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Old 10-31-2011, 03:54 PM   #2
Howard Matos
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Originally Posted by matthewcornell View Post
Hi Everyone. I've seen a number of threads on this, but I'm still confused and I'm hoping you can give me some advice. I want to charge multiple mCP x helicopter batteries (200mAh 1S 3.7V 25C LiPos) at the same time in my Cellpro 4s Gold Charger ( ), which I bought with the "CP-GP/KO" battery connector adapter ( ). The Cellpro tech guy says the charger requires at least 350ma to perform a full charge, and that I'd have to parallel charge enough cells together to reach the 350ma. Isn't there a cable I can buy that would hook three or four together in parallel, with a connector that matches one of those on my CP-GP/KO? I found this one, but it doesn't give specs for its connectors or how it's wired: EA-057-B Charging Cable ( ). To further muddy the water, the Cellpro tech says the cable to connect my cells in parallel would go to their CPBP7 pigtail, and would not connect through the GP/KO adapter. I don't understand why. Last two questions, a) how many could I charge at once (I've seen links to cables that connect six batteries), and b) what rate should I charge at (the Cellpro is automatic, I think). Any help would be great!

When you are talking about charging a single cell, for the 4S Gold, is the 2 outside wires, the red and black. The reason I suggested for you to use the CPBP7 pigtail is there is not a 1S spot on the adapter you purchased (CP-GP/KO). Also, I do not know the availability of a JST XH 1S parallel adapter and then, how would you connect it to the CP-GP/KO without making a modification to the connector because there is not a 1S position. The CPBP7 in my option is the easiest way to rig up a parallel adapter for charging a single cell.

There is no limit to the amount of cells you can parallel charge except that the charger has a maximum output and it would take longer to charge the more cells you add to charge.

You can use one of the auto charge rates or compute a manual charge rate. To do this, total the capacity of all cells you plan on charging. Then multiple by 1,2, or 3 for a 1C, 2C, or 3C charge rate. Example:
You have 3 of your 200 ma cells connected to charge.
3 x 200 ma = 600 ma total capacity
600 ma x 2C = 1200 ma or 1.2 amps.
This creates a 2C charge rate for 3 - 200 ma cells.

Let me know if you have any questions, thanks.

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