iPhone Owners
Your battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles. The one-year warranty includes service coverage for a defective battery. If it is out of warranty, Apple offers a battery service for $79, plus $6.95 shipping, subject to local tax.
iPad Owners
Your battery is designed to retain up to 80% of its original capacity at 1000 complete charge cycles. The one-year warranty includes service coverage for a defective battery. If it is out of warranty, Apple offers a battery service for $99, plus $6.95 shipping, subject to local tax.
My iPhones would have like 600 cycles a year if I used them for what I use my iPad (some heavy games and the like). Currently, I'm around 150-180 cycles a year each.Yep, iPads have awesome battery life compared to iPhones. Sure, the bigger display requires more power but the battery capacity is more than enough to cover the disparity and then some. Heck, we had a 5-year old iPad 3 LTE and that one still lasted I believe at least one month on standby.
If I used my iPhone as much as I did the iPad, I'd probably need to replace the battery every year.
iPhone SE (A9)
Battery Weight: 26 g
Wh Rating: 6.21
iPhone 6s (A9)
Battery Weight: 25 g
Wh Rating: 6.39
iPhone 6s Plus (A9)
Battery Weight: 41 g
Wh Rating: 10.61
iPad Air 2 (A8X)
Battery Weight: 132 g
Wh Rating: 27.82
iPad 2017 (A9)/2018 (A10)
Battery Weight: 167 g
Wh Rating: 32.9
In my experience, iPads take forever to drop from 100%. In my experience, it has been anywhere from 40 minutes (maybe playing a heavy game) to 1.5 hours (reading iBooks). The iPhone plus takes maybe 35-45 mins, and the standard iPhone (6s) 25-30 mins.That seems like it is staying at 100% a bit longer than it should so it may be reporting a bit inaccurately, but it shouldn't be surprising that the much bigger battery would result in a longer battery life even with the greater power draw from the screen.