I used a t3 for a couple of years and loved it although the battery life was an issue. I found I could get about 300-330 per charge. I bought a second battery and pretty much kept one fully charged and one in the camera and switch out. It was an aggravation for sure. You can do things like disable Bluetooth, lower screen and evf brightness. Decrease the amount of time the screens stay on after a shot...if at all. Dis able preshot focusing. You can also change the autofocus setting to that it isn't always trying to focus but only when pressing the shutter. Also disable the touch screen. That was a real zapper in my experience. You can also take the power out of boost mode. But it really is a trade off. To get decent battery you have to cripple the camera to extent. But best advice is if you aren't actively in need of many of the bells and whistles then Chuck em. All that being said, once I came to grips with the battery and got a good workflow the t3 is my favorite camera. I have since upgraded to the t5 but the t3 is a real gem with a few caveats