extended vs charge battery -Is there a dif??

[ladyandroid]

Android Land:
Need some help with the following:

- extended battery vs recharger are they the same? It looks like they are or am I wrong.

- what do all these numbers represent? amh or mah? any website out there that explains this?

- what should I look at in my phone so that I am choosing the right one. I have a Samsung galaxy express (AT&t) and have a Samsung galaxy tab 2.

I would like to extend the battery if I run out when traveling. Also do I need to look at some rating? As you can see I have read some posts but still confused and appreciate any info for educational purposes.
I also want to be able to use the phone when I attach the extended or rechargeable battery.

Important - want to make sure I get something that does NOT overcharge as well.

Thanks!
ladyandroid

 

[chanchan05]

Extended battery is basically a higher capacity battery. Think of the phone as a car, and the battery as the gas tank. Basically getting an extended battery is swapping out your old gas tank for a bigger one so it doesn't run out as fast. Getting a recharger is like bringing a few containers of fuel. When you are almost out, you refill on the go.

Mah is the capacity rating of the battery. Basically more mah, the more juice it has.

 

[funkylogik]

^^ excellent metaphor :beer: