How to Test Your Wireless & AC Chargers [Android 5.0+]Full Tutorial: http://gadgethacks.com/how-to/are-your-chargers-faulty-slow-heres-test-them-android-0159 LotusPilot. Most models of iPad require a Power Adapter rated at 10-12W (i.e., 2.0-2.4A @5V) or greater to reliably charge. 5W Power Adapters (or some power-strips) intended for charging mobile phones (e.g., iPhone) are inadequate to charge an iPad; if the iPad charges at all, charging will be unreliable or very slow. A basic question about amps, watts, and charging batteries. Why do we speak of watts (and not amps) when we refer, for example, to the "7.5W Wireless Charger for iPhones," but when we talk about cord-based USB charging, the specs typically refer to amps (and not watts). For example, one page explains that the "USB spec is 500 mA maximum current. You can use the 12W charger with iPhone 7 Plus. It will charge it much faster than a stock 5W charger. I have iPhone 7 Plus myself and using 12W charger all the time. I measured many chargers and stopped on original Apple 12W iPad charger. Works the best for me. You can measure the charge on your own phone with a free app - Amperes Lite. Find a wireless charger that fits your style. Don't fret too much over matching the exact specifications for your phone. Wireless charging---even at the fastest speeds---is always slower than wired charging. The best time to use a wireless charger is overnight or during the workday when you don't need a quick juice up. Breaker size (in amps) = Charger power rating (in watts) / Electrical voltage (in volts) For example, if your Tesla charger has a power rating of 14.4 kW and the electrical system operates at 240 volts, the calculation would be: Breaker size = 14,400 W / 240 V = 60 amps. In this scenario, a 60-amp breaker would be suitable for your charger. .

how many amps to charge iphone