Anecdotal sample of wear ratios as reported via coconut battery: - my iPhone 6S, barely one year in: down to 87%, 282 cycles. - a friend's 6S+, one and a half

Anecdotal sample of wear ratios as reported via coconut battery: - my iPhone 6S, barely one year in: down to 87%, 282 cycles. - a friend's 6S+, one and a half year in: down to 74%, 398 cycles - another friend's 6S+, two and a half years in: down to 54%, slightly less than 600 cycles Those LiPo are supposed to last 800-1000 cycles before dipping below the 80% mark and it's a far cry from that. Even before I checked the values for mine I noticed a cliff effect when charge goes below 40%, at which point it takes only a dozen of minutes of light use to drain. This is not OK. I can readily accept a non-replaceable battery on a 800-1000€ phone but it has to keep giving good performance (WRT both battery life and throttling) for three years (it was so for my iPhone 3G and 4). Changing the battery on my dime each year is not an acceptable solution. This is poor engineering that minmaxes thinness vs battery, and I see the same trend on the MacBook line, which currently makes me very unlikely to upgrade my 2013 rMBP.