[VIDEO] How to Store Lithium Batteries for Winter

As temperatures begin to drop, Wired2fish’s own Nick Dumke walks through how to prepare lithium batteries for winter. Whether you remove them from your boat or leave them installed, Dumke outlines practical MillerTech recommendations that protect performance and extend battery life.

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Step-By-Step Storage Tips

When winter arrives, Dumke explains that anglers can safely store MillerTech lithium batteries either in or out of their boats. Around the Wired2fish office, the team often removes batteries when harsh weather or moisture becomes an issue. Once removed, the batteries are stored indoors on a dry surface—preferably a wood plank or piece of carpet to prevent direct contact with cold concrete. Modern batteries are durable, but these small habits add extra protection. Dumke highlights that MillerTech’s quick connect system makes it easy to disconnect the charger while leaving terminals attached, saving time and hassle in the spring.

Ideal Charging Practices

Before winter storage, fully charge your batteries. While the perfect range sits around 50 percent, MillerTech recommends charging to 100 percent to simplify the process. Once charged, bring the charger indoors to keep it out of the elements. During the off-season, Dumke monitors his batteries through MillerTech’s app, checking voltage levels to ensure everything stays healthy.

Inspection and Maintenance

Dumke also stresses the importance of inspecting each battery before long-term storage. Check for corrosion, dirt, or damage around the terminals. If needed, use a wire brush to clean connections and wipe the batteries dry. Clean terminals ensure a strong connection when it’s time to reinstall them in the spring.