Hi
I own a laptop repair company in the UK...
NOOOOOO !!!
Higher is NOT OK, not unless you want a burnt out charging system or motherboard...
You NEED the correct Voltage and wattage, amperage does not matter if its more , but the other 2 do...
Get the CORRECT charger or its going to be a VERY expensive mistake....(ever seen a laptop with smoke pouring out of the charging hole ?? I have many times when customers demonstrated their "new charger" that they bought really cheaply on Ebay)
All the best Brett