I don't rely on the battery guage. I use a digital multimeter. The reason being as follows:1) to read 100%, your battery has to show 1.5 volt or higher in the Moultrie camera. 2)A rechargeable Energizer battery shows 1.2 volt on the package. Testing with a meter they may show 1.2 to 1.28 volt. Put them in a charger will bring them up to 1.38 to 1.44 volt. These batteries at full recharge will only show approximately 75% in a Moultrie camera. I feel Moultrie software was designed to acknowledge the 1.5 or higher voltage batteries. I have 3 of the Moultrie Game Spy D55-IR and they all read the same. Using the meter, when your batteries get down to approximately 1.0 volt, your camera will malfunction or not even work. Sometimes only one battery has to drop to make it fail.The others could still have higher readings.