Have had a 6V external battery attached to the camera with a solar panel, also have rechargeable batteries in the camera. Lasted about six months about 6,000 pictures. Just recently I started to see the battery charge decline so while I was there I charged both the 6V and internal rechargeables. It kept full charge for 3 days with only about 50 pictures being sent. Real-time is turned off. My question is does the camera pull from the internal batteries first then the 6 V or vice versa? Is it smart enough to switch from one power source to the other? None of my settings were changed so confused why the battery has declined so fast and if it will switch over on its own? Any advice is appreciated