which bupbat you are using? The polyacene capacitor type is not supposed to provide nearly as long a backup as the original LiMg cell. Anyway I'll try to find the data and do the math how long actually

to start with:


PAS414 CAP PAS COIN-TYPE 3.3V 0.07F
0.07 As/V * 3 V * 3 V = 0.63 VAs; aka Ws aka J (actually * 0.5 since voltage drops linear with discharge)
0.63 Ws / 7.2E-6 W = 87.5E3 s = 24 h (* 0.5; assuming the capacitor could power the VBRTC domain until voltage = 0, so actually probably another time half of that, ~6h in the end)

Anyway BB_CFG register reset default is 0b00000000, for polyacene cap PAS414 (!!!) I suggest setting it to 0b00011111 as soon as possible during boot