How long can a 9v battery charge an iPhone?
Making a charger and I'm trying to fun it how many charges can I get off a 9v battery. Anyone know?
Anywhere from zilch to loads.
It all depends upon the charge capacity of the 9v battery and the efficiency of the conversion used to drop the voltage to the 5v required to do the job. It also depends upon which iPhone model and how much life the battery has left; different models have different charge capacities and over time the rechargeable batteries will gradually hold less charge than they did at their peak performance.
In short, you're asking a real "How long is a piece of string?" question.
- Why does the last percentage of my iphone battery takes so long to charge? I have noticed that the very first percentages (1-20) of the iphone battery charges very quickly, but when it comes to the last percentage (99-100) it takes like 15 minutes to charge!
- How long till I can receive text of a number I not long unblocked? I unblocked a number last night and no texts or calls that person send me are coming through to my phone does anyone know how long it will take befor I can receive text messages of that person… I have the iPhone 5 ios8
- How long does your iPhone 4S battery last and what can you do to make it last longer? My iPhone battery drains about 5 percent for 8 minutes and need to use it a lot. Any help please and thank you in advance.
- How long does it take a car battery charger to charge? I have a portable car battery charger. In order to use it on the car you need to charge it first. Its been hooked into the wall for 12 hours, there's a red light on, there's supposed to be a green light that appears next to it once its charged. No idea what type it is, doesn't say anything on it. How long should it take to charge so i can use it on my car?