Yes – I do it all the time — If you’re still using SLA batteries, Go with Lithium — If you have the capability ,build a battery pack — My grandkids have PowerWheels that run 18v and 24v – We also have Razor scooters the same way — I have one Razor 36V converted , does 28mph

What is the voltage of the Huffy and the size of the battery/ compartment

One of the easiest conversions is to use Tool Battery Packs – they sell the adapter plates