The TL-933-DEWALT is the ideal replacement battery for many Dewalt power tools. Chemistry: NICAD. BatteryGuy’s TL-933-DEWALT is a 18 volt 1500 mAh Dewalt 100% compatible Replacement Power Tool Battery. Our batteries and accessories are made with high quality parts and are guaranteed to meet or exceed the original equipment manufacturers specifications at a reduced price. All batteries are tested for Full Quality Control Assurance.