My iPhone 14 Pro has been at 84% battery health for almost a year now. Anecdotally the battery lasts significantly less time than it did previously, even when it was already at 84% health. I think it may just be a stale calculation, and my actual battery health is significantly lower. If I can get it to show as less than 80%, I can get AppleCare to replace it. Does anyone here know how to get the iPhone to recalculate this value?

I have Coconut batter on the Mac, and it can check the battery health for an iPhone attached with a cable. It uses a different formula, so it gives me a health of 87%. However it also shows history for when I have run it in the past, and when I tested it almost 100 charge cycles ago, it also read 87%. I don't know how any battery can go almost 100 charge cycles with zero degradation (537 to 617 cycles, so it's not like it's a fresh battery).

Hey folks of tildes,

I wanted to see if anyone has similar experiences as mine and if they know the reason for this. I've purchased a few items which came with AAA battery pre-installed (Chromecast from Google, Weighing scale from Xiaomi). These batteries lasted for an incredibly long time, Chromecast lasted over 1.5 years and Xiaomi's scale lasted for a similar time. Any third party battery I've purchased (Energizer, Duracell, Panasonic, Eveready and few others which I can't recall) last for a couple months at best.

I've now switched to rechargeable batteries, to reduce the waste I was creating. Still, I was really curious if anyone has a similar experience, and if they know the reason for it.

After one too many blackouts for the past few years, we're in the market for a backup power solution.

Guidelines include:

• Would rather have multiple smaller units than one large one.
• Should be enough to charge phones, watch a television, run the Keurig. If it can spike up enough to run a heater or keep the fridge from spoiling, that's a bonus.
• Would like to keep it at ~$300 a unit.

We're looking into a whole home generac as well, but this is more of a bandaid trial solution for now.

A student asked me this question today. They were looking into lithium batteries and e-waste and whatnot.

My initial response was something low, like maybe five or six, but the more I thought about it, the higher the number kept climbing — old phones, key fobs, wireless mice, flashlights, a food thermometer, etc.

I’m not sure I have an official count yet, but the number is WAY higher than my gut reaction. I also thought it was an interesting thought experiment, so I figured I’d ask here to prompt people to do their own inventory.

How many battery-operated devices do you have in your home? (They don’t have to specifically be lithium batteries, but if you want to limit it to just that, feel free).