Safe to use 2 3s cell batterie?

[rc heli 55]

I would like to know if I could use 2 3s cell bat?11.1 volts 3300mah
22C - (72 amps) continuousBurst C Rate 50C - (165 amps) under 10 secondsIdeal C Rate 18C - (61 amps)
would this damage my ECU on my 600E and will I get more flying time on them? Hope to keep the cost down.



Joe Rudy

God Likes To Fly Heli's Too.

[Coolice]

Hey,

To be honest with you I wouldn't even bother trying them on the 600E as the Mah is too low to give reasonable duration.
On my Swift16 I have a test Kokam 3200 6s pack and while it lasts for 3 minutes of pure fun isn't really enough and I only swing 550mm main blades not 600mm.

You only option is to save up for a while and buy a decent sized pack to use.
.

[kgfly]

I presume you are asking about connecting them in series to make what is effectively a 6s1p 3300 18C pack. If so, then in terms of the stock Align 600L/XL motors and 75A ESC that would be fine, they are rated for 6S operation.

In terms of theory, then combining two identical 3s packs to form a 6s pack is quite OK.

However, in this case, as Ian says, don't risk it. The low rating on these packs will not only make for very short flights, but the cells will be highly stressed and unlikely to last long. You might get 10 cycles but probably not 50. Even the FP 6s 4900 20C packs are challenged flying a T600.

Now if you have lots of these packs and want to use three to make a 9s 3300mAh setup you certainly could and that would be a viable battery for a T600. However the stock ESC and motor are not rated for 9S operation so you would need to replace them with othes of an appropriate rating.

[rc heli 55]

Thanks Guy That what I wanted to know if could put the batteries in series. but would 2 bat 3300 mah be 6600mah or they just stay the same.
Thank You for the Info.



Joe Rudy

[cholyoake]

if there in series, then the voltage is added NOT the capacity, so like kgfly said, they will be 3300mah.

[kgfly]

Quite right:

2 x batteries in series = 2 x voltage, 1 x capacity, same C rating
2 x batteries in parallel = 1 x voltage, 2 x capacity, same C rating

[rc heli 55]

Ok now I understand what you mean. It's hard for me to read it and know what it saying. But I do understand the way kgfly put it.
Thank you


Joe Rudy