Why Vivo Needed a Sixth Phone in the X300 LineupThe X300 series has already seen the launch of five smartphones, including the Vivo X300, Vivo X300 Pro, Vivo X300 Ultra, Vivo X300S, and Vivo X300 FE. These devices represent a range of entry-level to premium models within the X300 series of flagships from the Chinese manufacturer. Thus, it is easy to see what the key difference between the Vivo X300E and the Vivo X300 FE smartphone is. According to the known details, the former will sport a slightly larger 6.59-inch display and a 7,200mAh battery in a 203-gram chassis compared to the 6.31-inch, 6,500mAh battery, and 190-gram chassis of the latter.Therefore, while the Vivo X300E is expected to be more powerful than the existing mid-range option, it will not replace the Vivo X300 FE as a lighter and cheaper way to enjoy the X300 chipset’s performance.What Vivo Has Actually ConfirmedVivo’s confirmation of the launch of the new X300-series smartphone is narrower than the rumours that have appeared in the past few weeks. The company only mentions the date of the launch in China, the colours black, orange, and white, a 7,200mAh battery, and the design of the rear camera. Other information about the specifications of the device, including the chip set, display size, and storage space, comes from pre-launch leaks and certification databases. This detail is essential for those who are closely following the launch of the device, as often the data from these databases contains information about the configuration of the smartphone, which may not be reflected in the final version that will be released later.How Vivo Fit a 7,200mAh Battery Into a Sub-8mm PhoneThe more exciting detail for those waiting for the launch of this device is the package that should showcase the large battery rumoured to be on board. The most striking feature of the Vivo X300E is expected to be its battery of 7,200mAh, which is one of the largest among the smartphones in the X300 series. 7,200 mAh is not the best as compared to other competitive phones, but what's interesting here is that despite such a heavy battery, the thickness of this phone is 8 mm. And this is because of silicon-carbon batteries.This assumption is based on the TENAA certification database, which lists the thickness of the Vivo X300E at 7.99mm and it weighs 203 grams. If the information on both the battery and the size of the device is accurate, this will make the X300E have more energy in a smaller body than other X300 smartphones.Camera Setup: What's Confirmed and What's LeakedThe most anticipated thing is that this Vivo phone will have the Zeiss triple rear camera, which includes a periscope telephoto lens. It is mentioned in the photos of the smartphone that were published by Vivo during the announcement of the device. The official publication does not mention the exact camera resolution.