Battery Voltage Alarms

[Bravedan 106]

OK, so I use FrSky and they have sensors to connect to the battery pack balance port to feed back via telemetry. Other makes have similar, though usually more expensive. WIth my Horus on OpenTX telemetry can be arranged to provide an at a glance colour coded indication of battery state, overall AND per cell.

But what if you don't have a telemetry radio? Here's one way!

There are cheap small battery monitor alarms, self contained little units which plug onto the balance port. Some of these have adjustable voltage trip level (per cell) and are extremely loud.

Set correctly they provide early warning of pack depletion under in use throttle surges plenty early enough to position and land with no urgency, and can be heard over a great distance.

One very suitable unit is:-

https://www.banggood.com/G_T_Power-Voltage-Tester-Low-Voltage-Buzzer-Alarm-For-1-8S-LiPoLi-ionLi-MnLi-Fe-Battery-p-1136769.html