> 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

<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="/files/NghyxzZQuPvyU42MP0k2" 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="/files/QbOp1II0sUOHlamxNV0X" alt="" data-size="line"> <strong>Solid Blue</strong></td><td>Charging</td><td>Battery is actively charging.</td></tr><tr><td><img src="/files/jsCi0mt4GoRUSWI8okZL" 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="/files/tUvkPXWJqalOe3ihWn9V" 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="/files/40l2dlrkQgeL8XrZRS4b" 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="/files/qz2ip3IY64j4eu19ee5m" 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="/files/cgleuTCH0nmadPVqlLto" 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="/files/7xdSFU1Hihkp9buBsLWd" 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="/files/wqbiAHnLv8u9c97BMr9V" 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>