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Old 12-20-2014, 07:00 AM
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Join Date: Apr 2008
Location: Wisconsin, USA
Posts: 8,952

Originally Posted by ko4nrbs View Post
Having been given a new but older CellPro 4S 3 amp charger I now need to figure out how to use it to charge individual 18650 cells instead of packs.

I am using 18650 batteries as external power sources for my Trail Cameras that use internal Li-Ion batteries as their primary power source. The 18650 external power configuration is four parallel connected unprotected cells in Protected battery holders. It works very well and greatly extends my cameras time between battery change outs.

Three questions:

I am new to Hobby Chargers and was wondering how I would wire up the holder and charger to charge the individual cells in a parallel connected holder? My initial plan was to use an unprotected 18650 cell holder that connects the cells in parallel and connect the holder to the charger. I didn't see any diagrams for this in the manual.

Could I charge the individual cells in series if using a MACPB7 Node connector pigtail assembly? This would require using individual battery holders so I could easily connect the positive, negative and 3 Node wires.

I have a new Multi4 coming as well so I assume it and the 4S would be wire up identically?

Thank you,
Bill Smith
NE Oklahoma

If you have individual cells, it's much easier to charge them all in parallel. Placing them in series requires that you also wire up a balancer cable. Your charger is set up for that, but the balancer cable is a lot more work. I do have wiring diagrams for balancing cables if desired.

What voltage and milliampere rating do your LiIon cells have? Are they 4.2 Volts at full charge? Just curious.

What kind of battery holder would you be using for the charging purpose? All of them can be charged in parallel at a total charge rate of an ampere or so.
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