Battery in iPad is bigger than in MBP???

[alex00100]

I know people will be shouting how useless this thread is, but this is something truly shocked me a little.
Did you know that the tiny iPad 10.5 has about 20% more battery compared to the 15" Touch Bar MPB? Yet they are somehow supposed to deliver the same 10 hour battery life... Something tells me the folks in Cupertino are a little crazy

MBP 15" - 6700 mAh
iPad 10.5 - 8100 mAh

 

[Brookzy]

Amps does not equal power. Voltage must be taken into account.

Watt-hours are what needs to be compared.

And in this case:

• 10.5-inch iPad: 30.4 watt-hours
• 15-inch MacBook Pro (2016/7): 76 watt-hours.

 

[Adamantoise]

It's a problem when people come to the wrong conclusion simply because they don't understand how to interpret certain kinds of information.

This problem is pervasive in almost all aspects of life, most importantly politics and legislation.

 

[senttoschool]

It's a problem when people come to the wrong conclusion simply because they don't understand how to interpret certain kinds of information.

This problem is pervasive in almost all aspects of life, most importantly politics and legislation.

wtf?

 

[alex00100]

Amps does not equal power. Voltage must be taken into account.

Watt-hours are what needs to be compared.

And in this case:

• 10.5-inch iPad: 30.4 watt-hours
• 15-inch MacBook Pro (2016/7): 76 watt-hours.

So what does mAh mean then?

 

[Brookzy]

Amps does not equal power. Voltage must be taken into account.

Watt-hours are what needs to be compared.

And in this case:

• 10.5-inch iPad: 30.4 watt-hours
• 15-inch MacBook Pro (2016/7): 76 watt-hours.

[After double checking this it appears that the 10.5-inch iPad Pro actually has a 30.8 watt-hour battery - Apple's website is wrong.]

So what does mAh mean then?

mAh = milliampere-hour. It is a rating of what current the battery can provide for one hour at the rated voltage. So a 6,700 mAh battery could supply up to 6,700 milliamperes for an hour, or 3,350 milliamperes for two hours, or 13,400 milliamperes for half an hour, and so on.

Power (measured in watts) = current (measured in amperes, or milliamperes) × voltage (measured in volts).

The MacBook Pro runs at a higher voltage than an iPad Pro which is why its mAh figure is lower even though the battery is bigger.

So, you can only compare battery capacity using mAh if both batteries have the same rated voltage.

 

[alex00100]

[After double checking this it appears that the 10.5-inch iPad Pro actually has a 30.8 watt-hour battery - Apple's website is wrong.]


mAh = milliampere-hour. It is a rating of what current the battery can provide for one hour at the rated voltage. So a 6,700 mAh battery could supply up to 6,700 milliamperes for an hour, or 3,350 milliamperes for two hours, or 13,400 milliamperes for half an hour, and so on.

Power (measured in watts) = current (measured in amperes, or milliamperes) × voltage (measured in volts).

The MacBook Pro runs at a higher voltage than an iPad Pro which is why its mAh figure is lower even though the battery is bigger.

So, you can only compare battery capacity using mAh if both batteries have the same rated voltage.

Thanks for clarifying. The more you know