Introduction
The Flashstar Portable Bottle Warmer is designed for convenient and efficient warming of baby bottles, ideal for parents on the go. This device features rapid heating, multiple temperature settings, and a rechargeable battery for reliable use anywhere. Its adjustable design accommodates various bottle sizes, ensuring your baby's milk is always at the perfect temperature.
Please read this manual thoroughly before using the product to ensure safe and optimal performance.
Package Contents
- Flashstar Portable Bottle Warmer Unit
- USB-C Charging Cable
- Instruction Manual (this document)
Video: Unboxing and initial overview of the Flashstar Portable Bottle Warmer.
Setup
- Initial Charge: Before first use, fully charge the bottle warmer using the provided USB-C cable. Connect the cable to the USB-C charging port on the device and to a compatible USB power adapter (not included). The battery indicator will show charging status. A full charge can last up to 5 hours or 4-5 heat-ups.
- Bottle Placement: Place the baby bottle into the warmer. The adjustable velcro grip, made of faux leather on the outside and reflective material inside, allows for a secure fit for bottles up to 3.25 inches (6.5 cm) in diameter.

The bottle warmer can be used while charging, providing flexibility.

The adjustable velcro strap ensures compatibility with most bottle shapes and sizes.
Operating Instructions
- Power On/Off: Long press the power button (located below the digital display) to turn the device on or off. The digital display will illuminate, showing the current temperature.
- Select Temperature: Short press the power button to cycle through the available temperature settings. The warmer offers 6 temperature options: 37°C (body temperature), 40°C (warm), 42°C, 45°C (very warm), 50°C, and 55°C.
- Warming Process: Once a temperature is selected, the warmer will begin heating. A red light indicates active heating, while a green light indicates the set temperature is being maintained (thermostatically controlled). The device is designed to heat a bottle in approximately 20 minutes and can maintain warmth for 2-3 hours on a full charge.
- Battery Indicator & Flashlight: The digital display includes a battery indicator to show remaining power. A built-in flashlight provides convenience in low-light conditions.

The digital display shows real-time temperature. A long press powers on/off, a short press switches temperature settings.

The internal temperature control detector ensures precise and real-time monitoring of the milk temperature.
Important Note: Warming time depends on the starting temperature of the milk. Frozen milk or ice-cold milk may take up to an hour to reach the desired temperature.
Maintenance
- Cleaning: Disconnect the warmer from any power source before cleaning. Wipe the exterior with a soft, damp cloth. Do not immerse the unit in water or other liquids.
- Storage: Store the bottle warmer in a cool, dry place away from direct sunlight when not in use.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in constant use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Battery is depleted. | Charge the device using the USB-C cable. |
| Milk warms too slowly. | Milk was frozen or very cold; selected temperature is low. | Allow more time for warming, especially for cold or frozen milk (up to an hour). Select a higher temperature setting if desired. |
| Device does not hold a charge. | Battery degradation; improper charging. | Ensure the USB-C cable and power adapter are functioning correctly. If the issue persists, contact customer support. |
| Temperature display is in Celsius only. | The device displays temperature only in Celsius. | Refer to a Celsius to Fahrenheit conversion chart if needed. (37°C ≈ 98.6°F, 40°C ≈ 104°F, 45°C ≈ 113°F). |
Specifications
- Model: B0DXVLZ3ST
- Product Dimensions: 5.87 x 2.91 x 3.78 inches
- Item Weight: 11.3 ounces
- Battery: 6000mAh rechargeable battery (included)
- Charging Port: USB-C
- Temperature Settings: 37°C, 40°C, 42°C, 45°C, 50°C, 55°C
- Bottle Compatibility: Fits bottles up to 3.25 inches (6.5 cm) in diameter

The compact design and dimensions of the warmer make it suitable for portability and outdoor use.
Warranty and Support
This Flashstar product is covered by a standard manufacturer's warranty. For specific warranty details, returns, or technical support, please refer to the purchase documentation or contact Flashstar customer service directly.
Contact Information: Please visit the official Flashstar website or refer to your purchase platform for the most up-to-date customer support contact details.