The TELESIN S0-BTR-09-TGP appears to be a specific model of a GoPro battery charger, likely a pocket-sized, multi-battery charging case designed for action cameras like the GoPro Hero 9, 10, 11, or 12. It features a storage and charging function, allowing it to charge multiple batteries simultaneously, and is designed for portability. Some versions may include an integrated SD card reader and storage for memory cards. 

Key Features & Functions

Multi-battery Charging: The case can hold and charge three batteries at once. 

Portable Design: It's compact and suitable for travel and on-the-go use. 

USB-C Charging Port: Uses a USB-C port to charge the batteries inside the case. 

Battery & SD Card Storage: Some models provide storage for extra Micro SD cards. 

Indicator Lights: Features indicator lights to show the charging status and power level of the batteries. 

Power Bank Functionality: Can act as a power bank, allowing it to charge the case itself via a power bank. 

How it Works

Insert Batteries & Cards: Place your GoPro batteries into the dedicated slots within the case. You can also store Micro SD cards in the integrated slots. 

Charge the Case: Connect the case to a power source (wall charger, laptop, or power bank) using its USB-C cable. 

Charging Process: The case will then charge the batteries placed inside it.