Try different chargers, there’s a lot of defective hardware out there. Also it’s at 80%, but there’s a setting on iPhones and possibly iPads etc that avoids charging to 100% to preserve long term battery life if you’re going to leave the device plugged in long term.
> To change your charging option with iPhone 15 models and later, go to Settings > Battery > Charging and choose an option. You can choose a charge limit between 80 percent and 100 percent in 5 percent increments.
My bet would be sth about the voltage the charger provides.
If you want to test, consider trying with a non-Apple wall-wart for which the rated wattage is equal to or greater than the one which Apple provides with your iPad mini and which uses a USB-C connection rather than a USB-A one. If it comes with a USB-C to USB-C cable, use that, otherwise get one that supports USB-C PD and enough watts to match the iPad mini’s needs.
Battery tech is a horrible black hole that is not very fun to dig into, chargers are a little bit more transparent: with markings for various voltages and amperages printed on the device.
iPad batteries output 3.7v if I'm not mistaken, but I'm unsure what they charge with.
> iPad batteries output 3.7v if I'm not mistaken, but I'm unsure what they charge with.
For the layman, the equation is Volts x Amperes = Watts.
Where if we use the common water examples: Voltage is electric charge ("water pressure" or "volume of water"), Amperage is electric current ("water flow rate"), and Wattage is electrical energy ("amount of water transferred").
2V x 6A, 4V x 3A, 1V x 12A, 12V x 1A and similar are all 12W but they are obviously very different in nature.
Not necessarily, Chargie lets you configure minimum charge, minimum charge for a cycle, time to charge, etc.
In practice, what it looks like for my devices:
1. I plug in my phone when I go to bed. 2. Phone charges to 40% (if it's not already >40%) and stops charging. 3. At 5am or so, the phone is still at ~38%, it then charges to 80% and stops. 4. I get up and my phone is still at ~78% charge.
For devices with more software capabilities than phones (e.g. macOS) you can use software (e.g. Al Dente) that will cap the charge level and run off wall power. In practice this means that if I plug my laptop in at 90% charge, it will take weeks to drop to 80% since it's running off wall power, and unless I'm doing particularly high power-draw things the drop to 80% comes down to the battery's self-discharge rate.
A lot of phones only charge to 80% to wave battery life. You can change this setting. Spread the world.
I wonder how much they pay in tech support because of this one thing.
Honestly, we're not that great.