> For the complete documentation index, see [llms.txt](https://aedrox.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://aedrox.gitbook.io/docs/flight-controller/interactive-blocks/ardupilot/battery-monitor.md).

# Battery Monitor

Battery and current monitoring are active and set by default.

{% hint style="info" %}
CONFIG > Full Parameter List > BATT
{% endhint %}

### Voltage sensing 

**BATT\_MONITOR** : 4\
**BATT\_VOLT\_PIN** : 10\
**BATT\_VOLT\_MULT** : 11    (can be lightly adjusted)<br>

#### Optional Parameters

**BATT\_ARM\_VOLT**  : Voltage level required to arm the aircraft / new flight\
**BATT\_LOW\_VOLT** : Low voltage level (used for failsafe/first level) \
**BATT\_CRT\_VOLT** : Critical voltage level (used for failsafe/Critical level)\
**BATT\_FS\_LOW\_ACT** : Action the vehicle should perform if it hits the low voltage level **BATT\_FS\_CRT\_ACT** : Action the vehicle should perform if it hits the critical voltage level

***

### Current sensing

**BATT\_CURR\_PIN :** 11\
**BATT\_AMP\_PERVLT :**  Value defined by the ESCs<br>

#### Optional Parameters

**BATT\_CAPACITY** : XX mAh. : 5000 for a 5A battery / If set, you can get battery percentage value. But ! The drone will only count down the percentage from 100%. It will consider that each time you connect a battery, the battery is full. (even if empty) \
**BATT\_ARM\_MAH** : Remaining Amps required to arm the aircraft / new flight\
**BATT\_LOW\_MAH**  : Battery capacity at wich the low battery failsafe is triggered\
**BATT\_CRT\_MAH**  : Battery capacity at which the critical battery failsafe is triggered<br>


---

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