Agree. I bought a "Chargie" just to get this feature, and it doesn't work with my wireless chargers worth a darn. I would pay at least $40 x 5 units for chargers that reliably stop at 75% with no software required.
I have some Chargie units, but found them finicky enough with the bluetooth connection that I've abandoned them for devices' built-in 80% charge limit, even if the exact charging pattern isn't quite what I'd like.
What? Isn't that a function of the device? The only alternative would be to start discharging at 75%, and I don't want my batteries to constantly cycle while plugged in. I leave them plugged in so they'll run off of wall power.
> The only alternative would be to start discharging at 75%
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.
