A 7,200mAh battery in a phone that weighs just 203 grams. That’s the detail that stopped me mid-scroll, and it’s the reason the Vivo X300 E is worth paying attention to. China Telecom, one of China’s three big carriers, listed the phone in its database before Vivo could officially say a word, and now we know pretty much everything ahead of the July 27 launch.
According to NotebookCheck, the X300 E is the latest addition to Vivo’s X300 lineup, and the China Telecom listing spills the full details. The phone runs Android 16 straight out of the box, which puts it ahead of most competitors still shipping Android 14 and 15. It measures 157.52 x 74.33 x 7.99 mm, so it’s slim for a phone carrying that much battery. And that battery, again: 7,200mAh. That’s not a typo.
On the camera side, you’re getting a triple rear setup with Zeiss optics, which Vivo has been leaning into hard across its X-series phones. Zeiss branding isn’t always a guarantee of quality, but Vivo has been earning that partnership over the past couple of years rather than just slapping a logo on the box. A promotional video Vivo released confirms the processor is a Snapdragon chip, though the exact model hasn’t been pinned down yet. The listing also confirms an ultrasonic fingerprint scanner and dust and water resistance.
Color options are Moonlight White, Orange, and Black/Gray. The white one looks clean in the leaked images, but that orange is going to turn heads.
So why does this matter beyond the specs themselves? The X300 E sits in a market segment where Vivo is clearly trying to push battery and camera performance without hiking the price into flagship territory. Chinese brands have been aggressive about stuffing premium features into mid-range bodies, and a 7,200mAh cell in a sub-8mm chassis is exactly the kind of move that puts pressure on Samsung and even Apple to answer the question of why their batteries are so much smaller. It’s a question neither company has answered convincingly.
The broader context here is that Vivo is on a serious product roll right now. The X500 Pro, X Fold 7, and now the X300 E are all hitting close together, and each one is pushing something specific. The X300 E’s pitch is clearly battery stamina combined with Zeiss cameras and a clean Android 16 experience. That’s a focused, coherent argument for a phone.
Key specs confirmed so far:
- 7,200mAh battery
- Android 16 out of the box
- Triple rear cameras with Zeiss optics
- Snapdragon processor
- Ultrasonic fingerprint scanner
- Dust and water resistance
- Dimensions: 157.52 x 74.33 x 7.99 mm, 203g
- Colors: Moonlight White, Orange, Black/Gray
Pricing hasn’t been confirmed yet, and availability outside China is still an open question. But the hardware case is already strong. If Vivo prices this right, it could be one of the more interesting mid-range releases of the year. We’ll know more on July 27.