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Keycard Shell uses a replaceable 900 mAh BL-4C battery, designed to last for years. The battery is commonly used for older Nokia mobile phones and various other portable electronics. You can find the battery in many electronics stores or online.

note

The battery itself does not carry an independent dust or water resistance rating. Any protection against dust or moisture is provided by the device enclosure, not by the battery.

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An image highlighting the location of the battery slot groove

1
Remove the Keycard from the Keycard Shell to turn it off.
2
Gently press and slide the Keycard Shell back cover downward to remove it.
3
Lift the battery out using the groove in the battery slot. You can use a small tool or the corner of your Keycard to help pry it out.

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An image showing a battery and the Keycard Shell battery slot

1
Insert the new battery into the Keycard Shell battery slot, ensuring the contacts align correctly.
2
Slide the back cover until it clicks into place.

tip

If your Shell doesn't power on when you insert the Keycard, check the battery alignment or connect a USB-C cable to charge it.

Last edited

17 Sept 2025

In this document

Remove the battery

Insert the new battery

#Replace your Keycard Shell battery

#Remove the battery

#Insert the new battery

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