Dicovered that Keen Home Zigee vent got batteries leaked inside and battery compartment is completely useless. Disassambled it I see that the connectivity is done via very small plug - here is the lower cernter port with cut wires.
That connecter/plug is just couple of mm across. Could you tell me how it is called so I can find a replacement at Aliexpress so I can use it with series of 4 AA batteries?
The JST connector usually have guiding rails on one side.
This one have a friction lock bump, so it is probably a Molex connector instead, maybe a Pico-SPOX or if the picture is zoomed in a lot, then it is maybe a Pico Blade.
I have DIY battery compartment that I want to connect to the unit using the plug, so instead of soldering it twice (with extension cables) I want to get plug long enough to avoid it.
You current connector does not have a guiding rail, which is the signature of a JST connector.
The friction lock bump is normally a molex thingy.
Both connector brands have several different sizes, so size is not a measurement to go after.
Sometimes the connectors from the two brands can work together, so maybe a JST PH connector can be used even if it is a molex connector soldered on the board.