Unlike other, LCD-based room labelling solutions, Joan’s electronic paper display features minimal power consumption: only 1% of that of an LCD, resulting in extreme energy savings when using Joan. Electronic paper’s energy efficiency allows Joan’s lifetime to be counted in months instead of days on a single battery charge.
You can keep track of Joan’s battery status in the Joan Portal, under Device settings > Devices. Here you will see the level of battery power remaining for each of your Joan devices, so that you know exactly when to charge your Joan.
A green battery symbol means that Joan’s battery is fully charged; yellow that the battery level is below 50%; and red that Joan is below 25% battery power and will soon need to be charged.
Don’t worry: you’ll be notified via email when battery levels drop below 20%. See how you can set the address to which this notification is sent here.
When Joan’s battery is genuinely drained, the device will inform you by displaying a screen indicating that Joan needs to be charged and its display will become unresponsive. Simply charge Joan overnight and your door display will be good to go for quite a long time (weeks if we’re talking JOAN Manager or JOAN Executive devices and months if we’re talking JOAN Board).