Packhorse
Flashlight Enthusiast
I have some Trustfire 18650s that I have removed the protection boards to I can make a 7.4v pack. Is there any reason I cant take 2 of these boards and series them up to make a 7.4 v protection circuit?
If so how?
1. P- of 1st PCB to negative output/charge
2. B- of 1st PCB to negative of battery pack
3. P+/B+ (these are common on the PCB) of 1st PCB to P- (or is it B-) of 2nd PCB??? And also common tab for balance charging
4. P+/B+ of 2nd PCB to positive output/charge and + of battery pack
I am fairly confident 1,2 and 4 are correct. But what about #3?
If so how?
1. P- of 1st PCB to negative output/charge
2. B- of 1st PCB to negative of battery pack
3. P+/B+ (these are common on the PCB) of 1st PCB to P- (or is it B-) of 2nd PCB??? And also common tab for balance charging
4. P+/B+ of 2nd PCB to positive output/charge and + of battery pack
I am fairly confident 1,2 and 4 are correct. But what about #3?
