Battery capacity numbers in phone marketing have become almost meaningless. Every brand is announcing bigger cells, and yet the experience of actually using these phones through a full working day keeps telling a different story. The realme P4R 5G is making a specific and large claim: an 8,000mAh lithium-ion battery, three days of endurance on a single charge, and enough in reserve to be the longest-lasting phone at its price point. Claims like that deserve to be tested rather than reprinted. The 91mobiles TestLab put the realme P4R through six standardised one-hour scenarios alongside four direct competitors: the iQOO Z11X (7,200mAh), vivo T5x (7,200mAh), Motorola G57 Power (7,000mAh), and CMF Phone 2 Pro (5,000mAh). Every test was performed under controlled conditions, at the standard 50 percent brightness and 50 percent volume. What follows is what the numbers actually show.
Table of Contents
The methodology
The 91mobiles TestLab kept conditions identical across every device. All phones were charged to 100% and rested before each scenario, with every test running for exactly one hour at 50% display brightness and 50% volume over a Wi-Fi connection. Battery percentage was recorded before and after each session to produce a clean drain figure with no ambiguity. The six scenarios were selected because they cover the actual usage patterns of the buyer this phone is aimed at across a typical working day: scrolling Instagram Reels, YouTube playback, selfie video recording, playing Subway Surfers City, a Google Meet or Zoom session, and movie streaming. Each test isolates a different combination of processor load, display behaviour, camera pipeline, and connectivity activity, which is why the drain figures move as much as they do from one scenario to the next. Figures represent the percentage of battery drained per hour, and lower is better.
Test (1 Hour Each) | realme P4R (8000 mAh) | iQOO Z11X (7200 mAh) | vivo T5x (7200 mAh) | Motorola G57 Power (7000 mAh) | CMF Phone 2 Pro (5000 mAh) |
Instagram Reels Scrolling | 6% | 7% | 8% | 7% | 10% |
YouTube Video Playback | 2% | 3% | 4% | 5% | 6% |
Selfie Video Recording | 4% | 8% | 4% | 8% | 12% |
Subway Surfers City | 7% | 9% | 7% | 9% | 10% |
Google Meet / Zoom Call | 5% | 11% | 11% | 9% | 12% |
Movie Streaming | 4% | 6% | 4% | 7% | 5% |
Average Drain Per Hour | 5.3% | 7.3% | 6.3% | 7.5% | 9.2% |
Breaking down what the numbers mean
What the results table shows most clearly is the compounding effect of the realme P4R’s 8,000mAh cell. In Instagram Reels and YouTube playback, the realme P4R ranks first, with a margin of one percentage point over most competitors. A phone losing 10% per hour on Reels can last for about 10 hours of scrolling. The realme P4R’s 8,000mAh battery can still last for 17 hours, which is the practical difference between a phone you reach for with confidence and one you keep an eye on from lunchtime onwards.
Selfie video recording is where the realme P4R’s efficiency advantage becomes most visible. It drained 4% in an hour of continuous front-camera recording compared with 8% for both the iQOO Z11X and Motorola G57 Power and 12% for the CMF Phone 2 Pro. Only the vivo T5x matched the 4% battery drop. The vapour chamber kept the chassis cool throughout with no significant throttling observed, confirming that the 4% represents a genuine sustained load. In absolute terms, that amounts to 25 hours of continuous video recording from the front shooter on the realme P4R, while the lack of a vapour chamber on vivo T5x results in less endurance.
Gaming with Subway Surfers City resulted in a 7% drain on the realme P4R over one hour, matching the vivo T5x, while the competitors recorded drops of 9% and 10%. What the figure does not tell you on its own is how long that drain rate can be sustained, and that is where the 8,000mAh cell changes the conversation. At that rate, and with the vapour-chamber cooling, the realme P4R delivers well over 10 hours of Subway Surfers on a full charge, which is a session length no competitor in this test can match.
Video calling is the most demanding test in the suite because it keeps the front camera, microphone, speaker, display, and network radio all active simultaneously with no idle periods. The realme P4R drained 5% in one hour on Google Meet, outperforming competitors by a wide margin. For anyone whose day involves multiple hours of video calls, the realme P4R’s combination of a lower drain rate than its rivals and a larger cell than any of them yields a meaningful lead in total available call time of close to 20 hours.
Movie streaming produced a 4% drain on the realme P4R over one hour. The vivo T5x matched that result; the iQOO Z11x came in at 6%, and the CMF Phone 2 Pro at 5%. What matters more than the hourly rate here is the arithmetic of a full evening. This translates to watching an average of a three-hour movie, which will account for 12% of the realme P4R’s charge. Four hours account for 16%. An entire evening of content, from dinner to bedtime, leaves the realme P4R with more than three-quarters of its battery intact going into the next morning, which makes the three-day endurance claim feel like a reasonable extrapolation from real usage.
The bigger picture: capacity is the argument
Averaged across all six tests, the realme P4R’s drain rate of 5.3% per hour is consistent with the competition while running off a significantly larger reserve. Translated into absolute milliamp-hours, the realme P4R consumes approximately 424mAh per hour across the test suite. With 8,000mAh to draw from, that means roughly 19 hours of mixed real-world use before reaching empty, sustaining every usage pattern tested for longer than any competitor in this price range. The percentage drain rate is as shown in the table. The milliamp-hour consumption and the total reserve determine whether you charge at 6 PM or 10 PM, and by that measure, the realme P4R leads the field.
The PCMark battery endurance benchmark put the realme P4R at 15 hours and 55 minutes, ahead of the iQOO Z11X at 14 hours and 21 minutes, the Motorola G57 Power at 15 hours and 18 minutes, and the CMF Phone 2 Pro at 12 hours and 38 minutes. The vivo T5x test crashed several times.
Bottom line: realme P4R offers segment’s most efficient battery performance
That was our budget segment battery showdown, featuring phones with batteries ranging from 5,000mAh to 8,000mAh. Despite identical test conditions, you can see just how differently these smartphones have been tuned for real-world efficiency.
The realme P4R is the clear overall winner. It leads in PCMark endurance, drains the least across every scenario from Reels to Google Meet, and is the only phone in this test that can genuinely back up a three-day battery claim with real-world numbers. Its vapour-chamber cooling also ensures that efficiency holds up under sustained load, not just light use.
The vivo T5x is a strong second, matching the realme P4R in selfie video and movie streaming efficiency despite a 7,200mAh cell, but the absence of thermal management means that advantage erodes under heavier tasks. The iQOO Z11X has the same capacity as the T5x but is consistently less efficient across the board, making it a reliable all-day phone rather than a standout.
The Motorola G57 Power struggles in video calls and YouTube playback despite its 7,000mAh cell, suggesting optimisation gaps that raw capacity alone cannot paper over. The CMF Phone 2 Pro, with its 5,000mAh battery, sits in a different league entirely; it is a capable phone, but battery confidence is simply not its story.
Tested by 91mobiles TestLab. All tests were conducted at 50% screen brightness and 50% volume. Each scenario was tested for one hour on a fully charged device.
