Before opening up a Steam Deck to perform internal repairs, Valve recommends enabling battery storage mode for increased safety and to minimize any risk of damage to the device. If you're enabling battery storage mode for long term device storage instead of repairs, discharge (or charge) your battery to 50-60% before enabling storage mode.
Navigate to the Power menu. Select Battery storage mode. Select Yes to confirm. Your Steam Deck should now power down into storage mode. When in storage mode, your Steam Deck won't respond to power button presses. To exit storage mode, plug your Steam Deck into the charger. To exit storage mode, plug your Steam Deck into the charger.
It's also been said to reset the deck firmware, which can help clear some bugs. The whole meaning for storage mode is: The manufacturer charge the battery to around 50% Enable storage mode. (less consumption of electricity) and prevent the steamdeck from accidently turn on while shipping. From manufacturer to warehouse and then to your home.
To support battery health, Dell batteries enter storage mode which is an auto protection feature that limits power and auto shuts down, this helps to preserve battery capacity, and does not over drain the battery. This feature has been on all Dell Computers and batteries since 2014.
Navigate to Setup Utility. Navigate to the Power menu. Select Battery storage mode. Select Yes to confirm. Your Steam Deck should now power down into storage mode. When in storage mode, your Steam Deck won't respond to power button presses. To exit storage mode, plug your Steam Deck into the charger.
The battery enters storage mode once the battery is low or at a maximum of three weeks of non-usage. After the battery is in Storage mode, the CMOS battery is used to keep the time and Custom BIOS settings. The CMOS battery lasts for approximately sixty days if fully charged. After this time, the Bios will lose its Custom settings.