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› Trying to learn Lypos, notice some puffing and how to charge a good balanced battery?
05-27-2013 10:34 PM  4 years agoPost 1
Rockstarair

rrNovice

Riverside,ca.us

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New with lipos
I have charge my new ROC 30c about 10 flights each.
Charger is a celectra [eflite] 80w with balancer
I've been reading some advice on here and they say the readings on each cell should be the same.
The reason I am looking into to this now is because I've notice some puffing on each pack. Is puffing normal afte 10 flights?
I only do sport flying not hard 3D
And I alway have a least 35% left after flying. Only took it down to 23% one time to find out how long my flight time is.

Love to fly

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05-27-2013 10:43 PM  4 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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Your cells look fairly equal. Did you break your pack in with a few short flights at first? Which flight did you take it down to 23%? If it was one of the first flights, It may be a reason for puffing.

I like to break them in with short flights and 1C balance charge.

Bill Whittaker

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05-27-2013 10:51 PM  4 years agoPost 3
Rockstarair

rrNovice

Riverside,ca.us

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Last flight it was down to 23%
I only hovered around for 3min. the first 2 flights iach pack, then 2 4min. forward flight .
Head speed was only set at 90% then
Now its upto 100% the last few flights.
The puffing is not bad yet the the packs are not nice and square like when new

Love to fly

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05-27-2013 11:03 PM  4 years agoPost 4
moparherb

rrApprentice

Fulton, NY Syracuse Thunderbirds

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If you only hovered for 3 min and the battery was down to 23% left something else is wrong. To big a motor, to small a battery, not fully charged or something. To get a battery to only 23% left in three minutes you would have to be beating the heck out of it. Or this is the wrong size battery for your heli. What heli are you flying and give us the specs on the battery.

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05-27-2013 11:59 PM  4 years agoPost 5
Rockstarair

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Riverside,ca.us

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My bad.
I I took it down to 23% on the 8th. flight. It was about a 6min. flight all together.
The batteries always had 45% or more on first 5 flights
The motor is stock align from the 550 kit.

Love to fly

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05-28-2013 04:30 AM  4 years agoPost 6
pctomlin

rrVeteran

Texas

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Puffing after 10 flights would not be normal. Are you using the cell checker to tell you how much is remaining in the battery after the flight? If so, bad mistake. You can actually be overflying the batteries, these cell checkers are a very poor indication of remaining capacity. The best way to determine remaining flight MAH in a battery is by how many MAH you put back in with your charger. I time my flights so I am consistently at 25% remaining in the battery calculated from MAH put back in during recharge.

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05-28-2013 04:43 AM  4 years agoPost 7
Rockstarair

rrNovice

Riverside,ca.us

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Yes I was told to use this [the pic I took] to make sure I don't go below 20%.
I'm glad I have not invested in hi end batteries.

Love to fly

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05-28-2013 04:56 AM  4 years agoPost 8
pctomlin

rrVeteran

Texas

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The reason these cell checkers are not a good indication of remaining capacity left in the battery is because of the flat voltage from initial drop until the battery reaches the end of its curve where the voltage falls off sharply. The best indication of remaining battery capacity after flight is MAH put back in.
Also, when done flying, always store your batteries at storage voltage (about 3.82V to 3.85V per cell). Leaving a lipo fully charged for discharged is not good for it either.

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05-28-2013 05:02 AM  4 years agoPost 9
Rockstarair

rrNovice

Riverside,ca.us

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Very nice. I will be doing research on this. Looking forward to knowing the most I can on charging these batteries. Thanks for all replies.

Love to fly

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05-28-2013 05:04 AM  4 years agoPost 10
Rockstarair

rrNovice

Riverside,ca.us

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Last thing I know my charger says its charging at 3.5 amps. I have it set at 4 amps.

Love to fly

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05-28-2013 12:40 PM  4 years agoPost 11
moparherb

rrApprentice

Fulton, NY Syracuse Thunderbirds

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Hey Rockstarair, what heli are you flying and also which ROC battery are you using (mah)?

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05-28-2013 04:25 PM  4 years agoPost 12
Rockstarair

rrNovice

Riverside,ca.us

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Trex 550
5000 6s

Love to fly

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05-30-2013 01:02 AM  4 years agoPost 13
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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Last thing I know my charger says its charging at 3.5 amps. I have it set at 4 amps.
That is probably all your charger can handle.


Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!

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05-30-2013 05:07 AM  4 years agoPost 14
Rockstarair

rrNovice

Riverside,ca.us

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I will be going to a Venom charger this week will that be a good charger? I like how it plugs into the wall.

Love to fly

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05-30-2013 07:35 AM  4 years agoPost 15
HeliMan Dave

rrVeteran

Suburban Chicago

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FWIW, I've heard bad stories about Venom chargers.

Can't remember exact details but I'd recommend avoiding them.

Logo 700 / 600 / 500 V-Bar NEO / Blade 180CFX / mCPX BL / Nano / V-Control

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› Trying to learn Lypos, notice some puffing and how to charge a good balanced battery?
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