Is my MacBook battery a ripoff?
April 27, 2011 12:28 PM Subscribe
Is this laptop battery a ripoff, and how can I be sure? I bought a third party battery for my Macbook. It looks like the original 45Wh battery, but Coconut Battery (and the appropriate ioreg command) report the 'design capacity' as lower than it should be.
The third-party battery says it is 45Wh, but it reports its 'design capacity' as 3600mAh. 45Wh at 10.8V should be ~4100mAh, and the original battery does indeed report a 'design capacity' of 4100mAh. So the new battery seems out of line.
Note that I'm not talking about the current capacity here. I'm aware that the current capacity will be different from the design capacity, and that it can be fixed by recalibration. But I would expect the design capacity to match the value stated on the package.
So, is this enough evidence to send the battery back to the seller for a refund? Is there another way to be sure whether I got what was advertised? And are third-party batteries often sketchy in this way?