Xiaomi 15S Pro vs OnePlus 12R: A Deep Dive into Performance and Battery Life
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🏆 Quick Verdict
For the average user prioritizing all-day battery life and consistently fast charging, the OnePlus 12R is the stronger choice. Its 14:32h active use score and 100W charging significantly outperform the Xiaomi 15S Pro's unspecified battery performance and 90W charging, despite the 15S Pro's potentially higher peak CPU performance.
| PHONES | ||
|---|---|---|
| Phone Names | Xiaomi 15S Pro | OnePlus 12R |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66 | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 66 |
| 5G bands | 1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79 SA/NSA | 1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / CDMA / HSPA / EVDO / LTE / 5G | GSM / CDMA / HSPA / LTE / 5G |
| Launch | ||
|---|---|---|
| Announced | 2025, May 22 | 2024, January 23 |
| Status | Available. Released 2025, May 22 | Available. Released 2024, February 06 |
| Body | ||
|---|---|---|
| Build | - | Glass front (Gorilla Glass Victus 2), aluminum frame, glass back |
| Dimensions | 161.3 x 75.3 x 8.3 mm (6.35 x 2.96 x 0.33 in) | 163.3 x 75.3 x 8.8 mm (6.43 x 2.96 x 0.35 in) |
| SIM | Nano-SIM + Nano-SIM | · Nano-SIM + Nano-SIM + eSIM (max 2 at a time)· Nano-SIM + Nano-SIM |
| Weight | 216 g (7.62 oz) | 207 g (7.30 oz) |
| Display | ||
|---|---|---|
| Protection | Shatterproof glass (2024 gen) | Corning Gorilla Glass Victus 2 |
| Resolution | 1440 x 3200 pixels, 20:9 ratio (~521 ppi density) | 1264 x 2780 pixels (~450 ppi density) |
| Size | 6.73 inches, 109.4 cm2 (~90.0% screen-to-body ratio) | 6.78 inches, 111.7 cm2 (~90.9% screen-to-body ratio) |
| Type | LTPO AMOLED, 68B colors, 120Hz, 1920Hz PWM, Dolby Vision, HDR10+, HDR Vivid, 3200 nits (peak) | LTPO4 AMOLED, 1B colors, 120Hz, HDR10+, Dolby Vision, 1600 nits (HBM), 4500 nits (peak) |
| Platform | ||
|---|---|---|
| CPU | 10-core (2x3.9GHz Cortex-X925 & 4x3.4GHz Cortex-A725 & 2x1.9GHz Cortex-A725 & 2x1.8GHz Cortex-A520) | Octa-core (1x3.2 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510) |
| Chipset | Xring O1 (3 nm) | Qualcomm SM8550-AB Snapdragon 8 Gen 2 (4 nm) |
| GPU | Immortalis-G925 MP16 | Adreno 740 |
| OS | Android 15, HyperOS 2 | Android 14, up to 3 major Android upgrades, OxygenOS 15 |
| Memory | ||
|---|---|---|
| Card slot | No | No |
| Internal | 512GB 16GB RAM, 1TB 16GB RAM | 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM, 256GB 16GB RAM |
| Main Camera | ||
|---|---|---|
| Features | Laser AF, color spectrum sensor, Leica lens, Dual-LED dual-tone flash, HDR, panorama | Laser AF, color spectrum sensor, LED flash, HDR, panorama |
| Triple | 50 MP, f/1.4, 23mm (wide), 1/1.31", 1.2µm, dual pixel PDAF, OIS 50 MP, f/2.5, 120mm (periscope telephoto), PDAF (30cm - ∞), OIS, 5x optical zoom 50 MP, f/2.2, 14mm, 115˚ (ultrawide), AF | 50 MP, f/1.8, 24mm (wide), 1/1.56", 1.0µm, multi-directional PDAF, OIS 8 MP, f/2.2, 16mm, 112˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro) |
| Video | 8K@24fps (HDR), 4K@30/60fps (HDR10+, 10-bit Dolby Vision HDR, 10-bit LOG), 1080p@30/60/120/240/960fps, gyro-EIS | 4K@30/60fps, 1080p@30/60/120/240fps, gyro-EIS, OIS |
| Selfie camera | ||
|---|---|---|
| Features | HDR, panorama | HDR, panorama |
| Single | 32 MP, f/2.0, 22mm (wide), 0.7µm | 16 MP, f/2.4, 26mm (wide), 1/3", 1.0µm |
| Video | 4K@30/60fps, 1080p@30/60fps, gyro-EIS | 1080p@30fps, gyro-EIS |
| Sound | ||
|---|---|---|
| 35mm jack | No | No |
| Loudspeaker | Yes, with stereo speakers | Yes, with stereo speakers |
| Comms | ||
|---|---|---|
| Bluetooth | 5.4, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5 | 5.3, A2DP, LE, aptX HD |
| Infrared port | Yes | Yes |
| NFC | Yes | Yes |
| Positioning | GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), GLONASS | GPS, GALILEO, GLONASS, BDS, QZSS |
| Radio | No | No |
| USB | USB Type-C 3.2 Gen2, Display Port, OTG | USB Type-C 2.0 |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band |
