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Is it OK to use the same charger for an iPad 4 and iPhone 5?

Is it OK to use the same charger for an iPad 4 and iPhone 5? I'm not going to melt my iPhone am I? :p

Most Useful Answer ascen  Apr. 10, 2013 at 23:40

It is fine to use an ipad charger and will not shorten the iphone batteries life.

The difference between the chargers is simply the wattage - in other words the maximum juice the charger can spit out, not the actual amount it actually spits out. The output voltage and amps are identical as per standards defined by the USB standard.

iPads need a higher wattage power supply simply because if it used the same charger as an iPhone (with a lower wattage) it would take excessively long to charge. The iphone will happily work on a higher wattage power supply but will only suck the power down at a rate that its internal power charging electronics will allow - never more. LiPo batteries, that both devices use, need somewhat intelligent circutry within the iphone or ipad to control the way it charges the battery the best way to ensure a long battery life. This same circutry prevents the battery of an iphone when being charged by a higher (like the ipad charger) or lower rated wattage power supply damaging the battery and impacting battery life.

In other words, the power charging circutry on the device controls battery charging, and using higher wattage supplies (which only defines the *maximum* wattage the power supply can handle - not the *actual* amount it sends to the device) is never a problem.

I've intentionally used laymans terms to explain it simply to make it easy to understand.

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2 comments

JanSt / MOD  Apr. 10, 2013 at 21:48

2 schools of Apple think: 1 says it's okay. Always. Fullstop. Others say it's okay now and again, but to constantly use the iPad charger would shorten your phone's battery lifetime...

ascen  Apr. 10, 2013 at 23:40

It is fine to use an ipad charger and will not shorten the iphone batteries life.

The difference between the chargers is simply the wattage - in other words the maximum juice the charger can spit out, not the actual amount it actually spits out. The output voltage and amps are identical as per standards defined by the USB standard.

iPads need a higher wattage power supply simply because if it used the same charger as an iPhone (with a lower wattage) it would take excessively long to charge. The iphone will happily work on a higher wattage power supply but will only suck the power down at a rate that its internal power charging electronics will allow - never more. LiPo batteries, that both devices use, need somewhat intelligent circutry within the iphone or ipad to control the way it charges the battery the best way to ensure a long battery life. This same circutry prevents the battery of an iphone when being charged by a higher (like the ipad charger) or lower rated wattage power supply damaging the battery and impacting battery life.

In other words, the power charging circutry on the device controls battery charging, and using higher wattage supplies (which only defines the *maximum* wattage the power supply can handle - not the *actual* amount it sends to the device) is never a problem.

I've intentionally used laymans terms to explain it simply to make it easy to understand.

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