Good point about having a small 12V power inverter for the car.
A couple things to consider.
If you intend to use it to recharge laptops, or other
lithium Ion battery devices, be sure to spend a bit more
and get a “Pure Sine Wave” version. The modified
sine wave inverters are MUCH harder on rechargeable
batteries, and can ruin them in short order.
Also, if you want to be able to plug it into your normal
12 volt accessory socket, 150 Watts is likely the maximum
inverter size you will be able to run that way. Larger units
can be connected directly to your car battery. 80 to 100
watt units will work with most lower power accessory plugs.
A 10 amp accessory socket only gets you around 120 watts.
For charging devices that can be charged from USB ports,
there are many quality charging accessory plugs that plug
into your car’s 12 volt socket, and provide a couple good
smart USB charging ports. Look for the “Smart” ones that
can do 2.1, or 2.4 Amps in both ports at once.
Bttt