10440 batteries

[mcquinn]

I finally built some mods based on the AAA box mod designs at MadVapes ,I am pretty impressed with how easy they were to build and the amount of hours I am getting on 10440 batteries is pretty impressive.I built two that use one 10440 and two that use two 10440' in parralel for 3.7 volts.I bought four 10440 protected batteries and found one would not take a charge from the get go ,it was replaced with no problems then after a week a second one quit taking a charge.I got curious and cut the shrink wrap off .There is a circut board double sided taped to the negative end of the batttery.It has a negative conducter soldered to the battery and another conducter goes from the circut board to the positive pole of the battery ,you can see the end of this one.The circut board measures the voltage and if it is low it disconnects the negative contact on the battery.When you try to charge it if the voltage is too low it will also not allow the battery to recharge.The problem with mine was the positive connection to the circut board was broken and the circut board could not function to allow the switching mechanism to allow the negative pole of the battery to be engaged.To confirm this I removed the circut board and cleaned up the ends .The batteries took a charge and worked fine but they are not protected any longer.The moral of the story is have plenty of these batteries on hand as it is very likely these connections on the circut board will break,especially if you have a tight fit in your battry holder.Enjoy your vaping and experiment like a mad scientist.