external power supply for gsm shield sim 900

can anyone tell me do i need external power for gsm shield sim 900? if yes then how much ?

can anyone tell me do i need external power for gsm shield sim 900? if yes then how much ?

can anyone tell me do i need external power for gsm shield sim 900? if yes then how much ?

Please don't crosspost.

According to the datasheet, the SIM900 has a peak current draw of 2 Amps.

Please don't post the same question in multiple forums.

Thanks Moderator

This is the appropriate section for your question. Your other posts have been removed. You will receive a time-out if you cross-post again.

Per the schematic, it appears the device gets its 5V/Gnd from the Arduino power header. Maybe I am misreading that; I don't see any obvious external power connections tho.