The discharge response tester is specifically designed for teaching "primary batteries and electrolysis" in middle school chemistry. The host is equipped with a built-in 1.5 V voltage regulator and a digital milliampere meter, with three types of pluggable electrodes: copper zinc, magnesium carbon, and iron graphite. Students can quickly assemble different primary batteries and read the current intensity in real time. Transparent electrolytic cell with a 5cm scale, which can quantitatively compare the effects of electrolyte concentration and temperature on discharge rate; One click lighting/buzzing response, allowing the "electronic flow" to be visible and audible. The whole machine is only palm sized, safe and low voltage, suitable for classroom group experiments and home exploration. Chemical experiment demonstration platform.