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Hello, New batteries do not work with SolarForce L600 Torch

I have a solarforce L600 torch, and i bought new batteries for it. My old ones died because of my lack of care, so i decided to buy batteries with a protection circuit. I bought UltraFire 18650 3000mah 3.7 v batteries. They fit, and everything matches the original batteries except the new ones have a larger capacity (mah) which shouldnt be a problem. The problem is when i put in the new batteries (fully charged and ready to go) the flashlight does not light up. I at first thought it was the batteries, so i checked the output with a volt meter, and they seem to be fine. i tried the original batteries again in the flashlight and it works fine. So the new batteries do not work for some reason.
Thanks for any response

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SOURCE: How do I replace the lens in a solarforce L600


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