I just received 2, 3.0 Volts rechargeable UltraFire batteries for my led flashlight. The info on the battery says that voltage from full charge to empty is 3.6 Volts and 2.0 respectively. The batteries that came with my flashlight were Duracell Ultra 123 3.0 volts. I was wondering if I put the new batteries in will it blow the led? I heard there is 12ms delay till the battery will put out the required 3.0 Volts. Does anyone know if this will be safe to use in the flashlight or will it blow the led bulb?