Understanding Batteries 101

problems with fully charged batter

Thanks for that helpful info! I have a problem with a fully charged 2200 3cell battery I am using with the c pack set up. After taking the battery off of the balance charger and hooking everything up I am only getting limited power - not close enough to get the plane in the air - based on the info you shared can you share some opinions/knowledge of what is wrong? The battery is not new, but not that old either - probably charged only 4 times
Thanks!
Dennis
 

Maxstudio

New member
battery question from Noob

OK.......

I have a 3 cell 850 mah Hyperion battery, new...or well flew with it once. pretty sure i recharged it after first flight and had some build setbacks (bought a new Harley Davidson, LOL) anyway it sat a month....went to fly, no juice....set it to charge on my B6AC Pro charger, but it won't charge, ran a battery test on it, says Low Voltage! Does this mean my new battery is done already?
 

jtuttle11

Junior Member
Great info, I try to follow all of these procedures, but seem to come up a little short frequently. Will a proper storage charge prevent ballooning or puffing of the packs? And, is there 'Anything' that can be done to recover a pack once it has puffed?(Probably Not) In which case I have a lot of batteries to dispose.
 

Hai-Lee

Old and Bold RC PILOT
Great info, I try to follow all of these procedures, but seem to come up a little short frequently. Will a proper storage charge prevent ballooning or puffing of the packs? And, is there 'Anything' that can be done to recover a pack once it has puffed?(Probably Not) In which case I have a lot of batteries to dispose.
The "Puffing" of battery packs is a result of gassing due to overheating.
Temperature management is a must to extend battery life.
Never charge or store batteries in a hot or very warm place.
To allow your batteries to have a long life try to keep the flight temperatures down by using good ventilation in the plane, keep the battery away from the ESC and allow the battery to cool before placing in your battery bag or box.
Never allow your battery to get too cold as this can reduce life due to non-uniform heating and. one cell overheating whilst the outer 2 cells remain at reasonable temperature.
Never charge a very warm or hot battery
Never over discharge a cell as this increases the cell's internal resistance as does overheating a cell. The internal resistance is the primary cause of the heat batteries generate in use and whilst being charged.

As for my own batteries, I have batteries that I still use that are well over 2 years old!
I follow all of my own rules as well as those listed in this thread with a minor exemption/addition.
My batteries are chilled to 4 degrees Celsius before charging, (which is always a balance charge at 1C or less).
As I fly a fair bit I do not worry about storage charge but rather store my batteries at 4 degrees Celsius after charging.
The use or refrigeration has reduced the "puffing" of my batteries to a very very slow process. Also the refrigeration lessens the internal gas pressure prior to charging or flight.

As the internal resistance of a battery pack increases I try to earmark them for a lower discharge plane if possible and buy a new battery for the high discharge usage. My last battery order was placed over a year ago now.

The climate here is blistering and so my temperature regime may not suit everyone but the management of the battery temperatures will definitely extend their life considerably.

What works for me!
Have fun!
 

Matthewdupreez

Legendary member
@SquirrelTail @The Hangar @JasonK @Monte.C would i be right in thinking that if this battery drops down from 12.26v to 9.89v when under load of a PPF.(approx 15amps)
then it is a dead or very weak battery.
IMG_0863.JPG
 

JasonK

Participation Award Recipient
@SquirrelTail @The Hangar @JasonK @Monte.C would i be right in thinking that if this battery drops down from 12.26v to 9.89v when under load of a PPF.(approx 15amps)
then it is a dead or very weak battery.
View attachment 202020
Does it bounce back when you remove the load? If so, you have a really high internal resistance, which means it might still be useful for a low draw load, but find it near/past EOL for most use cases. I don't know if there is any way to revitalize it. I haven't got big into batteries just yet.
 

Matthewdupreez

Legendary member
Does it bounce back when you remove the load? If so, you have a really high internal resistance, which means it might still be useful for a low draw load, but find it near/past EOL for most use cases. I don't know if there is any way to revitalize it. I haven't got big into batteries just yet.
ok cool thanks
 

Matthewdupreez

Legendary member
Does it bounce back when you remove the load? If so, you have a really high internal resistance, which means it might still be useful for a low draw load, but find it near/past EOL for most use cases. I don't know if there is any way to revitalize it. I haven't got big into batteries just yet.
it is like around 7 years old..... so i probably should replace it
 

Matthewdupreez

Legendary member
if you cycled it 1x a week over 7 years it would have gone through 52*7 -> 364 cycles. there is just general aging effect to the durability of the battery.
hehehe it's been in storage for 7 years was my cousins but then he moved to holland, and left it with his parents, then they moved to holland and gave them to me
 

boogieloo

Active member
Thank you. Very good information I needed. 2S 1p 650 mAmp/hours 7.4 volts. 2 series and 1 parallel. The batteries are connected this way. Very nice to know. That is the battery I have. But I was wondering if the radio RF misfired on the receiver. xt 30 connector on a Pack C edition engine. Twin.

Mines is Flysky transmitter. I don't think Flysky is dumb. They're top gun engineers and I vouch for Flysky because the company is world wide and heard of and smart. But Just curious too about how they fire the ESC engines upon contact. So that's the part I'm at now. Good information to know and thanks.

Thank you again. I had a A in my college Algebra class. I needed that class for some requirement. It covers volts and amps and resistance.
 
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Quinnyperks

Legendary member
Thank you. Very good information I needed. 2S 1p 650 mAmp/hours 7.4 volts. 2 series and 1 parallel. The batteries are connected this way. Very nice to know. That is the battery I have. But I was wondering if the radio RF misfired on the receiver. xt 30 connector on a Pack C edition engine. Twin.

Mines is Flysky transmitter. I don't think Flysky is dumb. They're top gun engineers and I vouch for Flysky because the company is world wide and heard of and smart. But Just curious too about how they fire the ESC engines upon contact. So that's the part I'm at now. Good information to know and thanks.

Thank you again. I had a A in my college Algebra class. I needed that class for some requirement. It covers volts and amps and resistance.
you're going to need a bigger battery I think.