Actually Trustfire high quality of 18650 batteries

Protected batteries are significantly longer than unprotected, therefore sometimes the only match with a lot of hassle (or not!) In the charger or even in the corresponding consumer (eg flashlight, etc.). The Trust 18650 fit precisely and easily into the charger (NiteCore i4) and also in the flashlights (ThruNite TN12 and Ultrafire Cree T6). At delivery they have a voltage of 3.85 volts, so come pre-charged and non-empty (see below). Charging needed in NiteCore i4 about 6 hours until the shutdown, the voltage was 4.19 volts. The Cree T6 was (is light pretty warm, but not hot) after 90 minutes of continuous operation noticeably darker, battery showed 3.5 volts already less than the target voltage.

To test the flashlight for another 15 minutes operated until it was completely dark, the tension showed 0 (zero!) Volts. But that does not over-discharging, because that seems to be the control, the battery controls the voltage output to zero before the deep discharge starts at 2.5 volts. Because after only 2 minutes in the charger, the voltage was again at 2.8 volts.

To discharge and capacity: many reviews complain that the capacity of the chinaware is a lie. For this the following measurements: put after full charge in the Torch, it flow 3.4 amperes at 4.19 volts. At 3000 mAh capacity battery design would have to be empty after 53 minutes, but he is not, the output current goes down with the voltage and shows after 45 minutes only 1.6 amps (3.84 volts). One would have an integral place on the discharge curve to determine the exact capacity, but an estimate of the 90-minute operation of the flashlight give approximately 3000 mAh. In other words, the specification of 3000 mAh manufacturer is credible, the price is unbeatable with 7, so I give it 5 stars.

Logically, I can not say anything, I have the battery precisely a few days over the lifetime.