Can You Use Lower Watt Laptop Charger. If the system can accept the higher wattage then you will find that the battery charges faster -- and some systems will accept higher wattage than is provided by the AC adapters they actually shipped with. It was a 65 watt hp charger like the one you describe.
When you use a lower wattage charger the voltage regulator inside of the motherboard adjusts the voltage in the current to match with the requirements of the internal components of your laptop. This doesnt apply to the iPad Pro 12 model requires a 12W charger. Using a higher wattage charger is perfectly safe.
For example if you have a 90W laptop but you use a 45W charger to charge it then it wont get the power it requires and may not function at its best.
Watts W is the product of Volts V and Amps A. The universal power supply has circuitry to adjust the voltage to the. Just got a Lenovo Y740 and the laptop charger is massive on an otherwise very portable device. In my personal knowledge as physics bachelor and experience.
