2016 MBP Battery Convert mAh to Watt hours

[jrbd90]

Ok, so the 2016 is supposed to have a 76 watt hour battery

System information and coconut battery list battery life and design capacity in mAh.
System information under battery power also lists the voltage as 12.8V.

Design capacity from coconut battery for my 2016 15" battery = 6669mAh.

Formula is (mAh)*(V)/1000 = (Wh). For example, if I have a 6669mAh battery rated at 12.8V, the power is 6669mAh * 12.8V / 1000 = 85Wh.

Even if it was calculated at 12v the watt hours would still be over 80.

To get ~76watt hours the design capacity would need to be closer to 6000mAh.

What are the rest of you showing for design capacity in Coconut Battery?

 

[protoxx]

watts=amps * volts

Example 120 watts= 1amp * 120volts

amps=watts/volts

?amps= 76 watts / 12.8 volts

5.9375 amps=76 watts/12.8 volts

5.9375 amps=5937.5 milliamps

Lots of batteries are advertised at some milliamps but at a unrealistic voltage.

That's how electric circuits perform. Batteries may perform in a different or non-linear fashion. The batteries are a chemical storage mechanism.

 

[littlepud]

Ok, so the 2016 is supposed to have a 76 watt hour battery

System information and coconut battery list battery life and design capacity in mAh.
System information under battery power also lists the voltage as 12.8V.

Design capacity from coconut battery for my 2016 15" battery = 6669mAh.

Formula is (mAh)*(V)/1000 = (Wh). For example, if I have a 6669mAh battery rated at 12.8V, the power is 6669mAh * 12.8V / 1000 = 85Wh.

Even if it was calculated at 12v the watt hours would still be over 80.

To get ~76watt hours the design capacity would need to be closer to 6000mAh.

What are the rest of you showing for design capacity in Coconut Battery?

The battery is nominally rated at 11.4V and 6667mAh. It's stamped right onto the battery itself.

https://d3nevzfk7ii3be.cloudfront.net/igi/y2nrVjxllI32cO3r (via iFixit)

 

[jrbd90]

Thanks that makes more sense. I wonder why it states 12.8v under system information.
I can see capacity fluctuating as mine is showing 6841mAh in coconut