When Google launched the Pixel and Pixel XL phones, it mentioned that the differences between the two phones was negligible aside from the fact that the Pixel XL features a phablet-sized display, a larger battery, better screen resolution and of course, a larger price tag. However, what the company failed to mention was that while the Pixel XL can be charged at 18W speeds, the smaller Pixel peaks at 15W, which may not be fast enough but the smaller battery in the latter compensates for it.
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It's pertinent to know what 15W and 18W charging speeds mean to smartphones. Modern smartphones come with quick charging capabilities but they can call themselves so only if they are rated either 15W or 18W, depending on battery sizes and capacities. 15W and 18W charging speeds are much faster than standard ones and ensure that phone batteries are saturated with a lot of power in a short amount of time, letting then run longer on 15-minute or 30-minute charges.
The news that the Pixel is capable of being charged at 15W and not 18W was revealed earlier today by Nathan K, a well-known Android device tester. "The 9v PDO of the OEM charger will never be used in normal operation. (Charger-cable-phone.) This means the Sailfish is functionally capped at 15w charging (5v/3a), not 18W as advertised. Furthermore, I have gathered data suggesting typical charging rates are in the 6.25w [actual] range (5v/1.25a)," he said.
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He added that 15W speed will charge the Pixel phone just as quickly as an 18W speed would charge the Pixel XL, but mentioned that Google misrepresented the facts when publishing details about the two phones. "I want to stress that the cap at 15w will likely have NO FUNCTIONAL IMPACT on the use of the Sailfish. At the same time, I feel there was a misrepresentation of the device's capabilities. To put it another way, when people purchase a V6 car they WANT a V6. Even if the V4 may get "about the same" performance, or have better mileage," he added.
Google subsequently admitted to the fact that Pixel charging will peak at 15W and said that mentioning that Pixel will charge at 18W was a marketing mistake. The 3W difference may amount to a lot of time wasted in charging if we talk about large phones or tablets, but for the Pixel with a 2,770 mAh battery, the difference doesn't amount to much.