Battery tester It can display the voltage of each cell of the lithium polymer battery and indicates the remaining capacity of the battery as a percentage value. The LEDs on the side of the battery tell you within seconds whether the battery is full, half-full or empty. Locating beeper / model finder The Lithium Battery Checker uses an integrated sensor to detect whether the model is moving or lying somewhere. Via the adjustable threshold, an acoustic signal can thus be emitted after 1 minute of standstill, so that you can find your model in tall grass or away from the airfield. Undervoltage warning The Lithium Battery Checker can remain in the model in flight, and gives an audible and visual warning when the set threshold for the cell voltage is reached (the standard is 3.50 Volts). This makes it easy to see whether the battery is about to run out when the model flies past. Info Display Various display indicators allow you to obtain a lot of information about the battery at a glance: Total voltage, remaining capacity, cell drift and cell condition. Suitable for all lithium batteries For left- and right-handers: In the settings menu the display can be rotated to adjust the usage. - Dimensions: 54 x 34 x 11 mm - Weight: 16 g.