The Lithonia Lighting Quantum Thermoplastic LED Emergency Exit Sign features an engineering-grade thermoplastic housing that is impact resistant, scratch resistant and corrosion proof. This exit sign uses LED light bulbs and has a nickel-cadmium battery. Innovative snap-together design allows installation in less than three minutes.
You will need to locate the product date code off the white label from the inside of the unit. There are 3 different batteries depending on the product date code. If you take this code to the Pro Desk of your local Home Depot store they will be able to assist in the exact replacement battery needed. Thanks for your question!
My experience is that although Depot carries some batteries, the one for this particular sign they do not, BUT, it is very easy to take out and take to a Battery store to have rebuilt or replaced. You do not have to take the unit down, it is behind the removable front cover plate.
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Can I get this sign in black
about Plastic White LED Emergency Exit Sign with Battery on
You will need to locate the product date code off the white label from the inside of the unit and take it to the Pro Desk of your nearest Home Depot location. They can provide you with the correct battery. Thanks for your question.
You are right, specifications do not indicate what the primary power is. However, as a "battery backup" type device, one would have to preclude that there is a primary power source to keep the batteries charged until they are needed and that the most common power source for this type of sign would be 110 vac.