The cells are very good, but the capacity of 3400 mAh is not reached. According to computer loader is final in all 4 cells at 3100 mAh. The cells were loaded and unloaded several times, the charging efficiency (relative to the amount of energy supplied and removed) is very good. Otherwise, these batteries are a real best buy and no fakes with printed fantasy values like most cells, such as "Ultra Fire". Since the cells are not Protected own these produce such as self-battery modules which are then protected with a compact protective PCB together. In my case, all cells were connected in parallel for an outdoor application which needs to be very reliable, but is running smoothly with 3-4,2V. This cell block was then provided with a protection module. The operating time is considerable and in an unheated mini cabinet outside of Depends.
Apart from the battery life a bit too high given the cells are really great!