> For the complete documentation index, see [llms.txt](https://docs.inspiredflight.com/inspired-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.inspiredflight.com/inspired-documentation/products/aircraft/if800-tomcat/emergency-procedures/critically-low-battery.md).

# Critically Low Battery

<mark style="color:orange;">**Critically Low Battery**</mark> is defined as total <mark style="color:orange;">battery percentage</mark> <mark style="color:orange;"></mark><mark style="color:orange;">**under**</mark> <mark style="color:orange;">**15%**</mark> and means the UAS is in danger of not having enough remaining endurance to safely return to home and land (RTL).

<mark style="color:orange;">**Automated Failsafe**</mark><mark style="color:orange;">:</mark> From the factory your IF800 Tomcat **has a&#x20;**<mark style="color:orange;">**Critically Low Battery failsafe enabled that will automatically initiate an auto RTL flight mode at 15%**</mark>, regardless if the aircraft was in a manual or automated flight mode prior to this. The Pilot can switch the flight mode out of RTL after the failsafe was initiated, **however the aircraft will not automatically initiate RTL failsafe again**. If in doubt, manually switch into RTL mode or manually fly the aircraft back to home and land in Position Hold flight mode.

<mark style="color:orange;">**Flying with Critically Low Battery**</mark><mark style="color:orange;">:</mark> The Pilot in Command’s main objective needs to be returning the aircraft to the nearest pre-designated landing zone or home position. The aircraft should be brought to a low altitude as quickly as possible. If the aircraft is approaching Emergency Low Battery the Pilot in Command should adjust the flight path over clear open ground.

{% hint style="danger" %}
Automated flight modes may use slower velocity setpoints than the aircraft's max speed. If in doubt, switch to manual **Position Hold** flight mode to land faster.
{% endhint %}

***


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