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View Full Version : BC6-10 will do......


Hulley
07-22-2008, 05:31 PM
I'm new electric helis and I'm gonna need a good charger. I dont quite get the rule of 200w/6s 10amp=blah!!!.
Will the BC6-10 charge a 6s 5000mah battery at 1C or better?
And can someone explain the math on the volts/watts=amp charge rate thing!
I'm planning on buying a logo500 3d and I need a charger that can charge the batteries in an hour or less (providing the batteries can handle it of course), 6s 5000mah.
thanks :)

BruceW
07-22-2008, 09:12 PM
I use the BC6-10 to charge my FP EVOlite 6S 5350mAh for my Logo 5003D at 6.2->7A which only takes about 40->45 minutes to charge.

Power(Watts) = V*I
I = Watts/V

If the max is 200W and your charging a 6S with a nominal voltage of 22.2 (3.7V/cell), your effective charge current can go to 9A. The only problem is that 22.2 is nominal voltage and the pack actually goes to 25.2 but I'm not sure the charge current is actually maxed out when its that close to the end of cycle. If so then you effectively get around 8A when you get close to 25.2V. The other problem is that there is extra power needed when up converting the voltage from a 12V source to get 25V to the battery and this costs some power as well but I'm not sure if this is factored into the the total power available to charge the battery. Charging a 3S battery is probably the most efficient since there is minimal conversion of the input voltage to the output.

Either way, this charger seems to handle charging large packs just fine. The key is to get a good power supply that can handle the current demand without dropping in voltage. I'm using a 650W power supply from a computer as my source.

RC Accessory
07-22-2008, 09:34 PM
I'm new electric helis and I'm gonna need a good charger. I dont quite get the rule of 200w/6s 10amp=blah!!!.
Will the BC6-10 charge a 6s 5000mah battery at 1C or better?
And can someone explain the math on the volts/watts=amp charge rate thing!
I'm planning on buying a logo500 3d and I need a charger that can charge the batteries in an hour or less (providing the batteries can handle it of course), 6s 5000mah.
thanks :)

volts x amps = watts

A 6S pack is 22.2V. 1C on a 5000 mah pack is 5 amps.

22.2V x 5 amps = 111 watts

So yes, the BC-6-10 will charge your 6S 5000 pack at 1C.

The chargers 200 watts is to the battery, as long as the power source can supply enough amps that the charger will draw.

This is quite important to know and understand when buying a charger.

Hulley
07-23-2008, 06:10 AM
Thanks guys! You've been a great help. Evan, I'll order the BC6-10 this week and Bruce, looks like I'll be koining the Logo crowd as well! :banana

Hulley
07-25-2008, 06:29 AM
I'll have my BC6-10 on monday! Thanks Evan for for the quick ship and reply to my question. I downloaded Bobs vids and look forward to using this charger. :thumbup:

BruceW
07-25-2008, 10:35 AM
Good deal! Its a nice charger and I think you'll like it. See you on the Mikado forum.

Bruce