Four main sources were identified in the battery waste pool: mobile phones, laptop and tablet PCs, small handheld devices, and hybrid electric vehicles. This study analyzes open access data on the input and generation of end-of-life lithium-ion batteryLithium-ion battery waste supply for a potential commercial battery recyclingBattery recycling industry in BangladeshBangladesh. This is particularly timely considering the policy attention on smartphones at the EU level. manufacturers, designers, consumers and policy makers) interested in improving the durability of smartphones. The findings of this paper can be used by decision makers (e.g. Considerations about reliability and/or repairability should be integrated in the design of all smartphones. However, trade-offs between these two aspects can occur. The analysis of devices on the market suggests that it is possible to design satisfactorily reliable devices without compromising repairability excessively. As common elements of the two strategies, easily-available instructions on use, maintenance and repair are also needed. This can be facilitated through modular design concepts, ease of disassembly of key parts, availability of spare parts and repair services. However, if and when failures occur, repairs have to be rapid and economically viable. in terms of software/firmware updates, memory and storage capacity). Apart from the bottom-line consideration of reliability aspects for electronics, this can be pursued through the design of devices which: i) are resistant to mechanical stresses ii) implement durable batteries iii) offer sufficient adaptability to future conditions of use (e.g. Increasing the reliability of smartphones can reduce the occurrence of early replacements. display, battery, back cover), as well as software, can be critical. Smartphones are often replaced prematurely because of socio-economic and technical reasons. Technical trade-offs between reliability and repairability aspects are also discussed. This paper analyses limiting states and design trends affecting the durability of smartphones, and identifies reliability and repairability measures to extend the product lifetime. Recent trends show that their replacement cycle has become on average shorter than two years, which comes with associated environmental impacts that could be mitigated through a prolonged use of such devices. And of course 5% isn't a configurable threshold, so you can't change it to, say, 20% instead.Īpparently this is baked into firmware on a charge controller IC somewhere, so it's not hackable with some i2c commands like the charge thresholds.Smartphones are available on the market with a variety of design characteristics and purchase prices. By the time your external battery is low enough to warrant a hot swap, the internal battery is gone, and you have to power down or plug in. This means that for something like the first year of use, these Thinkpads will consistently discharge the internal battery to 5% before touching the external battery. The external lithium ion batteries tend to report nominal battery capacity accurately. When new, the internal lithium polymer battery reports its nominal capacity conservatively, so that the measured capacity is a few hundred mAh higher than nominal, making it appear healthier. T480) will discharge whichever battery appears "healthier" first, rather than taking the sensible route of discharging the external battery first so that your internal battery isn't completely dead when you're trying to hot swap. Somewhat infuriatingly, Thinkpads with two batteries (e.g. Maybe just get some comparative specs on MacRumors or with one of the utilities (some benchmark against everyone else iirc) IIRC, batteries drop a notch when they start getting used, plateau there for a while where it mostly depends on environment (try not to charge them when it's 110deg ambient, for example, overheating will kill a battery fast) then eventually drop again and start heading on down.Īnd, of course, all of this scales by how cold it currently is ambient because lithium batteries have reduced charging capacities cold (though I don't think it damages them permanently like heat does).įor all I know, 95% (roughly where you're at) is the expected amount once all factors are concerned I wouldn't worry too much. I'm also not sure how quickly it's expected to drop in capacity. There's something to be said for occasionally running the battery down to zero and charging it all the way back up, of course, but I wouldn't think of it as an effective regimen with current battery tech. Their change will basically give you that 80% bit. At this point, I think anything you do is going to not be better than what the system could automatically do for itself.
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