The first cr2's I bought were labeled LC15266 1000mah 3volt. They would trip the PCB with any atty less than about 3 ohms. Even with attys over 3 ohms they would trip the PCB after about a half hour of use. I then bought the Ultrafires and have not had a problem with any 510 atty. They last me about 5 hours of use.
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