Portable Battery Denver PBH-4003S 4000 mAh

The Denver PBH-4003S is a portable battery with an integrated hand warmer and 4000 mAh lithium-ion capacity. Designed in a compact silver housing, it provides both device charging and a warming surface with an operating temperature range of 35°C–52°C. The powerbank has one USB-A output and one USB-C port for charging and recharging, and includes a 30 cm charging cable for convenient transport.

Advantages

This compact unit combines a 4000 mAh powerbank and a hand warmer in a single accessory, enabling simultaneous warming and charging of devices. The hand warmer offers a steady heat range from 35°C to 52°C. Fast charging is supported via a 10W USB-A output and Type-C input (DC 5V/2A). The included 30 cm cable and lightweight silver design enhance portability for daily use.

Suitable for

• Outdoor activities in cold weather (walking, commuting)
• Travel and short trips where both heat and device power are needed
• Everyday use for smartphones, headphones and other small electronics

Key specifications

• Battery capacity: 4000 mAh (lithium-ion)
• Output: USB-A 10W
• Input: USB-C DC 5V/2A
• Hand warmer temperature range: 35°C–52°C
• Number of simultaneously connected devices: up to 2
• Included cable length: 30 cm
• Colour: Silver

How to use

Charge the powerbank via the USB-C port using the supplied cable until the indicator shows full. To activate the hand warmer, press the power button according to the device instructions and select the desired heat level if applicable. Connect a smartphone or other compatible device to the USB-A output to begin charging. Monitor the battery level to avoid full discharge and recharge the unit as needed.

Recommendations

Use the hand warmer function on low-to-medium settings for extended warming periods and conserve battery when charging devices. Avoid exposing the product to water and extreme temperatures; follow manufacturer guidelines for safe charging and storage.