I'm trying to connect 3 Tenergy lithium 18650 3.7 volt batteries together, for a 12 volt flashlight application. I bought the protected type for safer charging and discharging. The problem I have encountered is they only work when I flip the switch a few times. I seems to never light on the first time. I'm wondering if the PCB is not liking the instant power draw and is stopping it from powering the bulb. When I connect a volt meter it will always show voltage. What ideas do you guys have on this?
Thanks,
Steve
Thanks,
Steve