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Dakota Lithium Academy

Explore the Dakota Lithium library of frequently asked questions, how-to guides, and educational videos covering lithium battery basics, charging, installation, system design, and more.

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How to Hook Up Your Batteries

Before connecting anything, determine the voltage required by your equipment and whether you are using a single battery or a multi-battery bank. For a basic single-battery system: Confirm the battery voltage matches the equipment. Connect the positive battery terminal to the positive system cable through appropriate overcurrent protection. Connect the negative terminal to the negative system cable. Verify polarity before energizing the system. Make sure all connections are clean, tight, and properly insulated. For multiple batteries, the wiring arrangement depends on what you are trying to accomplish: Series: increases voltage. Parallel: increases capacity while keeping voltage the same. Use properly sized cable and circuit protection for the current the system can draw.  
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How to Wire Batteries in Series

Use series wiring when you need to increase system voltage. For two 12V batteries: Connect the positive terminal of Battery 1 to the negative terminal of Battery 2. The remaining negative terminal becomes the system negative. The remaining positive terminal becomes the system positive. The voltage adds together while amp-hour capacity remains the same. Two 12V 100Ah batteries = 24V 100Ah Before connecting batteries in series: Confirm the battery model supports series operation. Use matching batteries. Bring the batteries to a similar state of charge. Use a charger designed for the voltage of the completed bank.  
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How to Wire Batteries in Parallel

Use parallel wiring when you want more capacity and runtime without increasing system voltage. For two 12V batteries: Connect positive to positive. Connect negative to negative. Connect the system cables to the completed battery bank. The voltage remains the same while amp-hour capacity adds together. Two 12V 100Ah batteries = 12V 200Ah Use matching batteries at a similar state of charge. Cable length and resistance between batteries should also be kept as consistent as practical to encourage even current sharing.  
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How to Balance a Lithium Battery Bank

If the batteries in a bank are at different states of charge, one battery may reach its protection limits before the others. To rebalance the bank: Disconnect the batteries from one another and from the system. Charge each battery individually using an appropriate charger. Allow the batteries to rest briefly after charging. Check the voltage of each battery. Once they are at similar states of charge, reconnect the bank. Verify system voltage before reconnecting loads. Starting with matching batteries and keeping the bank connected and charged together helps reduce future imbalance.  
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How to Choose the Proper Wire Gauge

Wire size is based primarily on: Maximum current Cable length System voltage Acceptable voltage drop Higher current and longer cable runs generally require larger wire. To size a cable: Determine the maximum current the circuit will carry. Measure the total circuit length. Determine the acceptable voltage drop. Select wire that can safely carry the required current while keeping voltage drop within the desired range. Low-voltage systems, especially 12V systems, can be particularly sensitive to voltage drop. Good terminations are just as important as the wire itself. Loose connections, poor crimps, and corrosion create resistance and heat even when the cable is correctly sized.  
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How to Choose the Proper Fuse Size

A fuse or circuit breaker protects the wiring and electrical system if excessive current flows. To select the proper protection: Determine the normal and maximum current requirements of the connected equipment. Check the equipment manufacturer’s recommended fuse or breaker size. Make sure the fuse rating does not exceed the safe current rating of the wire. Account for normal short-duration surge loads where applicable. Install primary overcurrent protection as close to the battery or power source as practical. Do not simply install a larger fuse because the existing fuse keeps opening. Repeated fuse failures indicate that the circuit, equipment, wiring, or protection sizing should be investigated.  
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How to Troubleshoot a Lithium Battery

Start by determining whether the problem is actually the battery or another part of the system. 1. Identify the symptom Is the battery: Not charging? Not providing power? Shutting off under load? Providing less runtime than expected? 2. Inspect the system Look for: Loose terminals Corrosion Damaged wiring Blown fuses Tripped breakers Heat or discoloration at connections 3. Measure battery voltage Use a multimeter directly at the battery terminals. For a multi-battery bank, disconnect the batteries as necessary and check each one individually. 4. Verify the charger Confirm that the charger: Matches the battery voltage Is compatible with LiFePO₄ batteries Is producing the expected output Is connected with correct polarity 5. Consider BMS protection The battery may temporarily disconnect itself...
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How to Extend the Life of Your Lithium Battery

LiFePO₄ batteries require relatively little maintenance, but a few habits can help maximize service life. Use a compatible charger. Stay within the battery’s published charging and discharging limits. Avoid unnecessary exposure to extreme heat. Do not charge below the permitted charging temperature. Avoid repeatedly running the battery into low-voltage protection when it is not necessary. Keep terminals and connections clean and tight. Secure the battery properly in mobile applications. Disconnect unnecessary parasitic loads during long-term storage. Lithium batteries do not need to be fully discharged before recharging. Partial discharge and recharge cycles are normal.  
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