Redmi 15C under the magnifying glass: 6,000mAh battery, 120Hz screen
Redmi 15C launched in Vietnam with 6,000mAh battery, 33W fast charging, 6.9-inch 120Hz HD+ screen, 50MP AI camera, IP64 and NFC. The device uses Helio G81 8-core, HyperOS 2 with AI features, priced from 3.49 million VND.
Redmi 15C is a popular smartphone model recently announced by Xiaomi in Vietnam, focusing on battery life, durability and smooth display experience. With a 6,000mAh battery, 33W fast charging, 6.9-inch 120Hz screen and 50MP AI camera, the device is aimed at users who need a durable device, long-lasting use throughout the day at an accessible price. The following article analyzes the technical pillars of Redmi 15C, the actual benefits, the trade-offs and the product's position in the segment.
Power architecture: 6,000mAh battery, 33W and Smart Charging Engine
The highlight of the Redmi 15C is the 6,000mAh battery. According to the announcement, the device can play videos continuously for 22 hours or listen to music for 82 hours. 33W fast charging technology reaches 50% in just 31 minutes, significantly shortening the charging time during the day. Notably, the Smart Charging Engine is announced to help maintain more than 80% capacity after 1,000 charging cycles, aiming for long-term battery durability.
The device also supports 10W reverse charging, turning the phone into a backup battery for accessories and other devices in necessary situations. With a weight of 205g and a thickness of 7.99mm, Redmi 15C balances between large battery and portability.
6.9-inch 120Hz display: high refresh rate and AdaptiveSync
The 6.9-inch HD+ display has a maximum brightness of 810 nits, which is suitable for many lighting scenarios. The 120Hz refresh rate with AdaptiveSync automatically adjusts the refresh rate depending on the content, optimizing the smooth experience while also helping to save energy. The display is certified for eye protection by TÜV Rheinland.
Durability, wet handling and connectivity
Redmi 15C is IP64 dust and water resistant, adding resistance to everyday use. Wet Touch 2.0 technology allows for more sensitive touch when your hands are wet. The device is also equipped with NFC, useful for close-proximity connection tasks.
The design comes in three colors: Sunset Orange, Moonlight Blue and Midnight Black, suitable for many styles.
Processing platform and software
The device uses the MediaTek Helio G81 - Ultra 8-core processor, aiming for stable performance for everyday tasks. Redmi 15C supports RAM expansion up to 16GB and internal memory expansion up to 1TB, increasing flexibility in use.
The device runs Xiaomi HyperOS 2, integrating AI features such as Circle to Search and Google Gemini assistant, supporting smart lookup and interaction.
Camera system
Redmi 15C is equipped with a dual AI camera with a 50MP main sensor, f/1.8 aperture. The 8MP front camera has a flash to support shooting in low light conditions, serving the needs of selfies and video calling.
Main specifications table
| Category | Parameter |
|---|---|
| Battery | 6,000mAh; 33W fast charge; 50% in 31 minutes; 10W reverse charge; Smart Charging Engine (>80% after 1,000 cycles) |
| Screen | 6.9 inch, HD+, 120Hz AdaptiveSync, up to 810 nits, TÜV Rheinland certified |
| Durability | IP64; Wet Touch 2.0 |
| Connect | NFC |
| Dimensions/Weight | 7.99mm thin; 205g |
| Microprocessor | MediaTek Helio G81 - Ultra, 8 cores |
| Memory | Expandable RAM up to 16GB; expandable storage up to 1TB |
| Software | Xiaomi HyperOS 2; Circle to Search; Google Assistant Gemini |
| Rear camera | Dual AI; 50MP, f/1.8 |
| Front camera | 8MP, with flash |
| Color | Sunset Orange; Moonlight Blue; Night Black |
Advantages and technical trade-offs
- Pros: 6,000mAh battery and 33W fast charging; 120Hz AdaptiveSync; IP64 and Wet Touch 2.0; NFC; reasonable weight and thinness compared to the large battery; AI-powered software.
- Trade-offs: HD+ resolution on a 6.9-inch screen; 205g weight can feel solid in the hand; performance is positioned as stable for everyday tasks; the manufacturer does not announce further details about other connectivity parameters.
Compare within segments and choose
In the accessible price range, the 6,000mAh battery configuration, 120Hz screen, IP64 and NFC are notable highlights of the Redmi 15C. If 5G connectivity is a priority, users can consider the Redmi 15R 5G with Dimensity 6300 chip, 6,000mAh battery and 120Hz screen, priced from 4.07 million VND (according to the source). At a lower cost, the Redmi 15C stands out thanks to its battery capacity, 33W fast charging and a durable feature set in a general usage environment.
Price and opening date
Redmi 15C will be available from October 17, 2025 with the following versions:
- 4GB + 128GB: VND 3,490,000 (listed price VND 3,690,000).
- 6GB + 128GB: VND 3,790,000 (listed price VND 3,990,000).
During the period from October 17 to October 31, customers are supported with 0% interest installment payment and enjoy 18-month genuine warranty.
