Lipos and Balance Charger

[dam74]

Well I'm new to these fandangled balance chargers and have a question to ask in regards to parameters to use. I'm using the Sigma II EQ charger as recommended by a few of the members here as it only cost £60 and has a built in psu so can run off mains without having to lug around a PSU (for meets we should look at running one big PSU , bags not being the guy bringing it though).

Anyway on to the point, I'm running at the moment a Blade400 and Trex450 Sport so using 11.1V 3S batteries around the 2100mAh mark. I've set the voltage to 11.1V and number of cells to 3S. For the current setting would I'm taking I should input 2.1A (2100mA). Is this correct?

[Smoothound]

Yep

[dam74]

Phil, short and sweet and to the point

[dam74]

I have an Align battery that is 2150mAh would you set it to 2.1A or 2.2A as the increments only go in .1 of an amp.

[robgt]

Neither will hurt it, 2.2 will go marginally faster.

Cheers,
Rob

[dam74]

Cheers Rob, my align lipo just charged in about 22min said discharge capacity 704/705?

[robgt]

said discharge capacity 704/705?

I guess that's the mAh the charger put back into the pack?
It would stack up with the time it took to charge the pack, so maybe?
Usually, a full charge at 1C will take 1 hour.
Cheers,
Rob

[dam74]

I guess that's the mAh the charger put back into the pack?
It would stack up with the time it took to charge the pack, so maybe?
Usually, a full charge at 1C will take 1 hour.
Cheers,
Rob

I guess for storage the batteries have partial charge. Oh and what is this info that came with the Align Lipo about normally you charge at 1C so 2150/1C or 1000 = 2.15A. They then go on to say that Align recommends charging at 0.5C so 2150/0.5C or 500 = 4.3A??? Is that correct, does anybody actually do that or do they just charge at 1C?

[Guest]

I have two 2500 and one 2100 and the guy i bought mine off said charge the 2500 at 5amp and the 2100 at 4.2 amp

[t43er]

I have two 2500 and one 2100 and the guy i bought mine off said charge the 2500 at 5amp and the 2100 at 4.2 amp

That's 2c! You might want to verify the lipo brand having said that, Today's lipo tech is so advance, thus it should be fine!

[dam74]

t43er, you sure as i thought 0.5C = 500, 1C = 1000, 2C = 2000. So 2500/500 = 5A, and 2100/500 = 4.2A. I'm most likely wrong though.

[Magic919]

t43er, you sure as i thought 0.5C = 500, 1C = 1000, 2C = 2000. So 2500/500 = 5A, and 2100/500 = 4.2A. I'm most likely wrong though.

No, it depends on the value of C where C is the capacity of the battery in question in mAh.

[Boggy]

1c=1/1000th not 1000 so to charge a 2200mah it would be 2.2A

[Magic919]

1c=1/1000th not 1000 so to charge a 2200mah it would be 2.2A

Not at all. 1C = 1 x the capacity of the battery whatever it may be. 2200mAh = 2.2A however.

[Boggy]

oi im legendary with my understanding of electrics!!!! so you may well be right,infact you probably are
thats how i work it out capacity of the battery divide by 1/1000