Skip to content
Both Auckland and Wellington stores are open
Both Auckland and Wellington stores are open

Hyperion HP-EOS08SENT4 EOS Sentry 4 Battery Checker & Balancer 2~8S, with Discharge Mode & Servo Test

Original price $59.95 - Original price $59.95
Original price
$59.95 - $59.95
Current price $59.95

Hyperion HP-EOS08SENT4 EOS Sentry 4 Battery Checker & Balancer 2~8S, with Discharge Mode & Servo Test

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.

The Sentry 4 provides you with all information and tools necessary to maintain and keep your packs performing. Avoid costly mistakes and increase battery reliability by using a high-quality battery checker.


  • 2S ~ 8S Lithium Battery compatible with HvLi LiPo, Standard LiPo, Li-Ion and LiFe
  • 4S ~ 8S Ni-Cd/MH batteries support
  • Built-in Servo and ESC Tester
  • EOS Sentry 4 displays the total battery pack voltage and a percentage bar graph for estimated remaining capacity.
  • View screens for Minimum and Maximum cell voltages, and voltage difference between max and minimum cell.
  • Convenient Balance and Discharge function.
  • Parameter settings
  • Clear display and easy-to-use menu
  • Powered from the battery pack you connect for testing. No batteries needed for device.


  • Dimension: 85.4 x55 x 16mm
  • Weight: 52.4g
  • Lithium battery input: 2S - 8S (HvLi LiPo, Standard LiPo, Li-Ion and LiFe)
  • Nicd/NiMH input: 4S-8S
  • Discharge cut-off setting range: 2.000 - 4.200V
  • Servo Test Frequency setting: 50Hz, 60Hz, 100Hz, 125Hz, 200Hz, 250Hz and 300Hz
  • Servo Test Signal Range setting: 500 - 2500us or 1000 - 2000us
  • Sound switch setting: on , off

This battery checker is compatible with JST-XH balance adapter

  • WARNING: Do not keep your battery connected to the Sentry4 for long periods of time. Since this unit is powered from battery source, the parasitic draw while on standby will consume your battery, thus your battery will over-discharge. Once discharged and stored, disconnect the Sentry 4.

    For Servo & ESC tester function, we suggest to use with 1000 - 2000 pulse setting. Also please set frequency value at 50Hz if you are not sure your servo's specific frequency.