I am currently testing a camera trap with rechargeable Li-ion batteries and untill a week ago they were doing much better than the NiMH rechargeable batteries that I used before. The camera has been working for about 5 months, taking on average at least 2 images and 2 20-second videos during daytime ( in fact taking many more, including night time images and videos but I don't have any averages readily available in my head ) and a week ago it still reported three bars out of three on the battery indicator.
Today, I checked the camera trap and the batteries were completely drained. 6 out of 8 were completely drained, down to about 0,015V, and 2 still had a charge of 1 V.
What puzzles me is that it happened in the time of a week. Some hypothesis:
- It is how this type of batteries behave?
- The camera trap's indicator is faulty. Could be but it is a new one, so I don't think so ( Coolife H881 old model without any wireless capability, no wifi, no bluetooth, no mobile. )
- This is only the first cycle of the batteries which were bought in July ( Security Zone A2U-22 23000mAh / 3400mWh ). I don't even know if these batteries need to go through a couple of charges before they reach their optimum.
- The weather ... it has been raining steadily for a couple of weeks. Almost daily, between 3 to 5 or more hours. For sure it has been far more humid in January than in previous months. However the camera has an IP rating of 67. That does perhaps not say a lot about resistance against air humidity, but it should be good for something - or should it not?
I would appreciate any and all feedback.