor for any unusual heat or smell during first use. Disconnect the adapter from the mains and device when not in use or during extended storage.

Recommendations

Use the adapter in dry, well-ventilated conditions and avoid covering it during operation to prevent overheating. Do not use if the cable, plug, or housing is damaged. For optimal device longevity, match the adapter output to the device's required voltage and current range and follow manufacturer guidelines for charging and power management.