The Imalent MRB-217P40 is a high-performance 21700 lithium-ion battery specifically engineered for high-drain devices like the Imalent MS03.

Technical Specifications

Key Details & Features

• Protection Circuit: The battery features a built-in high-performance circuit board that automatically protects against overcharge, over-discharge, and short-circuiting.

• Physical Size: Note the 75 mm length. A standard 21700 cell is typically 70 mm; the extra 5 mm accommodates the USB-C charging hardware and protection PCB. It may not fit in standard chargers or devices not designed for "long" protected cells.

• High Discharge: The 35A continuous discharge rating is essential for "Turbo" modes in high-lumen flashlights, which can draw massive amounts of current that standard 10A or 20A batteries cannot handle safely.

Lithium-ion Battery warning: All Li-ion batteries have a risk of fire and/or explosion. Handle batteries with care, ensuring not to overcharge or over discharge, even if the battery contains a protection circuit. If battery is visibly damaged, stop use immediately and dispose of appropriately (Li-ion batteries pose a serious fire risk if thrown into household waste). If a battery is not to be used for over two weeks, store partially charged (30-50%) for maximum capacity retention.