The algorithm of the indicator of the category of Dive Electronics Photon 1500
When all the LEDs are red, you must charge the battery. If You have not done so, the light force switches into power-saving mode, it will flash red 2 extreme LEDs:
If You then are unable to get to charge, the light will switch into emergency mode "hard" energy savings while still flashing 1 red led, and the brightness will gradually decline:
Akkumulyatorniy to charge battery no need to open the canister. Charging is done using wet contacts. That eliminates the possibility of leakage at the connection.