Hey everybody!

 Trying to save some money and I am in need of some advise, leads, tips or what-have-you on AA, 9V, D and other rechargeable batteries and where to buy them. Applications vary from guitar amps and pedals that I will be building. Perhaps 3 18650s for 11.1 volts? 12v dry or gell cells... to flashlights and other small electronics. I need to do it as safely as possible, keeping in mind that some of these things like to mimic fireworks. Any help or thoughts would be most appreciated.

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18650 cells are 4.2V at max charge and nominal charge is 3.7V.  dont let them get below 3.2 and in most cases 3.5 is the safe cutoff. 

so 3 cells series will have a max of 12.6V and recharge when the pack drops to 10.5V. This made me think i need to make a pack to drive my micro cube... mmm  got a few lying around if i use 6 in a 3S2P i should get a lot of life out of it between charges.

 Thank you for that Timothy! Good solid info. I appreciate it.

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