Brettmm92 wrote:
I'm not sure what you mean about a 12 volt to usb adapter. Are you talking about the thing that sticks into a cigarette lighter and has a female usb on it? If not could you send a picture of what you mean?
And wouldn't I need a power inverter to use the adapter? I'm assuming that they can't just be easily hooked on a battery, or can they?
And I bought the 10 amp kit but can easily cancel it on amazon as it probably won't ship until Monday

Plug into ANY 12V cig/power ports.
If you do not have a 12V Cig/power port available, you CAN add one easily or one add one of these..

Which you simply wire to your 12V battery..
Or you can add one of these..

Which gives you not only a USB charger but a 12V power port along side it, just simply wire to your 12V battery.
All of these solutions are much more efficient than using a 12V to 120V inverter then a 120V to 5V USB charger.
The best of all the top pix is the cheapest at about $5 and the most expensive is the last pix at about $15. Much cheaper than buying any 12V to 120V inverter.
Each time you do a voltage conversion there is a loss of energy which creates heat and uses more battery than it should, the idea is to minimize the amount of times you must "convert" the voltage.
Eliminating the inverter step will save considerable amount of battery power making your camping experience go a bit further. This is especially true when dealing with very small current draw items like charging a cellphone.