It is a known fact that Li-Ion batteries will die and become useless much faster when kept fully charged 100% and always topped up 100% as compared to when they're only charged to, say, about 50% or 80%, and never topped up prior to going below 46% or some such (or at the very least, never below 96%, say). Which is why IBM/Lenovo ThinkPad series has a very visible and apparent option which lets the user specify the exact start/stop charges (they even have the option to automatically discharge the battery to 50%), and why the batteries in ThinkPads have an overwhelmingly much better lifespan in the stationary scenarios than the competitors.
Most laptops and mobile phones (with hotspots) by other manufacturers, however, don't have any such options, and, as a result, suffer premature battery failure when they are merely used as stationary devices. It would not be uncommon for such batteries to fail and even deform even prior to their advertised 300 cycles or whatnot, sometimes taking back with them the whole use of the device (mobile phones may not even turn on without a battery, even if USB power is present; and what do you do if the battery has bulged so much as to no longer fit?), or individual features of the device (battery bulging in a MacBook may cause the buttons on the trackpad to stop working; or if you remove it, there goes your CMOS RTC).
It would seem that companies like Apple, Dell, HTC etc, can't possibly not know these issues that have been known to IBM/Lenovo ThinkPad designers since a long time. Are there grounds for some sort of a class action case here, for negligence and/or fitness? Can we sue these manufacturers for failing to provide options for shutting the charger off at 50%, and for needlessly trickle-charging the batteries ad nauseam, resulting in premature failures, including loss of capacity and bulging?
Wouldn't this be an example of negligence to know about these things (and it is widely known that batteries are best stored at 50% charge, even apple.com/batteries/maximizing-performance/ has a memo), yet not doing anything in their products to accommodate stationary laptop and phone (w/ hotspot) usage?
Some laptops are even explicitly advertised as desktop replacements – wouldn't it be a fitness issue if the manufacturer fails to provide a 50% charge option for extended desktop use? (Wouldn't it also be fraud if they subsequently sell replacement batteries at a nice profit, after ensuring their circuitry will effectively ruin Li-Ion and Li-Polymer batteries through such trickle charging as above?)