if the battery holders have height restrictions, you may have an issue with the protected 18650s fitting them. I had an application that used 3 18650s...

yupperz... Ive mangled several double and triple battery holders to become a single cell unit. 😀

I took a look at the Ebay info, they dont offer the info required. What you want to look for is amperage drawn or watts used when operating. and... n...

looks like your ballast resistor for the IR transmitter is too high, try dropping it down to 100 ohms. what kind of voltage supply are you using? and,...

@codecage hmmm, not good to see that even vape shops are being that way. As far as the battery being longer due to the "circuit board", its a battery ...

battery costs from vape shops are a bit higher than elsewhere. but then again you will be getting a set of batteries that were made for hi amp usage. ...

flat tops have the wide contact surface, pretty much as wide as the whole top of the battery within the insulated area, button tops have a protrudance...

I believe the chips are power balancing units to keep the current "equal" between cells when charging is taking place.

looking for decent to hi quality 18650s?? find a Vape Shop, seriously, a Vape shop sells top quality batteries. Ive got some 18650s ( Sonys) that hav...