There are a number of things that could contribute to having a shorter battery life than our estimations:
Our battery estimations are calculated using the camera factory settings. If you change white balance, add flicker filters, or adjust any other of your camera’s settings it can have an effect on your camera battery life.
Check if your camera has the newest firmware version. The firmware version on your camera can be accessed by going MENU -> Setting -> More -> Firmware Version, please check that it matches up with the newest firmware version on our website
Your battery life can vary depending on the environment you are filming in. The estimations in our time lapse calculator are done under 77 °F (25 °C) conditions. Extreme temperatures can affect the longevity of your batteries.
Frequent lighting changes can also affect the longevity of batteries and our battery life estimations have been calculated in a stabilized lighting environment.
4.Age of battery and camera
Rechargeable batteries have a finite lifespan and as you continuously recharge the battery it will slowly degrade. Battery estimations on our website are calculate with brand new batteries and not ones that have had prolonged use.