You are right. This may be useful in some cases as for me, or a major drawback in others. Sorry for the imprecision. Paul
Le Friday, February 6, 2026 à 5:53:49 PM UTC+1, [email protected] a écrit : > But you can't charge these batteries via their terminals, can you? They > have USB-C charging connectors. > [email protected] schrieb am Freitag, 6. Februar 2026 um 12:33:37 > UTC+1: > >> For about a year I used Zithion and Ausmann Li-Ion batteries, with good >> success. They incorporate a voltage controller in the AA that helps for >> both charging and discharging. The "apparent" discharge while unused is >> very low, 5-15 % per month. and the output voltage is very stable while in >> use. I measured 1.54 V. This stability is important for stations that are >> voltage sensitive , generally for Pressure or humidity that are not well >> compensated (I use a Irox PC2 station, aka Honneywell 923). >> Only drawback, they are expensive, but their prices are dropping >> regularly. >> >> >> >> Le Thursday, February 5, 2026 à 4:26:41 PM UTC+1, [email protected] a >> écrit : >> >>> 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]. 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