All About Low-Voltage Disconnect

May 03, 2024

kevingerman|MattShuraBatteries|Battle Born Batteries|Battle Born Batteries|kevingerman-300×225|PXL_20220607_145413887|State of charge compared to voltage chart

Battle Born Batteries have been created with inherent safety precautions to ensure protection from dangerous operating conditions. One of these features is low-voltage disconnect (LVD). When your battery voltage drops below a safe limit, the BMS will shut the battery down before damage can occur. This ensures that your battery will remain functional and you will remain secure.

What is Low-Voltage Disconnect?

Low-voltage disconnect (LVD) is a feature of our proprietary Battery Management System (BMS), wired internally inside all Battle Born Batteries. LVD and the other safety features programmed into the BMS exist to protect your investment and preserve the life of your battery. When a Battle Born Battery is discharged, the BMS will detect if the battery’s voltage falls below 10V. If this occurs, the BMS will disconnect the battery and shut down all functions. This prevents any charge from leaving the battery, which protects it from damage. Once a Battle Born Battery enters LVD, it will not dischargeToto get your battery functioning correctly again, it will need to be jumped with another 12V source to “wake up” the battery. To help preserve the battery's lifespan, it should be "woken up" within five days of entering LVD. Leaving the battery at a 0% charge for too long can damage it and void your warranty.

How to Wake Up Your Battery from Low-Voltage Disconnect

Battle Born Batteries plugged into a multimeter

To wake up a battery that has gone into LVD, disconnect all connections from all batteries.
Wait for 30 minutes, and then check the voltage of each battery individually. Label each battery and write down the voltage.
If a battery has a voltage over 11.5V, charge it with a lithium charger.
If the battery's voltage is below 11.5V, connect it to a car, just like you would jump a car battery, and let it idle for 15 minutes.
After 15 minutes, turn the car off and check the battery voltage. If it's over 11.5V, charge that battery alone with a lithium charger. If the voltage is still below 11.5V, contact tech support.
Before wiring batteries back together, let them sit alone for 30 minutes and check their voltage. If they have a voltage over 13.4V, they are complete. If not, charge them again and repeat this step.
Once you fully charge each battery individually, you can wire them back together into the system. Remember that battery voltage corresponds with state of charge (SoC) as follows:

State of charge compared to voltage chart

LVD is a critical protection for your Battle Born Batteries, and understanding it can save you a lot of time and money. If your batteries go into LVD often, it may be a sign that you should expand your battery system.

Want To Learn More About Low-Voltage Disconnect and Lithium Batteries?

Building or upgrading an electrical system can be overwhelming, so we’re here to help. Our Reno, Nevada-based sales and customer service team is at (855) 292-2831 to answer your questions! Also, join us on Facebook, Instagram, and YouTube to learn more about how lithium battery systems can power your lifestyle, see how others have built their systems, and gain the confidence to get out and stay out there.