Differences in battery information and phones printed labels I just run across this today:
The value for battery current capacity printed on the battery of some Samsung Android devices are different than the numbers printed on the label on the phone (underneath the battery).
I tested 4 models (Galaxy S3, Galaxy S4, Galaxy Note II and Galaxy Pocket); The only consistent one was S3 (Phone label was 2100mA and battery was 2100mAh)
On S4, battery is 2600mAh, but the printed label is like this:


  RATED : 3.8 V ... 1300 mA


What's the difference between these two numbers and why on some phones these two values are not equal? Thanks in advance
mA is not the same as mAh. The former is a current rating, and the latter is the capacity of the battery. 1000 mAh means the battery can supply a current of 1000 mA (at its rated voltage) for 1 hour, or equivalently, a current of 500 mA for 2 hours, etc. It tells you how much energy the battery can hold.

The number in mA printed on the phone tells you how much current the phone can draw. It's like a safety rating, though I suspect the numbers are somewhat made-up for phones: it would be very unusual for the phone to actually draw that much current, and most of the time the amount drawn will be much less.

There's no reason for those two numbers to be the same.