rMBP suspends on high power draw; dead battery

[SuprUsrStan]

I encountered something interesting today.

When I maxed out the CPU with 8 threads of "yes > /dev/null &" while on battery, the macbook pro went into suspend mode after a couple minutes.

When I tried to turn it on, I got this symbol.

It refuses to boot up on battery. When I plug it in, the laptop starts up just fine with 30% battery...
I was able to reproduce this a couple times.



EDIT: Looks like my battery just gave out on me.

 

[maflynn]

Does it do this when you use the computer normally?

I'd say you drained the battery since you caused the CPUS go at 100% (or near) and the computer shut down.

My advice is not to run yes > /dev/nul while on the battery.

 

[SuprUsrStan]

Does it do this when you use the computer normally?

I'd say you drained the battery since you caused the CPUS go at 100% (or near) and the computer shut down.

My advice is not to run yes > /dev/nul while on the battery.

It did the same thing when I was on battery at 25% when watching a flash video. There was a little bit of heat generated by the computer as the fans spun up but it was nowhere near a cpu burn.

It's very annoying since I need to then go find the power plug because it refuses to start up once it goes into that mode.

It's as if the 0% needs to be recalibrated but it clearly has power since it only acts up under load. It like it doesn't have the current or something :/

 

[maflynn]

Take it into apple and see what they say. If you're battery is shutting the machine down at 25% that's not right.

I'd also look to maybe calibrate it, but given the deep drains you've done, I think the calibration isn't needed.

 

[SuprUsrStan]

Take it into apple and see what they say. If you're battery is shutting the machine down at 25% that's not right.

I'd also look to maybe calibrate it, but given the deep drains you've done, I think the calibration isn't needed.

I'm well out of my warranty.

Well that's it then. I just got the error: