> 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/if800-batteries/ib388-battery-overview/ib388-battery-indicators-and-error-lights.md).

# IB388 Battery Indicators & Error Lights

This chart demonstrates the meanings of the different LED Indicators for the IB388 battery.

<table><thead><tr><th width="177.0001220703125">LED Indicator</th><th width="152.6666259765625">State</th><th>Description</th></tr></thead><tbody><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FLbKSNe9lIj68hBWI3rUO%2Fimage.png?alt=media&amp;token=1dadfefd-fbed-4b2e-87d1-af06f179536f" alt="" data-size="line"> <strong>Flashing Green</strong></td><td>Active (On)</td><td>Battery is powered on. Number of blinks indicates charge level (4 blinks = 75-100%).</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FbTDvpvm3RbOtGbnw1VQn%2Fimage.png?alt=media&amp;token=c2646572-e8c8-484c-bb02-4dcb4a91da4e" alt="" data-size="line"> <strong>Solid Blue</strong></td><td>Charging</td><td>Battery is actively charging.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2F8rksj7Eh8yospAXfV1AI%2Fimage.png?alt=media&amp;token=40bff10a-f9d7-4742-80cc-c05e2343dc35" alt="" data-size="line"> <strong>Flashing Blue</strong></td><td><p>Charging (Balancing Cells)</p><p></p><p>Self-Discharge Mode</p></td><td><p></p><p>Battery is balancing cell voltage while charging.</p><p></p><p></p><p>Battery is discharging to storage voltage (40%) after being above this level for over <strong>72 hours</strong>. The battery will warm up during this process.</p></td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FIkO9PiODaSOyy7bRqdXW%2Fimage.png?alt=media&amp;token=2738d6f4-1da6-44a4-b596-30164430e5e3" alt="" data-size="line"> <strong>Solid Red</strong></td><td>Active BMS Error During Flight</td><td>A Battery Management System (BMS) error was detected while that battery was in use. If pressing the status button does not clear it, contact <a href="https://www.inspiredflight.com/support-services">IFT Support</a>.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FjnfbhA2CpI1RA4QAC7pW%2Fimage.png?alt=media&amp;token=2de7ecc7-1620-4db0-953d-9b88d52b208b" alt="" data-size="line"> <strong>Flashing Red</strong></td><td>Active BMS Error</td><td>An unresolved error is still present. If pressing the status button does not clear it, contact <a href="https://www.inspiredflight.com/support-services">IFT Support</a>.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FoSzPFpmOgXam6qDklpQb%2Fimage.png?alt=media&amp;token=786e6cd4-4672-4dff-8ea4-9d3f32cd99b3" alt="" data-size="line"> <strong>Alternating Blue &#x26; Red Flashing</strong> </td><td>Wake-Up Error</td><td>Error occurred while waking from sleep mode. Ensure nothing is connected and press the button once. If it persists, contact <a href="https://www.inspiredflight.com/support-services">IFT Support</a>.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FcxdP0FjzshzmXFrci8VU%2Fimage.png?alt=media&amp;token=172f0b3f-0775-4255-9c2d-f2373da186c4" alt="" data-size="line"><strong>Solid Green</strong></td><td>Fully Charged</td><td>Charging is complete, and the battery is ready for use.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FSH3fOhQjXGVecnTdoEa4%2Fimage.png?alt=media&amp;token=9dfc2d05-dc28-4296-9bde-90ab276010e2" alt="" data-size="line"> <strong>Flashing White</strong></td><td>Enter Sleep</td><td>Battery is entering deep sleep mode.</td></tr><tr><td><img src="https://240141666-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMePZ0UIa6VYv9VbYu4u%2Fuploads%2FS1blv7MRbidisglaqwc0%2Fimage.png?alt=media&amp;token=cbff1f7f-4b3c-4f76-a361-c31510f95bcf" alt="" data-size="line"> <strong>No LED (Off)</strong></td><td>Sleep Mode</td><td>Battery is in sleep mode. Press the LED button once to wake.</td></tr></tbody></table>