AC adapter Lenovo 20V 8.5A (model 5A10J75115) replacement power supply for compatible Lenovo laptops

This Lenovo AC adapter delivers a 20V, 8.5A output intended to power and charge compatible Lenovo laptops. Designed as a replacement or spare power supply, it restores charging capability for a device whose original adapter is lost, damaged, or unavailable. The adapter is suitable for routine use at home, in the office, or while travelling and provides stable voltage and current required by supported laptop models.

Advantages

The adapter provides a consistent 20V/8.5A output to match the power requirements of compatible Lenovo notebooks, ensuring reliable charging and operation under normal conditions. Its compact form factor and standard connector type make it easy to replace original adapters without modifying the laptop. The unit is intended for straightforward plug-and-play use and can serve as an extra adapter for multi-location setups or as a travel spare.

Suitable for

• Replacing a lost or damaged Lenovo laptop power adapter
• Keeping an extra adapter for travel or multiple working locations
• Providing a spare power supply for repair shops or IT support

Key specifications

• Output voltage: 20 V
• Output current: 8.5 A
• Power output: 170 W (nominal, calculated from voltage and current)
• Intended device type: compatible Lenovo portable computers
• Connection: standard laptop DC barrel or compatible connector for specified Lenovo models
• Operating environment: typical indoor use (home, office, travel)

How to use

Connect the AC adapter to a mains outlet using the supplied or compatible mains lead, then attach the DC connector to the laptop power inlet. Ensure the laptop is powered off or in a low-activity state during initial connection if recommended by the laptop manufacturer. When connected, the adapter provides charging and power; check the laptop’s charging indicator to confirm proper function. Disconnect the adapter by first unplugging from the laptop and then from the mains outlet when not in use.

Recommendations

Use the adapter in a well-ventilated area and avoid covering it during operation to prevent overheating. Verify that the laptop model is listed as compatible with a 20V/8.5A supply and inspect the connector for a secure fit before regular use. If you observe unusual heat, noise, or inconsistent charging, stop use and have the adapter inspected or replaced.