Is there a way to tell if an 18650 actually has the protection circuit installed? Most of my cells from KD and DX that claim to be protected have an indentation near the positive side of the battery. Some do not, and sizes vary between manufacturers. I purchased five on Ebay and one is much larger than the rest, all are supposedly the same type.
Removing the label would be a sure way to tell but will possibly damage the battery and not be productive (yep, it was protected but i can't use it now )
I plan on purchasing some very high current flashlights in the near future, just want to be safe.