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]. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/6dfc40c6-3232-4798-a3e7-497b5bdb3d26n%40googlegroups.com.
