Max amps for charging 3cell bat in parallel

[fizzviic]

Using a programmable charger, what is the max safe amperage for charging multiple standard Phantom batteries in parallel?
Is there a formula for 2, 3, 4 etc 3 cell batteries?

Thanks

 

[mroberts]

If they're the stock batteries, then I wouldn't charge above 1C each unless someone can show where they list a higher rating.

Theoretically, your parallel charging current is just your single battery current times the number of batteries, so 2.2A x n

However, parallel charging relies on all the batteries being at the same state of charge. I think the risk is that if there's a difference in voltage, the lowest one gets charged at a high rate by all the others.

Even if you're confident they're all at the same voltage, +/- 0.1V then, for safety, I'd charge at 2A per battery just to give you some margin.

 

[fizzviic]

Thanks for the info. I will set my charger accordingly. I appreciate it.