EOS Sentry4 2~8S Battery Checker Balancer,
The EOS Sentry 4 is a quick, clever, and convenient device for checking your battery voltages. This handy little voltage meter is compatible for use with Lipo, LiFe, Li-Ion, as well as NiMH and NiCd batteries. The Sentry 4 shows at a glance the remaining capacity in your LiPo battery pack, cell balance, cell voltages and difference between cells. A unique feature of the Sentry 4 is it's Stand-alone Balance and Discharge Mode for Lithium batteries which is convenient for storing fully-charged packs down to 3.8v. Furthermore, the Sentry 4 also boasts a Servo and ESC tester by connecting a external power supply you can control and test the Servos frequency, Servo test range and ESC settings.