Hi

You mean amps, not volts. All USB chargers work at the same voltage.(about 5v) There should be no problem using a higher (amp output) rated charger with the note2 - it will draw what it can take (depends on the resistance of the charging circuit). If the charger is less than 2amp capacity, the phone wont charge as fast as it could. I tend to use 1amp rated HTC car chargers which I have as a result of my old phone.

Roger

 

I would buy a Samsung car charger (USB output 5V/2A) like ...
http://m.samsung.com/uk/consumer/mobile-devices/tablets/accessories/ECA-P10CBECSTD

... (for a Samsung tab) and would use the microUSB cable which came with the phone.

Harry

 

You can buy a tomtom car charger that had 2 USB outputs, one of which I believe is 2amps @5v. That's what I use and have no problems. Even use a HTC angled micro USB lead with it

 

There are even some 3.1A dual usb car chargers on amazon that are less expensive than this.

I opted for a 4.2amp off ebay and it's been working fine (although, part of me thinks that it's not truly 4.2amp.

 

Verizon dual port with the front that looks square-ish.

Got my 25% discount and VZW cares for me if there are any issues. I get full charging, and I can plug in a micro usb cable if anyone needs an extra plug. Full 2.1 Amp, aka fast charging. When you touch the micro-usb end it has an LED that lights up, too.... huge extra bonus in the dark!

 

And here's another 3.1 for cheap:
Amazon.com: iPhone 5 Car Charger - Lightning Connector: Cell Phones & Accessories