# Measuring current with multimeter

I have to measure the current of a battery of 3.7 volt(used in HP IPAQ VM) and I am connection a resistor of 10 ohms in series with multimeter and the battery. Since the actual current of battery is 1.26 amps (1260 mA) but the meter shows only 0.37 amps.

How to measure actual current of source using multimeter?

Your meter is correct. With a 3.7 V battery and a 10 ohm resistor, Ohm's law ($V = I\cdot R$) tells you that the current should be 0.37 A.
The 1260 mA you mentioned is probably 1260 mAh (milliamp hours). This tells you the capacity of the battery, not the current draw. For example, if you drew 100 mA from the battery continuously, it would last 1260 mAh / 100 mA = 12.6 hours.