It is necessary.
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The official shell is indeed expensive, but it is also really the best, can perfectly fit the MagSafe charger, does not affect the magnetic performance.
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It has a built-in magnet that aligns precisely with the iPhone series, making it easier to remove and assemble. The precise positioning brought by the magnet makes wireless charging faster and easier.
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No need to remove the case when charging, just attach the iPhone to the MagSafe charger or place it on the Q I certified charger and like all cases designed by Apple, this case has undergone thousands of hours of testing during the design and manufacture process. As a result, it not only has a great look, but also provides good protection when your iPhone is scratched and dropped.
No, Apple's original magnetic design is without a shell charge. Yes, but sometimes it is difficult to align the coil, which makes the wireless charging power slow, up to 7.5W. Magnetic charging treasure can also be charged by the mobile phone shell, but the mobile phone shell has no magnetic function, so the charger must be close to the charging, if you want to achieve the role of magnetic absorption, the magnetic phone shell can also use the magnetic charger, directly connected.