Best rechargeable cr123 batteries9/12/2023 Much less frequent once the scope has warmed up. ![]() And owning IR thermals, I can tell you that warm up takes a while and the NUC requirements at start up are frequent. On cycling the scope on and off between target opportunities, a VP from IR Defense told me that for their thermals, depending on the frequency of the cycling, it is very likely that you will get longer battery life just leaving the scope on because start up drain is high. I haven't used any of them, so it may be because of higher drain, or to prolong change out interval. If you look at various options on the military side, some of them do have more capacity. I think weight and bulk have a lot to do with limiting the battery capacity. Rechargeable batteries typically have a higher voltage when fully charged than a non rechargeable version and when empty have a lower voltage than a non rechargeable. The problem as I understand it is voltage fluctuations between a fully charged battery and an empty one. ![]() If ya consider the real numbers, over the ~1200ish round useful life of a $3-600 quality barrel, you only got to use it for like 1.5 seconds or some such. Not sure how the slight increase in power cycling like that may effect that battery life.Īnd as a side note about "math best not thought about" this somehow reminds me of a competitive bench rest rifle barrel. That said, when my intended scenario of a spotter/scope situation comes to fruition, in theory I may only be powering the scope up when a potential target is located with the spotter? Which would mebbe result in only needing a short battery life and shifting the priority to less bulk/weight. I'm just curious where the relatively short life of the on board power is useful. Good point about the extra power being an option. I aim to be less ignorant as I go thru this life. Stuff like this just piques my curiosity. But I may be mistaken.Īnother point may be that if the battery compartment was made to fit a rechargeable, with the weight difference there being pretty negligible, how much weight would the voltage leveling circuitry really add to the unit? And could this still allow for the use of one time use batts? I'm sure it's been hashed out in design. It was my understanding that the newer rechargeables had on board circuitry to help with those voltage levels over the life of a discharge. That overcharge/power condition was mentioned in one of Mr Wig's posts I believe concerning freshly charged batteries. Enough that it was somewhat overwhelming. I've seen a dizzying array of data concerning voltage output of various batteries both rechargeable and single use. Yessir, a lot of that makes perfect sense. I'd rather be able to bolt on a larger fuel tank when wanted easily vs HAVING to carry it around at all times. ![]() As to why they don't just include that circuitry in the scope itself and replace that 5 gallon gas tank with a 45 gallon version. The reason the rechargeable pack works is the circuitry that keeps the output voltage much more steady than individual batteries. 3v over the max input voltage and cause the magic smoke to escape. This may cause an overloaded circuit by being. Now if you use rechargeables they may start full at 5.6v and finish empty at 3.0v. For example, and I'm making numbers up for this example: your thermal scope has a voltage input range of 5.3v to 3.2v and 2 standard non rechargable cr123's provide a voltage range of full at 5.2v and empty at 3.4v. Lots of electronics are pretty sensitive even to small voltage changes outside of what they're designed for. Click to expand.The problem as I understand it is voltage fluctuations between a fully charged battery and an empty one.
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