# Battery Safety and Care

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Blue Robotics has a nice [description of how to keep your batteries working](https://bluerobotics.com/learn/battery-info/) and how batteries work.
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The Wi-Fi module has a simple internal battery protection system to prevent damage your batteries by over-discharging them. The battery will be electronically disconnected when the battery charge falls below 12V, and the battery must be disconnected for at least 10 seconds and a charged battery connected to restart the Wi-Fi. 
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You should follow these steps to prevent damage to the battery:

* Always use a balance charger.  
  * A balance charger compatible with 4S (14.8V) Lithium batteries is required
  * Most users already have a balance charger for their ROV battery.
* Power off the Omnitrack after use using the switch. 
  * Running a battery below the cutoff voltage (<12V for a 4S) will likely cause permanent damage.&#x20;
* Remove the battery from the enclosure whenever practical.
* The supplied battery can run about 10 hours on a full charge. It's good practice to recharge after every use, and to limit the time used to about 5 hours.
* Batteries should be charged to \~60% state-of-charge (SOC) for long term storage. Storage at high SOC (>80%) over time will reduce the battery's usable capacity.&#x20;
* Shipping regulations require batteries to be shipped with less than 30% charge. Charge your battery before its first use.

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IF you use q different type of battery, let us know at Cerulean and we can supply a battery interconnect PCB that does not shut off power at 12V.
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