Hyperion EOS SENTRY 3 2-8S Battery Checker & Balancer w/Store Mode Discharge

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The EOS Sentry3 is a quick, clever and convenient tool for analyzing your LiPo batteries. The Sentry3 shows at a glance the remaining capacity in your battery pack, cell balance, cell voltages and gap. Stand-alone Balance and Store Modes at industry-leading discharge performance. Sentry3 provides the information and tools you need to maintain top performance and reliability from your batteries, and to avoid costly mistakes.

Overall this is a small and light-weight unit, perfectly suited to checking your battery packs on-the-move and then double-checking prior to flying your model the latter being something we all do before flying. The Sentry3 is probably one of the most useful devices available for radio controlled electric model flyers!


  • Supports 2S ~ 8S Lipo Battery
  • Compatible with HvLi LiPo, Standard LiPo, LiFe and NiCd/NiMh
  • Displays the total battery pack voltage with a percentage bar graph for estimated remaining capacity *
  • View screens for Minimum and Maximum cell voltages, and max cell Gap
  • Store Mode allows you to discharge your battery to 3.8V (Discharge rate is a powerful 150mah,This mode does NOT support LiFe battery)
  • Balance Mode tunes your pack for performance automatically
  • 5 ~ 25V auxiliary input voltage check port using JST 2-pin connectors on pack side
  • Large clear display and easy-to-use menu
  • Powers from the the battery pack you connect for testing. No extra batteries needed.

* Estimated remaining capacity percentage is only a guide so pleased judge by remaining voltage.

Store Mode: Allows you to discharge your HvLi, LiPo to 3.8V for storage. Discharge rate for Store mode is 150mah and will cutoff to 3.8V.
NOTE: Display screen turns off when store mode ends. Please disconnect the Battery when finished the Store mode. This mode does NOT support LiFe

Balance Mode: Will automatically discharge the individual lithium-based cells such that they are closely balanced, if balance can be obtained while all cells remain at or above 3.8V.
NOTE: Please disconnect the battery when the voltage of each cells reach almost same.

This battery checker is compatible with JST-XH balance adapter when you use directly otherwise require each type of balance board adapter.

In order to use Sentry 3 with the legacy Hyperion G3 packs with Hyperion-style balance connector, connect the battery Sentry 3 via HP-EOSLBA-26CBL cable + HP-EOSLBA-26HP-B multi-adapter board or HP-EOSLBA-7UCBL cable + HP-EOSLBA-7U-B multi-adapter board. These cable & adapter sets are included with Hyperion 6S and 7S chargers. Hyperion G3 packs produced after mid-2014 and all Hyperion G6 HvLi packs use XH balance connectors and need no adapters to the Sentry 3.

NiMh can be checked between 5V~25V using JST connector. JST connector with cable can be used to make an adapter to other-type pack connectors

This product was added to our catalog on July 9, 2018