jerryc41 Loc: Catskill Mts of NY

Although you might have the right plug on that other charger, using one with lower wattage will probable make your laptop run slower. "Watts Important!"

http://www.howtogeek.com/244726/can-using-the-wrong-power-supply-slow-down-a-laptop/

lev29 Loc: Born and living in MA.

Thanks for posting (= TFP!)

heyrob Loc: Western Washington

Wattage is important for other reasons too, having a power supply with a higher wattage rating than required is no issue, some people think if the item needs a 1/2 watt power supply, that a 1 watt will harm their equipment, but that's not true. The rating is simply what the charger is able to deliver, it doesn't push through more than needed. The opposite is a problem though, if your device needs 1 watt and you only use a 1/2 watt supply then you are over taxing the charger and it can create a fire hazard because the charger could overheat if not thermally protected.

jerryc41 Loc: Catskill Mts of NY

Right. Leading a horse to water is a good analogy. It will take what it needs, but it won't be happy if there isn't enough.