This battery converter is especially designed to convert lithium battery of different brands, enabling you to enjoy the benefits from extended run-time of lithium batteries on your existing 18V tools. The maximum initial voltage of battery (without workload) is 20V and the normal voltage is 18V.Features:Mainly made of high-quality ABS material, wear resistant and durable to use.The quality cooling system features stable and high-performance heat dissipation function.It solves the problem of converting lithium battery of different brands and can also be used for emergency use.It is a lithium battery converter only and doesn't support battery charging function.Multiple types for your option according to different needs, practical 18V-20V lithium battery converters.Specifications:Type: Type 17/ Type 18/ Type 19/ Type 20 (Optional)*Type 17: Replacement for converting Hansch to Metabo*Type 18: Replacement for converting Hansch to Makita*Type 19: Replacement for converting BLACK+DECKER to Metabo*Type 20: Replacement for converting BLACK+DECKER to MakitaColor: BlackMaterial: ABS + PBItem Size: Approx.Type 17: 10 * 7.8 * 4cm / 3.94 * 3.07 * 1.57inType 18: 9.8 * 7.8 * 4.3cm / 3.86 * 3.07 * 1.69inType 19: 10 * 8 * 4cm / 3.94 * 3.15 * 1.57inType 20: 10 * 7.8 * 4.3cm / 3.94 * 3.07 * 1.69inItem Weight: Approx.Type 17: 102g / 3.61ozType 18: 107g / 3.76ozType 19: 103g / 3.64ozType 20: 108g / 3.80ozPackage Size: Approx. 11.5 * 8.8 * 5.5cm / 4.53 * 3.46 * 2.17inPackage Weight: Approx.Type 17: 137g / 4.83ozType 18: 142g / 5.01ozType 19: 139g / 4.89ozType 20: 143g / 5.03ozPackage List:1 * Converter