I have received two 18650 batteries the typical "China-cost production in conjunction with an LED Tasch lamp. In the test with my electronic charger has been found that the alleged 3000 mAh in reality were only kanpp 550 mAh. These here are indicated with 2600mAh and have between While 2600 and 2650 mAh. This is reflected in the price again but for the lamp keeps now also times longer than 30 min. Recommended because the specified performance will actually be achieved.