Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

I am trying to make a transportable charger for iPhones, but before I can start this I need to know how much power my iPhone uses when I make an emergency call.

If nobody knows this, I will be glad to have any information related to this.

share|improve this question
add comment

2 Answers

Anandtech has some nice charts detailing the wattage of the iPhone 4S running various apps, which could be a good starting point for you.

You may also want to check out existing kits/projects, such as MintyBoost - they seem to work reasonably well with iPhones. There's a specific MintyBoost page detailing Apple device charging that may also yield some useful info.

share|improve this answer
1  
+1 for the mintyboost link. Explains things very well –  Roddy Jun 14 '12 at 9:15
add comment

The power use is going to vary somewhat depending on external factors on the RF side. Network mode in use (GSM/3G) and the power required to establish a stable connection to the cell site in use together with any other usage on the device (speaker/bluetooth/GPS)

Best guess is that your baseline should be the specified 1A required to charge the device and work up/down from there with a meter connected

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.