• This 2x20 V battery is compatible with all tools in the Dual Power range, both electric and garden tools. • The battery with Samsung cells has a high capacity of 2500 mAh. • You can use the 2x20 V battery for 20 V and 40 V tools. • If you combine the battery with a 20 V Dual Power tool, you double the runtime. • The 3 LED indicators allow you to check the capacity level, so at any time you can know if you need to charge the battery.