On the advice of Bolster in another thread, I purchased a Sipik SR68 flashlight off of Ebay for $10 S&H included. I just received it today and popped in an Alkaline battery from CVS. I don't have anyway to measure lumens...but WOW! That sucker is bright! I think the Ebay ad said something like 160 lumens though I don't know if this is with a standard alkaline AA. I've also seen talk about a 14500 battery but don't know anything about them. Are 14500 rechargeable or one-use? Are they better? I see they are something like 3.7V as opposed to 1.5 for alkaline or 1.2 for rechargeables. Is there any benefit to a 14500? Is there any downside to them? Looking forward to taking it out tonight after dark to see what it can do. So far I'm impressed. So much so that I ordered another one off of Ebay for $8 S&H included. This one says it is 250 lumens. Again, don't know if that is on a regular alkaline AA or not though. But I like to be as redundant as possible in some areas and flashlights is one of them. Particularly in the area of emergency preparedness and primitive camping. Info on 14500 batteries is appreciated, or any other batteries as well. My experience right now is limited to NiMH/Nicad rechargeable and alkaline. Thanks.