Keypad power and connected to app

the battery for the keypad only seems to be good for four months. is it wise to always leave it connected by the little usb port to the power outlet?
and i thought i added the entry pad to the app on my phone but do not see it. should i add it again?

Boy…. I wouldn’t. My keypad shows it fully charged even when it’s dead ( good job Eufy) so I just plug it in when I charge some other cam off the homebase USB port on a random basis. I would say maybe every 3 months or so. Easy

Not sure about the other thing…. Does the keypad work? If it does… leave it alone.