Uh-huh. The battery in an iPhone is actually replaceable, but Apple never intended you to do it. You need steady hands or you'll bollox the iPhone. You can get instructions on the net. After twice paying a local repair shop to fit batteries out of China that lasted less than a month, I got a good French-made battery from seller youtech20 on Ebay, with the necessary tools included, and my son did the job in ten minutes. It is however a very fiddly job, perhaps the fiddliest part being glueing the screen back on. This is an iPhone SE from 1916 [EDIT 2016 -- fangs In4], so the original battery lasted a not-unreasonable six years, and the battery in an iPhone 4S has lasted well over a decade. (I like the aluminium-framed iPhones because they're sturdy enough for bicycle use, whereas I trash an Android plastic phone in less than two years of intermittent use.)
About banning lithium-ion batteries, I'm receptive to the argument that petrol is dangerous and we've tamed it by regulation.
About house fires cause by incompetently designed controllers in chargers, and users' careless lack of attention, from below the middle of the market upwards, batteries and chargers come with control circuitry with CE markings, and the really cheap stuff isn't let into Europe for lack of type approvals.
It is anyway good practice to charge li-ion batteries only in rooms where you are, or possibly when surrounded by fire alarms though I haven't tried that.
Yesterday I routinely charged two vacuums that live in my study and studio and crawl the floor, two phones, two iPads, one further lightweight pad for reading on, one 36V bicycle battery, one li-ion torch battery (also for my bike), six ni-cad AAs, four ditto AAAs, camera batteries, a further two heavy duty AAs for a small movie camera for my bike, a portable lightbox, a portable small daylight lamp to clip to my easel for when I paint outside in shadow or dusk, a set of Bluetooth earphones, several small boxes of power reserves, and no doubt some that I've forgotten. If li-ion batteries are banned, and consequently I have to give up any or all of the equipment powered by these batteries, life would become very inconvenient.