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Old Feb 13, 2007, 03:39 PM
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What's the best rate to charge lipos at?

I just received my DN charger and it has adjustable charging rates. What's the best rate to use, and is there a rate I don't want to use? Thanks.
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Old Feb 13, 2007, 03:42 PM
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Challenger 413's Avatar
Dickinson, Tx.
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I am not trying to be rude, but if the instructions are un-readable, read some of the sticky posts above at top of page. Knowledge is everything with these types of batteries. Be careful.....

Challenger413
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Old Feb 13, 2007, 03:57 PM
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The best rate is C or below. The rate you don't want to use is more than C. If you don't know what C means you need to find out in a hurry.

Steve
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Old Feb 13, 2007, 04:00 PM
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I charge mine at .5C and I never have to balance. If you want some really good info on lipos, check out this page http://www.bladebusters.com/batteryguide.html
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Old Feb 13, 2007, 05:59 PM
I havent decided yet
Indiana
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2100mah = charge rate of 2.1 amps. 1300mah = charge rate of 1.3amps. slower is "better" and faster is not good
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Old Feb 13, 2007, 09:10 PM
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Here is a link to some good nuggets regarding general lipo usage, including charge rate.

Lipo Nuggets

I hope that helps.
J
Commonsenserc.com
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Old Feb 13, 2007, 09:31 PM
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RTM

mw
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Old Feb 14, 2007, 12:14 PM
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So since my battery packs are 1320 mah, that means I should keep the charge rate at or below 1.3 amps?
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Old Feb 14, 2007, 12:50 PM
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Correct.

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Old Feb 14, 2007, 01:23 PM
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.6-.7 amps would be even better. Your packs will last much longer.
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Old Feb 14, 2007, 02:38 PM
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Quote:
Originally Posted by Motions
.6-.7 amps would be even better. Your packs will last much longer.
How long will it take to charge a pack at this rate? Also, I need to know if I understand how this DN charger works. It will charge 4 batteries at the same time, but can they all be 3 cell packs?
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Old Feb 14, 2007, 03:18 PM
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It can charge 4 cells at one time not 4 batteries. It can charge two 2 cell batteries, a 1 cell and a 3 cell etc.

If you charge a 3S 1320 at 1200 mA it will take approx. 90 to 100 minutes. If you charge at 600 mA it will take approx. twice as long. There is really no reason not to charge your 1320 at 1200 (1.2A) or even 1400 (1.4A) as this is a multi channel balancing charger.
In years past I also believed that charging at less than 1C would help LiPolys to last longer. Now that 10C and greater LiPolys are common I now longer have such beliefs. I routinely charge at 1C plus however 1C is the recommended max. of most LiPoly vendors.

http://www.rcgroups.com/forums/showthread.php?t=535274

Charles
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Old Feb 14, 2007, 03:33 PM
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I charge multiple batteries at once at C which leaves the cells perfectly balanced. I don't have a need to quick charge and rather have all packs done at once rather than swapping every hour.

It comes down to preference and experience.
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Old Feb 14, 2007, 03:40 PM
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Florida
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A very good tutorial on batterys can be found at www.batteryuniversity.com/partone.htm
This is quite lengthy and thourough but well indexed so you can choose the sections you are interested in. An extreemly good source for reliable information from the CEO of Cadex Electonics Ind.
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Old Feb 14, 2007, 03:47 PM
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I was going tpo jump in here and chastise grampi for not reading the DN Power manual. That is until I read it. Wow!

For example, this extract:

"6. The charger can charge for four batteries at one time at best. If it charges for more
than four batteries at one time, it will most probably damage the charging
batteries. Therefore, when a pile of three batteries and a pile of two batteries are
charged at one time, some battery of one pile must be parallel-connected with
some battery of the other. If the voltages of the two batteries are six to one, the
charging batteries may be damaged. This kind of implementation is not
recommended."

And other statements are even more confusing.

"4. if the charger clews it is charging in series-wound form and alarms when it is
charging in parallel connection form, there maybe two reasons:"

Bill
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