Does Rock PI 4B RTC Circuit takes care of recharging the RTC cell?

#1

I have taken a rechargeable cell for the RTC of Rock PI 4B. Does Rock PI 4B will automatically recharge it or I need to build another rechargeable circuit for it?

#2

Do we really need RTC battery rechargeable? Check the rk808 datasheet, the RTC Supply Current is 5uA. You can calculate how long the battery works.

#3

Ok, I am using 235 mAh Button Cell (Maxell LR44 Alkaline Button Coin Cell Battery),
and then

Number of hours = 0.235/0.000005 = 47000 Hours = 5.36 years

Are these calculation correct? :thinking:

If yes, Works for me :grinning: Thanks

Some simple installation questions
#4

I suspect a rechargeable option would be preferrable as these devices mind end up in installations that might not see the light of day for more than 5 years.

Guess i’ll skip the battery for those installs