It’s not recommended to leave your Norsk Lithium battery charger plugged in or keep your battery connected to the charger during winter storage. Once your battery is charged to about 50–60%, disconnect it from the charger and store it in a cool, dry place.
Your Norsk Lithium battery includes a Deep Sleep feature that cuts all voltage to the terminals and helps preserve the state of charge (SOC) while in storage. To prepare your battery for storage, charge it to around 50–60% and activate the Deep Sleep mode. This can be done either by holding the top power management button until three lights illuminate, or through the Norsk Guardian App.
When you’re ready to use the battery again, you can wake it from Deep Sleep using the Norsk Guardian App or with a single press of the top power management button.
More information on Deep Sleep can be found here: https://norsklithium.com/deep-sleep-advanced-battery-storage/