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Gliderbill
12-31-2005, 05:50 PM
I have a problem when charging a 3 cell LiPo in that it is rated as a 900mAh but it will only charge up to 612mAh. Would like some answers re.
I'm not an electrical guy so would like some basic "beginners" replies. You know. Something that an 80 year old "wet" power guy can understand! I've already smoked a $40.00 ESC by using too large a fuse! Really dumb!

Twmaster
12-31-2005, 06:07 PM
It's likely that all you have used from the pack is 612mA of power. I wouldn't worry about it.

Mike Parsons
12-31-2005, 06:21 PM
I agree with Mike. It is likely you only used that amount of MAH. Start timing your flights and pushing it another minute or so to see if you put more mah back in.

I have also moved this thread to batteries and chargers.

Cheers,
Mike

Rugar
12-31-2005, 06:39 PM
Its also suggested by the battery experts that your battery may last you a lot longer by not using its full capacity and discharging it all the way down to LVC (low voltage cutoff).

meatball
12-31-2005, 06:48 PM
Yep, I heard same thing, not past 80 percent capacity, and charge at 3/4 C rating, and your pack will last a lot longer.

Rugar
12-31-2005, 07:03 PM
Yep, I heard same thing, not past 80 percent capacity, and charge at 3/4 C rating, and your pack will last a lot longer.
I charge at .75C at home when not in a hurry, and 1C or maybe just slightly below when at the field.

Gliderbill
12-31-2005, 09:07 PM
Thanks to all for your answers!
And I agree about engines and motors! For years I told the wet power flyers that they had an engine in their plane not a motor!

jswigart
01-12-2008, 08:07 PM
Yep, I heard same thing, not past 80 percent capacity, and charge at 3/4 C rating, and your pack will last a lot longer.
What does the C rating of the battery represent? Is it the mah capacity of the battery?

Pinecone
01-13-2008, 02:53 AM
C is the capacity of the pack. So 1C = 1 x Pack Capacity.

Actually charging under 1C doesn't seem to have anything to do with pack life. But keeping the depth of discharge under 80% will increase pack life several fold.