Hi Akichow,
I use a Morphie case/backup battery with my iPhone. Their instructions suggest only charging the iPhone up to 75%. Their position is that it takes disproportionally more power to get the last 25%. I have not tried to "test" this, but I'm inclined to believe it.
One iPhone power saving option that you may not be aware of:
- You can turn off the cell service, without going into airplane mode. Simply activate the SIM PIN (found under settings>phone>SIM PIN). Then, turn your iPhone off. Now, whenever you turn your phone on, you will need to enter the SIM PIN if you want the phone to work. Simply do not enter the SIM PIN, and the other functions will work, but no cell service or "searching". The default PIN for the SIM card is: 1111 Be cautions with this, you are only allowed three attempts to enter this PIN. I "guess" if you fail, you will need to visit the genius bar.
