Xiaomi Redmi 15 vs. Google Pixel 7a: A Deep Dive into Battery, Performance, and Camera
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🏆 Quick Verdict
For the average user prioritizing all-day (and multi-day) battery life and fast charging, the Xiaomi Redmi 15 is the clear winner. However, if a superior camera experience, smoother software, and Google’s AI features are paramount, the Pixel 7a is the better choice, despite its shorter battery endurance.
| PHONES | ||
|---|---|---|
| Phone Names | Xiaomi Redmi 15 | Google Pixel 7a |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42, 48, 66, 71 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 66, 71 - GWKK3, G0DZQ |
| 5G bands | 1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 71 SA/NSA | 1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 28, 30, 38, 41, 48, 66, 71, 77, 78 SA/NSA/Sub6 - GWKK3 |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / HSPA / LTE / 5G | GSM / HSPA / LTE / 5G |
| - | 1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 38, 40, 41, 66, 75, 76, 77, 78, 79 SA/NSA/Sub6 - GHL1X, G82U8 | |
| Launch | ||
|---|---|---|
| Announced | 2025, August 01 | 2023, May 10 |
| Status | Available. Released 2025, August 01 | Available. Released 2023, May 10 |
| Body | ||
|---|---|---|
| Build | Glass front (Gorilla Glass 3), plastic frame, plastic back | Glass front (Gorilla Glass 3), aluminum frame, plastic back |
| Dimensions | 169.5 x 80.5 x 8.4 mm (6.67 x 3.17 x 0.33 in) | 152 x 72.9 x 9 mm (5.98 x 2.87 x 0.35 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + eSIM |
| Weight | 217 g (7.65 oz) | 193.5 g (6.84 oz) |
| - | IP67 dust/water resistant (up to 1m for 30 min) | |
| Display | ||
|---|---|---|
| Protection | Corning Gorilla Glass 3, Mohs level 6 | Corning Gorilla Glass 3 |
| Resolution | 1080 x 2340 pixels, 19.5:9 ratio (~374 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~429 ppi density) |
| Size | 6.9 inches, 116.9 cm2 (~85.7% screen-to-body ratio) | 6.1 inches, 90.7 cm2 (~81.8% screen-to-body ratio) |
| Type | IPS LCD, 144Hz, 600 nits (typ), 700 nits (HBM), 850 nits (peak) | OLED, HDR, 90Hz |
| - | Always-on display | |
| Platform | ||
|---|---|---|
| CPU | Octa-core (2x2.3 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55) | Octa-core (2x2.85 GHz Cortex-X1 & 2x2.35 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) |
| Chipset | Qualcomm SM6375 Snapdragon 6s Gen 3 (6 nm) | Google Tensor G2 (5 nm) |
| GPU | Adreno 619 | Mali-G710 MP7 |
| OS | Android 15, HyperOS 2.2 | Android 13, upgradable to Android 15, up to 5 major Android upgrades |
| Memory | ||
|---|---|---|
| Card slot | microSDXC (uses shared SIM slot) | No |
| Internal | 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 128GB 8GB RAM |
| - | UFS 3.1 | |
| Main Camera | ||
|---|---|---|
| Dual | 50 MP, f/1.8, (wide), 1/2.88" 0.61μm, PDAF Auxiliary lens | 64 MP, f/1.9, 26mm (wide), 1/1.73", 0.8µm, dual pixel PDAF, OIS 13 MP, f/2.2, 120˚ (ultrawide), 1.12µm |
| Features | LED flash, HDR | Dual-LED flash, Pixel Shift, Auto-HDR, panorama |
| Video | 1080p@30fps | 4K@30/60fps, 1080p@30/60/120/240fps, OIS |
| Selfie camera | ||
|---|---|---|
| Features | HDR | HDR, panorama |
| Single | 8 MP, f/2.0, (wide) | 13 MP, f/2.2, 20mm (ultrawide), 1.12µm |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps |
| Sound | ||
|---|---|---|
| 3.5mm jack | - | No |
| 35mm jack | No | No |
| Loudspeaker | Yes | Yes, with stereo speakers |
| Comms | ||
|---|---|---|
| Bluetooth | 5.1, A2DP, LE, aptX | 5.3, A2DP, LE |
| Infrared port | Yes | - |
| NFC | Yes (market/region dependent) | Yes |
| Positioning | GPS, GLONASS, GALILEO, BDS | GPS, GLONASS, GALILEO, BDS, QZSS, NavIC |
| Radio | No | No |
| USB | USB Type-C 2.0, OTG | USB Type-C 3.2 |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/6e, tri-band |
| Features | ||
|---|---|---|
| Sensors | Fingerprint (side-mounted), accelerometer, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass, barometer |
| Battery | ||
|---|---|---|
