Hi. The first symptom was that when connecting to usb port for charging the light went from orange to green in 3 seconds and would not charge. Then I noticed that once or twice a day, when firing, it would not fire and instead a sign of Check battery would appear. Y did a hard reset, changed batteries, changed cable. Some days it charges but some days it won´t and the Check battery continues to appear sometimes. I found something about checking on escribe the Capacity of batts but it is on 2-cell as it should be. Somebody knows which could be the problem? Thanks. Kind regards. Santiago.