After my pathetic Ego battery gone, I remember that I still have two Fenix Li-ion rechargeable batteries. It have an over-charge, over-discharge built-in circuit which size is 18650 and capacity is at 2600 mah and 3.7V (I used it in my flashlight). So I wonder if I can use it like the power supply for my e-cigar? It already has a built-in protect circuit so will I need another protect circuit board like my old ego battery had or just put it in battery tray and use it. I really do not want to damage my mouth so help me. Thank you so much. 
PS: I never spent my money for another Ego battery because it is not durable (my damage battery is just one month old) beside I really tired to charge it everyday. I will take an adventure in modding world and try to make some DIY e-cigar, hehehe.
PS: I never spent my money for another Ego battery because it is not durable (my damage battery is just one month old) beside I really tired to charge it everyday. I will take an adventure in modding world and try to make some DIY e-cigar, hehehe
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