# Laptop Charger Compatibility Checker

Check whether a replacement charger matches your laptop's voltage, power, connector and polarity before you buy.

- URL: https://toolstackhub.co.uk/tools/laptop-charger-compatibility-checker/
- Category: Calculators
- Price: free, no sign-up
- Privacy: runs in the browser; input is not uploaded
- Last updated: 2026-10-08

## About
Read the small print on your original charger (output volts and amps or watts, connector type and tip polarity) and enter the details of the replacement. The checker compares them against the rules for safe charging: the voltage must match for a fixed-voltage charger, the power should be at least as high, and the connector and polarity must be identical. For USB-C Power Delivery chargers, enter the voltages the charger supports. This is a guide only; check the laptop maker's guidance for your exact model.

## How to use
1. Enter your values in the fields above.
2. The result updates automatically as you type.
3. Copy or note the figures you need.

## FAQ
**Can I use a charger with a higher wattage?** Usually yes. The laptop only draws the power it needs, provided the voltage, connector and polarity match. Never use a lower-wattage charger for a demanding laptop.

**Can I charge my laptop with USB-C?** Only if the laptop has a USB-C port that supports charging. The charger must offer a voltage the laptop accepts and enough power; many laptops need 45 to 100 W.

**Is the Laptop Charger Compatibility Checker free?** Yes, with no sign-up or limits.