When installing your trailcamera, you should pay close attention to the type of battery that goes into it, so that your camera has sufficient power. The different types of batteries differ in the amount of voltage they supply. If 1.2v batteries are used in a trailcamera that runs on 1.5v batteries, this means that there is 0.2v too little voltage delivered per battery. This makes it appear that the batteries are not fully charged when in fact they are. With some camera traps (e.g. Reconyx), it is possible to specify in the settings which type of batteries are currently inserted, so that the trailcamera takes this into account and therefore also correctly displays the status of the battery.