| Features | ||
|---|---|---|
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Battery | ||
|---|---|---|
| Charging | 90W wired, PD3.0 50W wireless 10W reverse wireless | 100W wired, 100% in 26 min |
| Type | Si/C Li-Ion 6100 mAh | Li-Ion 5500 mAh |
| Misc | ||
|---|---|---|
| Colors | Black, Blue | Iron Gray, Cool Blue, Electric Violet, Sunset Dune |
| Models | - | CPH2609, CPH2585, CPH2611 |
| Price | About 680 EUR | € 410.84 / $ 399.95 / £ 649.00 |
| SAR | - | 1.19 W/kg (head) 0.82 W/kg (body) |
Xiaomi 15S Pro
- Potentially higher peak CPU performance with Xring O1
- 3nm process for improved power efficiency (theoretical)
- 90W wired and 50W wireless charging
- Battery life is currently unknown and a potential concern
- Xring O1 is an unproven chipset with potential software optimization issues
- Limited information available at launch
OnePlus 12R
- Exceptional 14:32h active use battery life
- Ultra-fast 100W wired charging (26 min 0-100%)
- Proven Snapdragon 8 Gen 2 chipset with excellent thermal management
- 4nm process is less efficient than 3nm (theoretical)
- May not match the 15S Pro in peak CPU performance
- Design may be less premium than the 15S Pro
Display Comparison
The OnePlus 12R boasts a measured peak brightness of 1181 nits, ensuring excellent visibility even in direct sunlight. While the Xiaomi 15S Pro’s display specifications are currently unknown, the 12R’s high brightness is a significant advantage. The 12R’s panel likely utilizes LTPO technology, enabling variable refresh rates for improved power efficiency, a feature we anticipate the 15S Pro will also include to compete. Bezels and color accuracy will be key differentiators once the 15S Pro’s display specs are confirmed.
Camera Comparison
Without detailed camera specifications for the Xiaomi 15S Pro, a direct comparison is difficult. However, the OnePlus 12R is expected to feature a capable camera system, likely prioritizing image quality and computational photography. The 15S Pro will need a compelling camera setup to justify its flagship positioning. We expect both phones to offer robust image processing, but sensor size and optical image stabilization (OIS) will be crucial factors in low-light performance. The inclusion of a 2MP macro lens on either device would be largely inconsequential.
Performance
The Xiaomi 15S Pro’s Xring O1, built on a 3nm process, features a complex 10-core configuration (2x3.9GHz Cortex-X925, 4x3.4GHz Cortex-A725, 2x1.9GHz Cortex-A725, 2x1.8GHz Cortex-A520). This contrasts with the OnePlus 12R’s Snapdragon 8 Gen 2 (4nm) with its octa-core setup (1x3.2 GHz Cortex-X3, 2x2.8 GHz Cortex-A715, 2x2.8 GHz Cortex-A710, 3x2.0 GHz Cortex-A510). The 3nm node of the Xring O1 *should* offer superior power efficiency, but the Snapdragon 8 Gen 2 is a known quantity with excellent thermal management. The 15S Pro’s core count suggests a focus on multi-threaded performance, while the 8 Gen 2 excels in single-core tasks. The 12R benefits from Qualcomm’s optimized software and drivers.
Battery Life
The OnePlus 12R shines with its 14:32h active use battery score, demonstrating exceptional endurance. It also supports 100W wired charging, achieving a full charge in just 26 minutes. The Xiaomi 15S Pro offers 90W wired charging and 50W wireless charging, alongside 10W reverse wireless charging, but lacks a comparable active use battery score. The 12R’s faster charging and longer battery life provide a more convenient user experience, especially for power users.
Buying Guide
Buy the Xiaomi 15S Pro if you absolutely need the latest processor technology and are willing to trade some battery life for potentially higher peak performance in demanding tasks like video editing or specialized applications. Buy the OnePlus 12R if you prioritize a balanced experience with exceptional battery endurance, rapid 100W charging, and a proven, thermally efficient chipset for sustained gaming and everyday use.