diff --git a/Battery.md b/Battery.md
index a6f88ee..23291dd 100644
--- a/Battery.md
+++ b/Battery.md
@@ -53,6 +53,7 @@ If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hac
 * Make sure you have updated the number of cells in [config.h](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/blob/master/Inc/config.h) if you use a battery with less cells in series
 * [Calibrate the battery voltage](https://github.com/EFeru/hoverboard-firmware-hack-FOC/wiki/Battery#calibration)
 * With a battery of low quality/bad health, pulling a lot of current will result in a big battery voltage drop and trigger battery low alerts. You can use a better battery or several similar batteries in parallel
+* Check the voltage of your battery when fully charged, if much lower than 42V it could mean some cells are defective (0V)
 * Reducing the [battery low levels](https://github.com/EFeru/hoverboard-firmware-hack-FOC/wiki/Battery/_edit#battery-level-low-alerts) can help but going too low can be risky for your battery
 * You can limit the [current](https://github.com/EFeru/hoverboard-firmware-hack-FOC/wiki/Setup-current-and-speed-limits#current-limit) being drawn to reduce the voltage drop but you will also reduce the power
 * [Debug Serial](https://github.com/EFeru/hoverboard-firmware-hack-FOC/wiki/Debug-Serial) can be used to monitor battery voltage