Yolink YS4909-UC Installation & User Manual page 45

Valve controller 1
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Warnings, Continued
AA
Power the controller only with new AA
alkaline or lithium-ion batteries. Do not use
rechargeable batteries, do not use other
type batteries (e.g. zinc blend). Do not mix
old and new batteries.
If storing the controller for extended periods,
remove the batteries.
Please contact Customer Support before
attempting to repair, disassemble or modify
the device, any of which can permanently
damage the device and void the warranty.
43

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