For my use on lunch break when I’m near a power outlet, I’m going to charge the Apple MagSafe battery pack to 100% and my iPhone to 100% because at this time the Mag died.
Then when lunch is over at around 1:00 the Mag will be at 100% and so will iPhone. If I work overtime until 6:00 my iPhone will be at 90% but Mag will most likely die or be close to dead. But iPhone will be at 90%.
The Apple Mag is definitely slim enough that it fits into my work pants cell phone pocket easily.
I wouldn’t use this if I’m on vacation cause of not worrying being near power outlet. I would use my Anker 633.
This is exactly how I get the best battery life from my magsafe pack. Charge phone and battery to 100% then connect battery to phone. The device uses the first 10% from internal battery, then, phone will stay at 90% for hours, just using the charge from the battery pack.
Sometimes, the battery pack will recharge itself from the internal battery, and then recharge the phone again. This Is something that I've seen a few times... very strange, but apple magic I guess, here's a screenshot:
The pack recharged from the phone (both started at 100%) and you can see the charge icon on both devices, but there's only the battery attached to the phone, with no additional wired charger connected.
I think that maybe , There's a lot of stuff under the hood that is still unknown about how this thing really works.