Question about 24W wall adapter

im buying a 24W wall charger adapter from Anker for my iPhone 6, and I'm wondering if it will charge fast but not damage my phone battery at all? Cause it's a big change for wall adapter watts for me.

iPhone 6

Posted on Aug 7, 2016 10:27 PM

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10 replies

Aug 7, 2016 11:05 PM in response to gbro10

The wattage is only relevant if it's too little to supply the battery. It may well charge the battery faster, but that does not damage the battery as long as the battery is not overcharged. Just be sure the charger has overcharge protection.


Note that using a non-Apple charger outside of Apple specs could void the warranty if the device becomes damaged.

Aug 7, 2016 11:21 PM in response to gbro10

That is what I am saying. However, a caveat is that not all L-Ion batteries can be rapidly charged, so you should be sure to keep an eye on the battery condition just in case. I cannot recommend that you use any non-Apple charger with your Apple devices nor use anything that is non-Apple approved or not constrained to Apple's specs. Apple's warranty makes it quite clear that doing so can void the warranty.


If Anker certifies the charger can be used with an iPhone, then you can accept their assurances. They are reliable.

Aug 8, 2016 5:20 PM in response to gbro10

All iPhones through the 5S would charge at 1 amp (5 watts) regardless of the capacity of the power source. However, the 6 and later can charge at 1.5 amps (7.5) watts if the power source can supply at least 7.5 watts - even though the phone ships with a 5 watt adapter. It will only do this through 75% state of charge; after that the charging current is gradually reduced to prevent overcharging, and all charging stops at 100%. Because of the tapering charge current a higher capacity adapter will only shorten the charge time by a small amount (perhaps by 15 minutes), so it doesn't much matter which you use unless 15 minutes is important to you.

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Question about 24W wall adapter

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