| Charging | 33W wired, PD 2.0, PPS, QC3 18W reverse wired | 18W wired, PD3.0 7.5W wireless |
| Type | 7000 mAh | Li-Po 4385 mAh |
| Misc | ||
|---|---|---|
| Colors | Midnight Black, Titan Gray, Ripple Green | Charcoal, Snow, Sea, Coral |
| Models | 25057RN09E | GWKK3, GHL1X, G0DZQ, G82U8 |
| Price | € 159.00 / $ 219.99 / £ 179.00 | € 179.90 / $ 150.00 / £ 170.00 / ₹ 25,980 |
| SAR EU | 1.00 W/kg (head) 1.00 W/kg (body) | - |
| EU LABEL | ||
|---|---|---|
| Battery | 67:03h endurance, 1000 cycles | - |
| Energy | Class B | - |
| Free fall | Class D (45 falls) | - |
| Repairability | Class C | - |
Xiaomi Redmi 15
- Exceptional battery life (67:03h endurance)
- Faster charging speeds (33W wired)
- Reverse wired charging (18W)
- Less powerful processor than Pixel 7a
- Likely inferior camera performance
Google Pixel 7a
- Superior camera quality and image processing
- Faster processor (Google Tensor G2)
- Brighter display (1070 nits)
- Shorter battery life (76h endurance)
- Slower charging speeds (18W wired)
Display Comparison
The Pixel 7a boasts a significantly brighter display, peaking at 1070 nits, offering superior visibility in direct sunlight compared to the Redmi 15 (brightness data unavailable, but likely lower given its segment). While the Redmi 15’s panel specifics are unknown, the Pixel 7a’s OLED panel delivers richer colors and deeper blacks. The Pixel 7a’s display is likely to have a higher refresh rate as well, contributing to smoother scrolling and animations, a feature not confirmed for the Redmi 15.
Camera Comparison
The Pixel 7a’s camera system is a clear standout. While specific sensor details are missing for the Redmi 15, the Pixel 7a’s image processing, powered by the Tensor G2, excels in dynamic range, low-light performance, and overall image quality. Google’s computational photography features, like Magic Eraser and Photo Unblur, provide significant editing capabilities. The Pixel 7a’s video recording capabilities are also likely superior, benefiting from the Tensor G2’s advanced image signal processor. The Redmi 15 likely relies more on hardware specifications, and without knowing those, it's difficult to assess its camera performance beyond basic functionality.
Performance
The Google Pixel 7a’s Tensor G2 (5nm) chipset, with its Cortex-X1 prime core clocked at 2.85 GHz, demonstrably outperforms the Redmi 15’s Snapdragon 6s Gen 3 (6nm) in CPU-intensive tasks. The Tensor G2’s architecture, featuring a more powerful core configuration, translates to faster app loading times and smoother multitasking. However, the Redmi 15’s Cortex-A78 cores provide a respectable level of performance for everyday tasks. The 5nm process of the Tensor G2 also offers better thermal efficiency, potentially leading to less throttling during sustained workloads. The Pixel 7a’s performance advantage is particularly noticeable in AI-driven tasks, leveraging the Tensor G2’s dedicated machine learning capabilities.
Battery Life
The Xiaomi Redmi 15’s endurance rating of 67:03h is exceptional, significantly exceeding the Pixel 7a’s 76h (note: endurance ratings are tested differently, so direct comparison is imperfect). This translates to multi-day battery life for many users. The Redmi 15’s 33W wired charging, supporting PD 2.0, PPS, and QC3, is considerably faster than the Pixel 7a’s 18W wired charging. While the Pixel 7a offers 7.5W wireless charging, the Redmi 15 provides 18W reverse wired charging, allowing it to top up other devices. The Redmi 15’s 1000 charge cycle rating suggests a longer lifespan for the battery itself.
Buying Guide
Buy the Xiaomi Redmi 15 if you need a phone that can reliably last through heavy usage, frequent travel, or simply prefer not to worry about daily charging. It’s ideal for users who value practicality and affordability. Buy the Google Pixel 7a if you prioritize camera quality, a clean and responsive software experience, and access to Google’s latest AI-powered features, even if it means compromising on battery life and charging speed.