To ensure battery safety, you need an isolating unit in line between your starting battery and your lithium house bank. Charging Current: 50A per 100Ah of batteryĬonnecting Your Battle Born Batteries and Lead-Acid Bank with a Battery Isolator.Equalization: Disable if possible or set to 14.4V.Below are some of the common settings you may see and our suggested charging parameters for your Battle Born Batteries. Most of the time you are able to reprogram your existing chargers to match our batteries’ charging profiles. Chargers can vary from one to three stage charging profiles depending on the make and model. You will want to confirm your current charger is able to fully and properly charge your lithium batteries. As a result of these differences, lithium has a very specific charging profile that must be met by your charger. In addition to the voltage difference, lithium is also capable of charging and discharging much faster than lead acid. Charging Parameters for Chargers and Battery Isolators These components will separate the two battery chemistries and allow for a proper charge to go to your lithium house bank. To be able to charge your lithium house bank you will need to place a battery isolator or DC to DC charger in line between the starting battery and your house bank. Please keep in mind that Battle Born Batteries should not be used for cranking applications such as turning over the engine, and you will need to keep your lead acid starting battery in place. As you may be familiar with, to be able to successfully charge your lithium battery house bank while driving you will have to connect it to your alternator and starting battery setup. The most common application of this set up is for alternator charging. When you are looking to interconnect your lithium-ion batteries with your lead acid batteries, the only method we recommend is with a battery isolator or DC to DC charger in line between the two. When to Connect Your Battle Born Batteries and Lead Acid Batteries Please note that these components must meet the technical requirements, including protective measures.Īs a result of the previously mentioned differences, our team strongly suggests you do not tie your lithium battery bank directly to your lead-acid batteries. Without proper components in line to separate the two, the batteries cannot be used in conjunction. When this happens, this creates heating issues within your system arise which can damage your batteries and onboard components.īoth lithium batteries and lead-acid batteries are rechargeable energy storage batteries, but they have very different characteristics. When batteries are not at the same voltage or discharge at mismatched rates, the power flows quickly between them. The voltage difference of the two batteries, combined with the internal BMS within the lithium and lack of BMS within the lead-acid can create a variety of concerns for the health of your batteries and safety of your system. Short Circuit Protection (One time only)Įven though both battery types are classified as a 12V battery, a lead-acid battery sits at a nominal voltage of 12.6V while on the other hand, our lithium batteries sit at a nominal voltage of 13.6V.This ensures battery safety, by verifying the user and battery are not put into precarious situations. Our BMS protects the battery from several potentially damaging scenarios. Across assorted brands of lithium, we do not recommend ever mixing brands because of the BMS (Battery Management System). Mixing battery types and chemistries can lead to a multitude of issues. You run the risk of irreparably damaging your electrical system an can create a variety of electrical hazards. Doing so can be detrimental to your system in a number of ways. Our team of experts at Battle Born Batteries does not recommend that you ever mix batteries’ chemistry, or battery types. Due to this, do not directly combine these batteries in parallel or series. This is because the load characteristics and capabilities of these batteries are drastically different which can lead to safety issues. Why Different Battery Chemistries Don’t Mixįor battery safety, we do not recommend combining different types of lithium batteries and lead-acid batteries. As pioneers in this field, Battle Born Batteries is the go-to resource for lithium tech and battery safety. These are in regards to interconnecting lead acid and lithium ion battery banks. Don’t Keep Lithium Batteries Directly in Line With Your Lead AcidĪs lithium ion technology is becoming more readily available our team has noticed an outpour of questions.

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