Interesting, finished going through my batteries, quite a bit of variation there but decent life in most of them. All are Apple originals other than the 2 NuPower ones.

capacity mAh: 1863, 1934, 3893, 2924, 3425, 3685, 5950 (NuPower 1), 4032, 3051 (NuPower 2). One left to test at my Pismo that I keep in my other office.

I was bummed when NuPower discontinued their Pismo batteries last year. Was always planning to get a fresh one of those.

I was surprised by the difference between my two NuPower ones, didn't realize that the one was so much better than the other. I will guard that one carefully...

Next, I'm going to clock real-use runtime on the 1863 battery and see where that one sits.

I guess I can always get one of the remaining $50 Chinese 6000 mAh ones and see how that does. Is anyone using these, do they hold up?