the transmission loss itself really doesn't matter on the scale of a phone or tablet. we're talking about less than 10 Wh wasted per full charge (assuming a 40

the transmission loss itself really doesn't matter on the scale of a phone or tablet. we're talking about less than 10 Wh wasted per full charge (assuming a 40 Wh battery, much larger than we see in phones). this adds up to a large number when you multiply across millions of iOS users, but it could be totally offset if each of them chose a single LED indoor light to run for one hour less each day. a more compelling argument might come from the battery degradation angle. wireless charging accelerates battery wear, leading to a battery or entire device being replaced prematurely.