OK, then just go for it and give it a try :) Tomasz Lewicki schrieb am Donnerstag, 5. Februar 2026 um 12:38:54 UTC+1:
> "Supercap" means supercapacitor? I don't have any... And my knowledge > about electronics is near to zero :) > > According to low battery alarm - I'didn't noticed it on display before so > the death of lithium batteries was sudden and unexpected :| > > czwartek, 5 lutego 2026 o 10:59:57 UTC+1 [email protected] napisał(a): > >> Try a supercap instead of a battery and measure the end voltage. The end >> voltage should be roundabout the same with the supercap and rechargeable >> batteries. It shouldn't exceed the maximum end voltage of the battery to be >> used, and high enough to store enough energy. Given the >> charging/discharging curve of NiZn Anything between 1,6V and 1.85V will >> more or less fully charge the battery without harming it. If under 1,4V it >> is empty and the voltage will dramatically fast so the low batt alarm >> really might not work as one might expect it. >> >> Tomasz Lewicki schrieb am Donnerstag, 5. Februar 2026 um 09:08:42 UTC+1: >> >>> I ordered NiZn rechargeable batteries. I don't think I need to worry >>> about damaging the station due to overvoltage, because - as I checked on >>> the only AA lithium battery I have on hand, which has been sitting around >>> for two years - the voltage on it is exactly 1.79 V. So 1.6 V, even when >>> fully charged, is unlikely to be a problem. I'm more concerned about >>> charging. >>> >>> wtorek, 3 lutego 2026 o 09:20:11 UTC+1 [email protected] napisał(a): >>> >>>> Afaik you could simply use NiZn, which won't fully charge in this >>>> station. Also, the low battery warning will most likely not fit when this >>>> cell is being used. I'd give it a try. Also, you might not want to put >>>> fully charged NiZn cells into your device. >>>> >>>> But absolutely no guarantee you won't ruin the station. >>>> >>>> Tomasz Lewicki schrieb am Dienstag, 3. Februar 2026 um 07:13:53 UTC+1: >>>> >>>>> I would like to ask if anyone still uses the HP-1001/1002 >>>>> (WS-1001/1002) station with the WH24 external sensor. I am having trouble >>>>> finding the right batteries for this sensor. I know it is old equipment, >>>>> but maybe someone will be able to help me. >>>>> >>>>> I got the station from a friend who bought it in 2015 and didn't use >>>>> it because he couldn't install it (he lives in a multi-story apartment >>>>> building). I got it in 2023 and started using it in the spring of 2024. I >>>>> found the original manual here -> https://fccid.io/WA5WH24B (April >>>>> 2013 version). The Polish distributor's manual is from January 2014. It >>>>> contains an important note that is not included in the original manual >>>>> about powering the WH24 with 1.5 V ZnMn rechargeable batteries: "The >>>>> outdoor sensor can only be used with the special ZnMn rechargeable >>>>> batteries with a rated voltage of 1.5 V included in the set." Since I >>>>> didn't have any, I used regular 1.2 V NiMH rechargeable batteries, but >>>>> they >>>>> quickly died during the cold spell, which is not surprising. That's why I >>>>> used 1.5 V lithium batteries. They worked for almost two years, give or >>>>> take a few weeks. But now I have to replace them, which brings me to my >>>>> question for WH24 users - what kind of batteries should I use? There are >>>>> no >>>>> longer any 1.5 V ZnMn rechargeable batteries on the market, but there are >>>>> NiZn batteries with a voltage of 1.6 V. Will these be suitable? Should I >>>>> go >>>>> for lithium batteries again? The thing is, access to the external sensor >>>>> is >>>>> very difficult and I can't easily replace it if something goes wrong. >>>>> >>>> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/60a8433e-16af-4f4a-9026-9aac20863dc1n%40googlegroups.com.
