Several months ago, after multiple attempts at Firmware adjustments, Wyze sent me a replacement WCO.
My original WCO had degrigated from about weeks battery life to 3+ weeks.
I have since posted comparisons between the old and new cameras. In a nutshell, if kept inside and away from any motion, battery drain is around 1% daily. Having a SD card inserted does not affect this.
I have both cameras mounted outside. In general, it first appeared that the colder the temperature, the worse the battery life. The first period I had the SD card in the new camera, then switched it to the old one 3 weeks ago.
In both cases, regardless of initial burn down rates, both cameras were below 20% after three weeks. The reached 50% in 2 weeks. Some days were 3%, some were 6%, once per period there was a 10% day on the old camera. Eventually though, they both reached 20% around the same time.
Now with the weather much warmer, around 70 the past few days, things are not any better. I fully charged them Sunday night. Old starts at 99, new at 98.The old is now at 93, new is 90, after 48 hours.
I have no way to know how old the “new” WCO battery is.
What I do know, the WCO is not designed for the battery to last as advertised if monitoring areas with regular activity. Temperature changes do appear to affect the battery life, regardless of activity.
The PIR Area is used to wake the WCO up. The range is about 30 feet maximum to detect initial motion. The additional Detection Zone will not wake the WCO, it will come into play after the WCO wakes up. This means, you must take advantage of the mount to position the PIR Area to where you want to detect motion.
Do not mount the WCO somewhere that is awkward to get to, or awkward to position the WCO. Every time you remove the WCO to recharge it, you will have to reposition it again. Even if you recharge it in place, you will end up moving it enough to have to adjust it again after removing the cord.