It shouldn’t be a surprise that the new iPhone 14 series from Apple has a similar shape and overall dimensions to the 2021 series (they differ just by a few millimetres), thus the battery capacity are also essentially the same.
There are slight variations, but probably not enough to noticeably affect battery life. This year, there are now two variants with a huge battery: the more affordable iPhone 14 Plus and the more expensive iPhone 14 Pro Max. They have somewhat smaller batteries than the 13 Pro Max battery, although the difference is minuscule.
The batteries of the iPhone 14 and iPhone 14 Pro are slightly bigger, but only by a few percent. Like last year the vanilla model has a bigger battery than the Pro, but this year they have different chipsets too (and different screens, of course).
It will be interesting to compare the their battery lives – Apple claims that the Plus has the best battery life out of any iPhone so far. Also, the Pro models retain their “all-day battery life” promise despite the new Always On Display function.
Apple did not release official charge statistics, but legal papers indicate that nothing has changed. The iPhone 13 Pro Max, which is unofficially rated at 27W, should be roughly equivalent to the 29W (14.5V, 2A) listed for one of the 3C models.