The new Von Duprin ALK circuit board (starting summer 2021) uses a different battery holder vs. the old Von Duprin ALK circuit board.
A complete new ALK kit would be required, indicate the Series, Size, Finish, and Switch.
Example: 98-ALK-3'-US26D-RX
If replacing an existing ALK with an existing functional RX or LX switch, order the kit "Less Switch" .
Example 99-ALK-4'-US26D-LESS SWITCH
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