Masione 18v 2000mAh NiCd Power Tool Battery for Milwaukee Power Drill Tool 48-11-2230 48-11-2200 48-11-2232 Chicago Pneumatic 8940158631 Rechargeable Battery Pack 18-Volts 2000mAh high capacity Ni-Cad replacement battery, fits with 18V Milwaukee Cordless Drill Driver Tools Compatible with Milwaukee 18-Volts tools and chargers, please check the part number and battery size in our listing before you placed the order Products are CE certified, and integrated microchip prevents overcharging & lengthens battery life Notice: Please FULLY charge your rechargeable batteries before use. When in doubt, charge your batteries overnight (8 hours). Please fully cycle your batteries (fully charge, then fully discharge them) at least TWICE before regular use. DO NOT full charge your batteries before storing then for long periods of time. Discharge them as much as possible first. This is the Third Part Replacement Battery, sometimes, it is a little tight when you installing the battery to your tools, but, please don't worry, it is just the normal things, after you installed it for 3-5 times, the issue will be solved, hope this will be OK with you!