For testing power supplies, batteries and accumulators, an electronic load is a very useful tool. Such a load not only imitates a fixed resistance; it can also act as a constant current or voltage load and can even switch between different load values. The Siglent SDL1020X-E offers a whole range of such capabilites and is suitable for voltages of up to 150 V and currents of up to 30 A, with a maximum dissipation of 200 W.