I bought a car adapter charger with two USB ports for charging iPhone 5s and iPad 4 in my car. The charger has a rating of 3.1 AMPS. I assume if the two are connected at the same time the 3.1 AMP is divided equally until one or the other is charged, then the full 3.1 AMPs would go to the remaining port! WOuld tht be ok if you dont leave it on for extended period of time? I would try to disconnect as soon as charged!
Oh, God, is this starting over again? The "expert" in the Apple store apparently knows NOTHING about electricity or how it works. He is making it up as he goes along. There is no way an iPad charger can "detect" what is connected to it. ANY device draws as much current as it needs. No more. No matter how much is available. Your house probably has 150 amp service. One 60 watt light bulb (conventional) requires 0.5 amps. A computer requires typically 3 amps. If the current available is what goes to each device then every light bulb and piece of electronics in your house would instantly explode the moment you turned on the main circuit breaker. Current NEVER gets FORCED; it gets drawn to meet a need. It is such a shame that basic electricity no longer appears to be taught in middle school Science class. Or were you too busy texting to pay attention?
For the other thread you are referring to I tested a number of USB adapters using a USB power meter (this one: http://www.amazon.com/Centech-USB-Power-Meter/dp/B00DAR4ITE/ref=sr_1_cc_1?s=aps& ie=UTF8&qid=1400794264&sr=1-1-catcorr&keywords=century+usb+power+meter), not just Apple's adapters. I tried adapters up to 5 amps. For EVERY SINGLE ONE OF THEM the iPhone drew 1.0 amps or less.
Stop spreading misinformation. The ONLY requirement for a USB adapter (don't call it a "charger"; it isn't - it is a 5 volt source with a USB output) to charge an iPhone is that it is reasonably high quality and has a "clean" output.
Gregory Lazarchik wrote:
After some thought your comment really doesn't end the discussion. Yes the battery willl draw current it needs but it is a function of rate. A fully discharged battery will draw at whatever amps are provided until its voltage approaches the charging source at which point it will gradually slow down to a trickle. THe problem is heat. LiPo batteries have ratings and some can take a fast charge and some cannot. Normally with the 10 W charger it takes several hours to charge an iPad and with the iPhone apple suipplies a 5W charger. I am wondering,since the 3 amp charger will charge the battery much faster and generate heat, if the battery and the equipment can take it?
You're not an electrician may I assume.
excuse those typos....wouldn't a current limiting device get hot?
No
Explain please from a thermodynamic point of view, why the iPhone5s gets hot and charges in much less time on the 3 amp adapter than when on the apple 1 amp adapter.
well yes and no, amps are kind of reserved characters, but when ur talking about pushing 310 amps at 5 volts to a cell phone...get ready for fireworks, it Will NOT end well i can promise u that lol
Once again, current is NOT 'pushed'
Is a 3.1 AMP Charger OK for iPhone and iPad?
