I've had this since August 9th and use it a few times a week This will not give you another full charge on your device, it depends on which iPhone 12 (now 13) you have. My 12 Pro max it will get me about 50-60% of an extra charge. Thermal management is aggressive, if you're doing anything heavy on the device and it's moderately warm out, the battery will not charge your phone. I checked with Apple support and this was expected. It's a little annoying the battery will stop charging your phone at 90%, you can disable the limit and go to 100% but I would not suggest doing this. I let it charge my phone from 75% to 100% and the battery pack went from 100% down to 30% which wasn't worth it. ---------- My take away from owning the battery, it's nice to have and grab when you know you need more life or don't feel like getting plugged into an outlet when moving around your home/space, but don't expect it to be a game-changer doubling your battery life. I treat it more like an accessory I grab on the go like my headphones for my device.

The magnetic seal for this battery pack is fantastic, it is very convenient for traveling, but if you have a job where you have to use your phone a lot this would not be the charger for you. I work delivering so I have to use GPS all day long this battery pack super convenient however during the daytime here in Florida it gets very hot, and when it is hot, the battery charges extremely slow. I had my iphone die while this charger was attached and the charger had lots of juice (over 80%). At night, when i’m delivering, this battery pack is flawless. The iphone software works perfecly, giving you the life of both your iphone and the battery pack. I realize most people dont use GPS all day long on their iphone, so i feel giving 4 stars is fair. Once they can get a battery pack that charges at 7watts or more instead of the current 5 watts(when its not hot, i believe when hot it runs closer to 3 watts) i will be happy to give it 5 stars because i love everything else but the charging speed

Good

I like that it just sticks to the back of the iPhone and it charges. It is easy to use and convenient!

Charges phone fast. Problem is you don’t know how much battery life is used or left on it!!!

It’s good but if you use your phone a lot while your using it doesn’t charge your phone that much

This charger is great for MagSafe devices. Don’t expect more than one charge and you cannot charge devices that are not MagSafe compatible

I miss a high quality battery case from Apple but in some ways this is convenient. I do not like that it will only charge the phone to 90-91%. Apple is so worried about decreasing battery life but let me make that decision and since I get a new phone every year it doesn’t matter for me. Apple MagSafe cases are too slippery and don’t have a great grip with this thing on.

Once you know what you'll get, if you decide to, buy it. It's an expensive under-powered battery, but as with everything Apple does, it just works. I like that the battery charge appears in the phone itself. I like that it doesn't require a power button. It's enough for what I needed. I like the form factor. I like how it attaches to the back of my iPhone 12 Mini. I like the color and the texture. It's not better on paper than other offerings but is elegant, and I like elegant.

Update, make sure you are using the most current iOS. With having a brand new iPhone 12 mini, it was running iOS 14.1 and would show a charging symbol in the battery but would not seem to charge at all. After update works as advertised. Nice way to extend the battery life of the mini without being tethered to a wall. Only 4 stars due to small battery size, will take mini from ~14% to ~70% with intermittent use while charging over a couple hours.