SJ5000+ Battery life

Early adopters of the SJCAM SJ5000+ reported poor battery life. Mine arrived with firmware 1.7 loaded and after running batteries through several charge/discharge cycles videoed my watch (indoors at about 17 degrees C). Settings were 1080 60p screen, LEDs and wifi turned off. The battery ran out after 59 minutes. When I've really nothing better to do I'll run some tests on time lapse and on my other two batteries to see if there is any variation. Please feel free to add your own battery test results in comments