Replacement charge protection PCB for M18 18V 10-cell 18650 lithium battery packs. Key benefits - Restores or upgrades battery pack protection when the original protection board is damaged or missing. - Compact, ready-to-install PCB designed specifically for 10-cell 18650 18V configurations. - Saves time for skilled DIYers and technicians who rebuild or repair battery packs by providing the essential protection circuitry in one component. What this product is - A single charge protection printed circuit board only. No battery cells and no battery housing are included. - Intended for use with 18650 lithium cells arranged as a 10-cell pack to form an approximately 18V battery pack. - Supplied as one PCB unit as shown in the images. Compatibility and function - Compatible with M18 18V-style 10-cell 18650 battery pack configurations. - Provides the PCB functions required for charge and battery protection in such packs. Confirm that this PCB matches your pack wiring and layout before installation. Important product details - Cells supported: 18650 lithium cells only. - Cell count: 10 cells (10 cores) configured for 18V packs. - Package contents: PCB x 1. No battery box and no cells included. - Color and board design may vary due to supplier updates; images are for reference only. - Manual measurement tolerance for any listed dimensions: 0 to 1 cm. Safety and installation notes - Ensure the voltage of each individual cell is equal before soldering or connecting the PCB to the pack. - This product requires experience with battery assembly and soldering. If you are not experienced in battery pack construction, do not purchase this item. - No returns or refunds will be accepted for reasons unrelated to product quality. Typical use scenarios - Replacing a faulty protection PCB when repairing a 10-cell 18650 18V power tool battery pack. - Rebuilding a worn battery pack housing with new cells and a replacement protection board. - Prototyping or custom battery pack assemblies that require a compact charge protection PCB for a 10-cell 18650 18V configuration. Additional notes - This item is 100 percent new and is not an original replacement part from any manufacturer. - If you have questions after receiving the product, contact customer service as soon as possible for assistance. Please verify compatibility and your ability to assemble cells safely before ordering.