JJC MCR-LR44X15 Battery Storage Box is designed to hold and protect button cell batteries(batteries not included). The storage box is compact and slim, only 16.4mm in thickness. It is sturdy and durable and made of high-strength and environmental-friendly ABS plastic material. The silicone sealing ring provides moisture, water, and dust resistance. Internally, custom-molded EVA sponge pads effectively reduces damage from vibrations and impacts. Additionally, the grid design securely stores internal batteries, preventing them from touching or scratching each other, while also facilitating organized storage and convenient access.Moreover, the ergonomic locking system can realize easily opening and closing. It features a molded eyelet, and the case is easy to carry with a lanyard or a strip(not included).