"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/1f6072a2-1c95-4385-8c07-74ee04d8ebc2n%40googlegroups.com.
