Inverter for charging laptop???

I always use a surge protector for all electronic equipment.

 

Yep.

 

Power surges off an inverter are probably not going to happen. It's the voltage drops when you crank the engine and when the batteries get run down overnight and can't supply decent voltage to the inverter that's going to cause havoc on the motherboard and hd's. The output ac voltage is directly proportional to the input dc voltage.

At least with a dc to dc adapter, the problems aren't amplified as much.

 

Nothing to worry about.
Modern laptop charger has AC rectifier on input side and ranged for 85 -265 volts then DC converts to high frequency (25 -35 Kilo Hertz) to step down to 18 volts and another rectifier.
PMP9208 65W (130W Surge) Flyback Power Supply for Laptop Adapter Apps w/85-265VAC Input Reference Design | TI.com

 

I've had no issues running $20 140 watt invertors from Wal-Mart. Or $40 400 watts with tv.

As for toothbrush chargers. I buy the $5 battery operated toothbrushes. They last for the 6 week duration before throwing away for new brush. $5 EVERY 6 weeks seems worth it.

 

That's not too bad, it'd average out to 11 cents per tooth per week for using a battery powered toothbrush

 

What I want to know Dave? Is why the heck your doing it the hard way?
Get yourelf the 12 volt adapter and dont use the inverter! There is no need for the inverter for laptops. Amazon will sell you a power brick that you plug one end into the cigarrette lighter outlet and the other end goes into the laptop directly. It really is that simple. And it wont set you back more than $15 (shipping not included) or go to a local best buy and buy it directly.

 

Last i checked, laptops came with different plugs.

If i'm going to spend the money. I'll buy the invertor. It'll use the included laptop charger and anything else that needs 120 volts.

 

I dropped my hazmat. I think it's easy if you're familiar with everything but for those of us that never haul. Tough to remember.