General description High-quality, compatible battery with long-lasting cells for use in your power tools. This battery is also ideal as a second battery. EXTENSILO batteries and cells fulfill all operational safety guidelines and provide high performance. Technical specifications Weight: 352 g Battery type: Li-Ion Capacity: 2500 mAh Voltage: 18 V Energy: 45 Wh Colour: black Number of cells: 5 Dimensions (L x W x H): 12.1 x 8.5 x 4.3 cm Compatibility and accessories Compatible with Worx WX166.4, WX164.3, WX166.9, WX166.31, WX164, WX166, WX166.3, WX167 Replacement for WA3511, WA3512, WA3512.1, WA3516, WA3520, WA3523, WA3525, WA3575, WA3578, RW9351.1 Usage Our high-performance, long-lasting replacement batteries have been developed for maximum operating time.