Hi team

I am quite interested on how do these e-ink labels get 5-year battery life. As they will need to be updated from some kind of controller, so they must be receiving information. Assuming two AAA battery.

https://www.alibaba.com/product-det...pm=a2700.7724857.normalList.46.39e64b881H5ApV

https://www.google.com/search?rlz=1....509.0j3......0....1..gws-wiz-img.03F_N_dbvJs

 

Also this one, it looks like there is an LED and IR receiver on it, what are they for??

https://www.google.com/imgres?imgur...tx=1#h=500&imgdii=TX6R9We4affTxM:&vet=1&w=500

 

This one from Samsung is using CR2450, 5-year battery life

https://fccid.io/2AFWN-ST-GR4300N/User-Manual/User-Manual-3884640