Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Overview

The Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W is designed to provide stable AC power and battery charging for compatible Lenovo ThinkPad Edge E520 laptops. With a 20V, 4.5A output and 90W maximum power rating, it provides the power level required by the E520 while maintaining dependable performance during everyday computing.

The adapter supports a 100–240V AC input range at 50–60Hz, making it suitable for different electrical environments. Its compatible Lenovo square-tip connector provides a secure connection for supported ThinkPad Edge E520 systems.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Price Table

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Key Specifications

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Electrical Output Specifications

The adapter provides a regulated 20V DC output at up to 4.5A, giving the ThinkPad Edge E520 a maximum power capacity of 90W. This rating is suitable for compatible E520 configurations and provides continuous power for normal laptop operation and battery charging.

Output Voltage

• Delivers 20V DC output.
• Designed for compatible Lenovo ThinkPad Edge E520 systems.
• Provides stable power for laptop operation and charging.

Output Current

• Provides up to 4.5A.
• Supports the 90W power requirement of compatible E520 configurations.
• Helps maintain consistent power delivery during everyday use.

Maximum Power

• Maximum output is 90W.
• Calculated from 20V × 4.5A.
• Suitable for the Lenovo ThinkPad Edge E520 90W charging category.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Common Wattage Tiers & Use Cases

65W

• Used with selected lower-power Lenovo laptops.
• Suitable for systems requiring lower power output.
• Not the specified 90W rating for this E520 adapter.

90W

• Designed for compatible Lenovo ThinkPad systems such as the E520.
• Provides 20V and 4.5A output.
• This adapter belongs to the 90W category.

135W

• Used by selected higher-power Lenovo notebooks.
• Provides more power than the specified E520 90W adapter.
• Should only be used when the laptop's electrical requirements support it.

170W

• Commonly associated with higher-performance Lenovo systems.
• Not required for the standard 90W E520 configuration.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Input Specifications

Input Voltage

• Accepts 100V–240V AC.
• Supports different mains voltage standards.
• Suitable for use with compatible electrical outlets.

Input Frequency

• Supports 50Hz–60Hz.
• Compatible with standard international AC power systems.

Power Source

• Connects to a standard AC wall outlet.
• Converts AC input into regulated 20V DC laptop power.
• Provides continuous power for compatible ThinkPad Edge E520 systems.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Connector Types

Lenovo Square Tip

• Uses a Lenovo-style square-tip connector with a center pin.
• Common compatible specifications are approximately 7.9mm × 5.5mm.
• Designed for compatible ThinkPad Edge E520 models.

USB-C

• Not the connector used by the standard 90W E520 adapter.
• USB-C Power Delivery chargers should not be substituted unless the laptop specifically supports USB-C charging.

Round Barrel

• Different from the square-tip connector used by this adapter.
• Connector size and polarity should always be checked before purchasing a replacement.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W FAQs

1. What is the output of this Lenovo E520 adapter?

The adapter provides 20V DC at 4.5A, with a maximum output of 90W.

2. Is this adapter compatible with the ThinkPad Edge E520?

Yes, a 20V/4.5A/90W adapter is suitable for compatible Lenovo ThinkPad Edge E520 Type 1143 systems. Always verify the connector and electrical rating against the original adapter.

3. What connector does the E520 use?

Compatible 90W E520 adapters commonly use a 7.9mm × 5.5mm Lenovo square-tip connector with a center pin.

4. Can I use this adapter internationally?

Yes. The adapter supports 100–240V AC and 50–60Hz, making it suitable for different mains systems.

5. Is the power cord included?

The package can include an AC power cord together with the adapter. Package contents may vary by seller.

6. Can I use a 65W adapter instead?

A lower-wattage adapter may not provide sufficient power for every E520 configuration. For a system specified for 90W, use an adapter matching the required 20V/4.5A/90W rating.

Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W Conclusion

The Adapter for Lenovo ThinkPad Edge E520 1143-BNU 20V 4.5A 90W provides reliable power for compatible Lenovo ThinkPad Edge E520 laptops. With 20V output, 4.5A current, 90W maximum power, 100–240V AC input, and a compatible Lenovo square-tip connector, it is a practical replacement or spare adapter for everyday laptop charging and operation.