Power adapter Lenovo 20V 4.5A model 36200250 — replacement laptop AC adapter

The Lenovo 20V 4.5A model 36200250 replacement laptop AC adapter provides a stable 20-volt DC output with a maximum current of 4.5 amps for compatible Lenovo notebooks. This external mains adapter is intended as a replacement or spare charger to power the laptop and maintain battery charging. The compact design connects to standard AC mains and supplies regulated power to the notebook via the appropriate barrel connector. It is suitable for use at home, in the office or while travelling where a reliable, consistent power source is required.

Advantages

This Lenovo replacement adapter delivers a consistent 20V/4.5A output designed to match the charging requirements of compatible laptops, helping ensure stable system operation and battery charging. The adapter's compact external housing reduces bulk and is easier to carry than larger power bricks. Built-in protection features provide safeguards against overcurrent, overvoltage and short-circuit conditions to protect both the adapter and the connected laptop. The product is a direct replacement option where original manufacturer power specifications match.

Suitable for

• Replacing a lost or damaged Lenovo laptop charger that requires 20V, 4.5A power
• Carrying as a spare charger for travel or remote work
• Providing stable power for office work, home use or presentations
• Powering a laptop during battery maintenance or prolonged use

Key specifications

• Output voltage: 20 V DC
• Maximum output current: 4.5 A
• Output power: 90 W (nominal)
• Input voltage: universal AC input (typically 100–240 V AC, 50/60 Hz)
• Connector type: barrel-style DC connector compatible with specified Lenovo models
• Form factor: compact external adapter housing
• Protection: overcurrent, overvoltage and short-circuit protection

How to use

Connect the adapter to an appropriate AC mains outlet using the supplied or compatible mains lead. Insert the adapter's DC barrel connector firmly into the laptop power socket until it seats securely. Verify that the laptop indicates charging or that the power LED illuminates. When disconnecting, pull the connector straight out without twisting. Unplug the mains lead from the wall if the adapter will not be used for an extended period. Use the adapter only with laptops that support a 20V, 4.5A input and the matching connector type.

Recommendations

Use the adapter in a well-ventilated area and avoid covering it during operation to prevent overheating. Ensure the connector polarity and voltage match the laptop's requirements before connecting. If the laptop does not show charging after connection, check the mains outlet, cable connections and the laptop charging port. Replace the adapter if visible damage to the cable, connector or housing is present. Store the adapter in a dry environment and avoid exposure to liquids and extreme temperatures.