That is exactly what struck me as well, I guess BLE 4 doesn't consume near that much energy as some people (me) think it does. So probably it's the display that consumes the most amount of energy. And since this device also has no notification feature it means most of the time there is no connection to your device.
This is good news to me though, means when I finally come around to making devices/projects I can use BLE and still have good battery life! Now just find a BLE 4 module that's cheaper than the ESP8266.
This is good news to me though, means when I finally come around to making devices/projects I can use BLE and still have good battery life! Now just find a BLE 4 module that's cheaper than the ESP8266.