Estimating Energizer Ultimate Lithium (LiFeS2) Battery Capacity
I give background and two data-driven methods to estimate the remaining capacity of LiFeS2 (e.g. Energizer Ultimate Lithium) batteries.
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Internal and External Trail Camera Power
Many trail cameras support both internal batteries as well as an external power supply. When there is only one power source, it’s clear where the power comes from. But what does the camera do when both internal and external power is available? If you use rechargeable batteries inside the camera, and a set of primary batteries in an external pack, which set will the camera use first?
Continue reading →Deep Tech: Will Long Night Videos Damage the Browning Elite HP5 Trail Cameras?
I recently released firmware for Browning Elite HP5 cameras that bypasses a limit of 20 seconds on the length of night time videos. Several folks have asked: “Is this a safe thing to do, isn’t the limit there for a reason?” … Continue reading →
Deep Tech: Trail Camera Detection Zones
Knowing the detection zone pattern can help produce more “true triggers” and fewer “false triggers.” In an earlier post Deep Tech: Trail Camera PIR Sensors I covered some of the details of PIR sensors. Based on feedback from subscribers, though, I realized that I had missed some subtle aspects of the Fresnel lens optics and detection zones for PIR sensors. In this post, I look more closely at trail camera detection zones, and how they work. I also give a straightforward way to find the detection zones in most cameras. I use this method to measure the detection zones for three camera models.
Continue reading →Deep Tech: Rechargeable Li-Ion AA Batteries for Trail Cameras
In this post I look explore capacity vs. temperature and discharge rates for rechargeable Li-Ion AA batteries from TenaVolts, EBL, and Pownergy
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