A charger has to match in three places: voltage (19 V, 20 V), power in watts and the size of the tip. Too weak a unit charges slowly or cannot keep up under load at all, so a 45-watt adapter will not do for a 90-watt computer. The numbers you need are printed on the old unit. Besides wall adapters there is an Akyga car charger that runs from a vehicle socket.
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A charger has to match in three places: voltage (19 V, 20 V), power in watts and the size of the tip. Too weak a unit charges slowly or cannot keep up under load at all, so a 45-watt adapter will not do for a 90-watt computer. The numbers you need are printed on the old unit. Besides wall adapters there is an Akyga car charger that runs from a vehicle socket.