"The Realme P4 Power was unveiled earlier this week and its headline feature is its massive 10,001mAh battery. In press materials, Realme compares it to a typical 10,000mAh power bank and says that the phone is 43% thinner (it's 9.08mm thick) and is 14% lighter (weighing 219g). That's impressive, but can you actually use the P4 Power as a power bank?"
"Here's the setup - we started with a fully-charged Realme P4 Power and a nearly-dead iPhone 17 Pro, which was sitting at just 7% battery. We connected the two with a USB C-to-C cable and a device that can measure the charge speed in real time. At the start, the Realme was sending 22W to the iPhone. Note that to reach maximum reverse charging speeds, the screen on the P4 Power has to be off (otherwise, it reserves power for its own operation)."
"30 minutes after the start, the charge speed tapered off to 11W. At this point the iPhone was at 48% and the "power bank" was at 80%. We think this is the most likely real-world scenario - topping up a friend's phone for 10-30 minutes. At 48%, the iPhone user would have enough for the rest of the day, job done."
Realme P4 Power features a 10,001mAh battery and measures 9.08mm thick while weighing 219g, making it thinner and lighter than a typical 10,000mAh power bank. A test connected a fully charged P4 Power to an iPhone 17 Pro at 7% using a USB-C cable and a power meter. Reverse charging began at 22W with the P4's screen off; after 10 minutes it delivered about 19W and the iPhone reached 23% while the P4 showed 94%. After 30 minutes output dropped to 11W with the iPhone at 48% and the P4 at 80%. After 70 minutes charging fell to 7W, the iPhone reached 70% and the P4 was at 61%.
Read at GSMArena.com
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