i have been using rechargable cr123’s for around 9 months now.
I will never last as long as the normal batteries, but they work ok.
I haev always got one spare so as soon as i get the “station 1 low battery” message up, the spare is charged and later that day, i swap them over.
I do however have a leaking “supercap” in my ISS, and soil station. Remote anemometer is fine at the moment.
I am hoping using rechargeables hasn’t caused the leaks
What voltage are those rechargeables? I see both 3.0 volt (same as the regular battery) and 3.6 volt available, the supercap might not like the 3.6 volt ones.
Checked this morning, the ISS had 3.7v rechargable battery and the anemomenter had a lithum 3.0v.
All my rechargable batteries are eitehr 3.6 or 3.7v, which is good for my torches, but not the stations.
Is is possible that is why the Supercap is leaking. They are rated at 2.7 volt, you are a full volt over that. I have look for higher voltage but they do not come in that size. Most are either 2.7 or 5.0 volts
The Davis Vantage Pro2 requires a 3.0 volt Lithium Battery (Non Rechargeable).
The difference between Lithium and Lithium Ion is that the Lithium is NON Rechargeable,…and the Lithium Ion is rechargeable.
The solar panel on the Davis Unit ISS charges the Capacitor, not the battery…once the capacitor is out of juice…the battery is there for backup power. on most days the solar panel can charge the capacitor enough to make it through the entire night time hours, this is why the battery also last so long.
most likely, and I am guessing here…during the winter time when we get down to around 9 hours of daylight around X-mas time, is when the capacitor comes close to getting a good enough charge during the daytime to make it through the entire night.
I dont think it is a wise idea to place a 3.7 volt or any other volt… than the recommended 3.0 volt that the Davis ISS Requires.
I got the low battery message today, that 03-2019 battery was down to 2.832 volts, so that’s only 6 months since it was installed. This VP2 ISS doesn’t get much sun but even so I don’t recall ever losing a battery that quickly before
Just changed a leaking super cap from a soil/temp. transmitter, after “eating” two batteries. Both batteries lasted for about 2 months each, I first suspected the solar panel since it lost the glossy look after 2 years of operation, but on a closer look I found the cap. I should have ordered more than one when I did but?.. sure a 3.6 V rechargeable puts a strain on the cap since the circuit is designed for 3.0V .
Peter
Interesting, I tried yesterday, and again after seeing your post, and get this notice:
[color=red]Dear Customer,
At 3:30 AM on 2/17 there was a fire in our building that has forced us to temporarily suspend operations. As a result we are not accepting new orders at this time. We value your business and are working diligently to restore full service as quickly as possible. We do not yet have an estimate as to when we will be able to ship orders but we will be posting updates regularly to this space.
just an update on the batteries I bought, around the same time you did from the junction. Mine are still both working…“knock on wood”. I placed one in the Davis ISS unit and also the Davis Anenometer Transmitter kit unit.