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HomeAircraftHelicopterMain Discussion › Pulse 2S 7.4V 5000mah RX Lipo charge rate?
11-14-2014 03:26 AM  3 years agoPost 1
Aaron29

rrProfessor

USA

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Hi,

My new Pulse 2S 7.4V 5000 mah RX receiver style Lipo battery is labeled for 5C charge rate.

Is this for real!? I can't imagine throwing 25 amps at a receiver battery! But then, it's clearly labeled as built for it?

What are all you Pulse Receiver battery guys charging at? I was thinking 3C might be my personal max. This isn't a power pack and it just seems weird.

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11-14-2014 04:28 AM  3 years agoPost 2
EEngineer

rrProfessor

TX

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I couldn't find that battery on their website....

Clicked on "RX" and nothing came up.

Am using Pulse 45C & 65C main batts. on my 700/800XXs...and charge them as one normally would...

My 800XX came with a GensAce 2S LiPo...but it was maybe 10C at most....use it for the Kosmik "buffer" pack....

FWIW

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11-14-2014 04:29 AM  3 years agoPost 3
Aaron29

rrProfessor

USA

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There's no labeled discharge rating. Just a 5C charge rating listed.

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11-14-2014 04:32 AM  3 years agoPost 4
EEngineer

rrProfessor

TX

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Can you post the link, please?

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11-14-2014 04:33 AM  3 years agoPost 5
Aaron29

rrProfessor

USA

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No link. It's on the battery.

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11-14-2014 04:35 AM  3 years agoPost 6
EEngineer

rrProfessor

TX

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Seems like a lot of amps.

I'd just charge it at 1 or 2C...

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11-14-2014 05:54 AM  3 years agoPost 7
Dr.Ben

rrMaster

Richmond, VA, USA

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Regardless of the capability of taking a 5C charge rate, I'm not seeing the need to charge your receiver pack in under 15 minutes. 1-2C is fine.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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11-14-2014 06:22 AM  3 years agoPost 8
EEngineer

rrProfessor

TX

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Better safe than sorry.

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11-14-2014 01:52 PM  3 years agoPost 9
VinceY

rrApprentice

Newnan GA

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I use the Pulse 2s 5000 in several helis and charge at 10 amps

Team Synergy/ Rail Blades

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11-15-2014 01:13 AM  3 years agoPost 10
EEngineer

rrProfessor

TX

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That's good to know.

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11-15-2014 01:24 AM  3 years agoPost 11
unclejane

rrElite Veteran

santa fe, NM, USA

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There's also a point of diminishing returns the higher rate you charge at. The CV phase of the charge takes longer and eventually eats noticeably into the overall time even with the shorter CC phase of the charge.

I've found this on my thunderpower 2s flight packs on my helis to start being noticeable around 3C. I think I charged one at 4C once and I was pretty nervous and never did it again.... But hey... didn't hurt the pack and it didn't even get warm, so it can probably take it fine.

I also find 2C to be quite acceptable, I rarely need to charge faster than that...

LS

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11-15-2014 03:21 AM  3 years agoPost 12
Ace Dude

rrProfessor

USA

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My new Pulse 2S 7.4V 5000 mah RX receiver style Lipo battery is labeled for 5C charge rate.
Max charge rate must also take into consideration the wire and connectors used.

  

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11-15-2014 03:56 AM  3 years agoPost 13
3dgimble

rrKey Veteran

Rochester

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Dont charge it higher than 1C, it can barely handle 1C, so going to 5C will destroy the lipo, even start a fire.
I own various Pulse ultras, RX, TX in all sizes, the most I tried was 1.5C and they all got warm(about 20F above room temp).
I have a 5K 2S Pulse ultra it does not like anything above 1C. So that is as high as i will go with it.

They need to remove that from the decal, it was the same labeling with the Red Pulps!

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