What charger speed should I use?
Generally, smaller laptops will charge at lower speeds, and larger laptops require higher speeds to charge correctly. Some exceptions apply (for example, higher-spec models), so you should check the specifications for your device to ensure you’re supplying the correct amount of power. You should also ensure you are using a cable rated for the correct speed (such as 60W or 100W).
Wattages shown below are a general guide only, always check power and cable requirements for your device