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Electric General Discussion
› Charging 2 Pulse 5000 mAh 35c Batteries
09-22-2016 12:27 PM  10 months agoPost 1
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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2 Pulse 5000 mAh 35c Batteries, charging using a balance board.

What Amperage setting should I use.

I am just making sure so I don't use a setting that's too high.

Dennis

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09-22-2016 01:08 PM  10 months agoPost 2
LaDon

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Fort Dodge .Ia

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10 amps would be 1c. You can go 20 amps no problem on that if you would like. That is if you are parrallel charging them. If single 5 amps is 1c and 10amps would be 2c. Those won't hurt anything either

Team Jr

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09-22-2016 02:06 PM  10 months agoPost 3
DemetriusUSN

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Virginia Beach, Va USA

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Just a word of advice.... My packs never get charged above 2c or 2 times the mah of the pack. Some manufactures say that you can charge at 5c but you shorten the life span of that pack drastically. Just my 2 cents....but LaDon is correct...

Minicopter Diabolo 700, TDR Rigid, Goblin Speed 700, Compass 6hvu, Logo 600se V2, Devil 380

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09-25-2016 03:38 AM  10 months agoPost 4
flyride

Key Veteran

Salt Lake City UT

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I charge my 2 6s 5000 in parrellel at 3c charge rate ( 30A) and have done so for a few years now and have never had an issue with the pulse batteries. They are rated at 5c charge rate.

and the blonde said "RECTUM, Hell damn near killed em!!"

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09-25-2016 09:12 AM  10 months agoPost 5
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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Thanks, this is the information I was looking for.

Dennis

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09-28-2016 11:11 PM  10 months agoPost 6
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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OK, to make sure I don't damage anything or burn up anything, I want to be sure I am figuring this correctly.

I have the following specs on a Pulse Battery:

Specifications:

Cell Count: 6S
Capacity: 5000mah
Discharge Rate: 45C
Charge Rate: 5C

The Charge Rate is 5C

I am going by the calculators online and come up with an Amp setting. I don't want to reveal this number.

I would like to see what your answer is.

Thanks, Dennis

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09-28-2016 11:29 PM  10 months agoPost 7
Ace Dude

rrProfessor

USA

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Charge Rate: 5C
That's the max charge specified by the manufacturer.

  

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09-29-2016 06:56 AM  10 months agoPost 8
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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Ace, Correct,

I need this number converted to actual amps the battery can be charged.

EXAMPLE: 5amp's, 10amp's, 15amp's, etc., . . . .

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09-29-2016 08:26 AM  10 months agoPost 9
Chance

Heliman

Melbourne, Australia

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For 5000mAH battery (aka 5AH), 1C is 5 Amps. Don't charge at max rated unless you absolutely need it in 10 minutes or so, it will shorten the battery life. I use and recommend 2C charge which will fully charge a battery from ~20% in 20-25 minutes.
So charge it at 10 Amps, or 20 amps if parallel charging 2 batteries.

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09-29-2016 09:06 AM  10 months agoPost 10
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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Chance, you posted exactly what I am looking for, Thanks.

I have read & read, what exactly does "C" stand for?

Example: 1C = 5 amps . . . the C is ?

Dennis

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09-29-2016 09:33 AM  10 months agoPost 11
Chance

Heliman

Melbourne, Australia

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I think C stands for charge. 1C is the rate to charge a battery from dead flat to full in 1 hour. Theoretically of course - you'd be crazy to run down batteries to dead flat, they would die very quickly.

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09-29-2016 12:12 PM  10 months agoPost 12
Ace Dude

rrProfessor

USA

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C is the capacity of the pack. In this example:

C=5,000mAh and 5,000mAh = 5Ah.

5C = 5 x C.
5 x 5,000mAh = 25,000mAh.

Thus, the max charge rate is 25,000mAh (25Ah).

In practice you'll find most users would typically charge this pack between 1C-3C which is 5A-15A.

  

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09-29-2016 01:48 PM  10 months agoPost 13
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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Thanks Again,

Pulse states their batteries can be charged at 5C, which is 25 amp's.

You recommend charging no more than 15 amp's to be on the safe side and your batteries should last longer?

I am setting up my Duo 406 and I am getting my fact straight to be on the safe side.

I appreciate your understanding, patience, and most of all your knowledge.

Thanks,
Dennis

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09-29-2016 02:08 PM  10 months agoPost 14
Ace Dude

rrProfessor

USA

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There are differing opinions (and no evidence that I have seen) that high charge rates reduce service life.

On a new pack I'll do the first 5-10 charges at 1C. After that I charge at 3C nearly all the time.

  

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09-29-2016 06:09 PM  10 months agoPost 15
philip 01

Elite Veteran

ft worth

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You can go 3c without any problems. Been doing it for years.

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09-30-2016 05:54 AM  10 months agoPost 16
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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What is the lowest voltage you allow your batteries to discharge.

I normally don't let mine go below 3.80v , usual charge reading is 4.19v to 4.20v .

This give me about 6 to 7 minutes run time on my 600 44.4v heli using 5,000mAh pulse batteries.

I am not going any further, I would like to hear your thoughts/comments.

Dennis

PS: Batteries are expensive, I am trying to get the max life out of mine, FYI. I appreciate the feedback.

By the way, I tested out my new Duo 406 , that is one bad a** charging system. I am using a 1300w power supply. I am glad I spent the extra $$$$$ on the Duo. I was charging 2 5,000mAh batteries, balance charge, 1 charging board, it took less than 20 minutes and was only using 1/2 of the available watts, and this was during the first 5 minutes of the charge. Charge rate was 2C.

I can't imagine how quick it would be if I went the full 5C charge rate that Pulse advertises.

What amp setting do you use when parallel charging two 22.2v 5,000mAh batteries? 2 time 5,000mAh = 10,000mAh's. I am sure you realize why I am asking!

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09-30-2016 11:48 AM  10 months agoPost 17
philip 01

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ft worth

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I use about 3.8 for store charge. Minimum voltage is 3.71.

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09-30-2016 03:36 PM  10 months agoPost 18
DennisH

Senior Heliman

Baton Rouge Louisiana USA

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I should have clarified my post a little better.

When flying, when do you stop flying? Another words, I won't let the heli drain the batteries, I usually stop around 6 to 7 minutes and the individual voltage readings are somewhere around 3.80v's.

I find if you let the batteries discharge while flying go below 3.80v's, the batteries life are greatly shortened. Your stating you "don't" let your batteries go below 3.71v's, correct ever?

Just seeing if this is the case with everyone. Again, I am looking for MAX battery life.

Dennis

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09-30-2016 07:25 PM  10 months agoPost 19
philip 01

Elite Veteran

ft worth

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I fly to 20% capacity which is usually around 3.71.

The flight time will depend on a variety of factors.

On new packs I'll start around 3 minutes and go gradually from there til I find 20%.

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09-30-2016 07:53 PM  10 months agoPost 20
LaDon

Veteran

Fort Dodge .Ia

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Phillip gave good advise there. 20% of the pack left. So if you have a 5000 pack I will want to put approx 3800 to 4000 mah back in the pack and then you should be ok. I feel mah is a better more accurate way of doing it. My opinion of course. But I think going by voltage gives a broader line. It will carry a fairly flat line on the voltage scale where mah is mah period.

Team Jr

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