[flagged]
I have multiple devices with lithium batteries plugged in 24/7. A kindle that I use as a display for example. So far nothing exploded. If exploding kindles were a thing I guess I would have heard.
you use a kindle as a display?
An update on the Farphone's battery
41–50 of 65 posts
Re: An update on the Farphone's battery
#42So the Fairphone 2 runs on just a USB cable with no battery inside?
I'd like more details. Many devices won't run on USB cable alone: they won't start without a battery as well.
Fairphones are designed to be modular and repairable, I'd imagine it's much more robust than the average smartphone.
Re: An update on the Farphone's battery
#43The real question is "what the hell is a farphone"?
Apparently not a misspelled Fairphone, as I originally thought. I wouldn't mind an article about that battery.
No actually, it is a Fairphone after all.
Re: An update on the Farphone's battery
#44I would’ve expected a hardware-based lithium-ion charge controller which would continue to work regardless of what software runs on the main CPU(s).
Re: An update on the Farphone's battery
#45Why not just have the charge controller "unplug" it if the battery is full?
All of the controllers do that! But then battery starts to self-discharge, eventually a controller detects "huh, the battery is no longer charged" and start charging again.
Over years, this can accumulate enough charging cycles so battery gets worn down.. And old batteries have even higher self-discharge, so the cycle accelerates. If you are lucky, the battery lasts long enough. If you are unlucky, you end up with "spicy pillow". If you are super unlucky, and charger's temperature sensor fails (or was never installed), or battery gets punctured - you got a fire.
Re: An update on the Farphone's battery
#46These days it is rare for a phone to be able to be used without a battery. The reason is that the max energy consumption when the CPU and GPU are running 100% exceeds the wattage that the device can accept over USB PD.
I've had success using a large capacitor instead of the battery. To keep it charged I connected its positive leg to the 5v USB pin through a diode.
Re: An update on the Farphone's battery
#47I would have hooked the smartphone to a small solar panel. The natural daylight cycle would have made sure that the smartphone kept having charging and discharging cycles. I doubt the traffic hitting it would be sufficient to drain the battery overnight.
That's what the project cited as inspiration does: compost.party
Re: An update on the Farphone's battery
#48[flagged]
I've gone through a dozen or so LiPo-utilizing portable devices at my property in the Mojave desert. All it takes is a single season for many of these batteries to swell up to such an extent the enclosures split open. Ostensibly they contain charge controllers and temperature sensors, yet they're unable to prevent this outcome when the ambient temperature exceeds 110F day after day while the device stays on in a hot…
This has nothing to do with being near full charge and everything to do with the temperature.
Re: An update on the Farphone's battery
#49These days it is rare for a phone to be able to be used without a battery. The reason is that the max energy consumption when the CPU and GPU are running 100% exceeds the wattage that the device can accept over USB PD.
Unlikely a web server would see such usage patterns.
Re: An update on the Farphone's battery
#50The real question is "what the hell is a farphone"?
Apparently not a misspelled Fairphone, as I originally thought. I wouldn't mind an article about that battery. No actually, it is a Fairphone after all.
Well, it is a misspelled Fairphone :) You can see in the picture of the phone that the (paint? sticker?) of the letter i has fallen off