Charging lipo
- Thread starter animau
- Start date
ChrisViperM
Active Member
Why would you charge your LiPo's only 95%....? What you need is a good charger with balancer (not that wall plug type) which has delta peak...the charger would know when your LiPo is full.
Here is something to get you fit on LiPo's:
http://www.rchelicopterfun.com/rc-lipo-batteries.html
http://www.wannarace.co.uk/page_2207335.html
http://en.wikipedia.org/wiki/Lithium-ion_polymer_battery
Chris
Here is something to get you fit on LiPo's:
http://www.rchelicopterfun.com/rc-lipo-batteries.html
http://www.wannarace.co.uk/page_2207335.html
http://en.wikipedia.org/wiki/Lithium-ion_polymer_battery
Chris
If you run your battery to about 3.7v each cell ( unloaded, meaning just sitting on the ground and not hovering) that will delete about 80% of the battery. Then when you charge it, it's full and has put 80% back into the battery.
So if you have a 5,000Mah battery, if you used 80% then the charger should have put 4,000Mah back into the battery.
So if you have a 5,000Mah battery, if you used 80% then the charger should have put 4,000Mah back into the battery.
yeap but you are again on 100%..!
BerndM
Member
Maybe I;m not understanding the question but here is my take on it.
If, for example, you start off with a FULLY charged 1000mah battery and you run it down to wherever you cutoff is set, and then charge it up to only 95%, your recharged battery will now only be charged up to 950mah.
If you recharge THAT to 95%, your recharged battery will then only be 902.5mah etc etc etc.
You see where I'm going with this?? Pretty soon you'll have NOTHING left but a worthless battery.
IMO you HAVE to ALWAYS top off to 100%!!
If, for example, you start off with a FULLY charged 1000mah battery and you run it down to wherever you cutoff is set, and then charge it up to only 95%, your recharged battery will now only be charged up to 950mah.
If you recharge THAT to 95%, your recharged battery will then only be 902.5mah etc etc etc.
You see where I'm going with this?? Pretty soon you'll have NOTHING left but a worthless battery.
IMO you HAVE to ALWAYS top off to 100%!!
ChrisViperM
Active Member
The only thing you really need if you are serious about your LiPo's health is a good LiPo charger with balancer connection. You want to fill as much juice as possible into your LiPo and still garant a long life for your batteries....and that will be taken care of by a good charger. For better understanding, the following I copied from another website:
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Lithium Polymer battery chargers operate using a CC+CV charging profile, this means that the current (Amps or Milli-Amps) set will apply to the charge cycle during an initial "Constant Current" mode until the voltage of the pack reaches around 4.0V per cell. After this the charger will change mode to Constant Voltage charging and will terminate when the pack is drawing only a very small amount of current.
Charge Rate: The LiPo should normally be charged at 1C during the Constant Current phase of charging (the charge current setting on the charger). This means that an LiPo 1800 mAh pack should normally be charged at 1.8 Amps (or 1800 Milli Amps). This will result in a pack that is 90% full in around 1 hour....so "absolutely" full will take a bit longer...
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Follow these instructions together with a GOOD charger, and your LiPos will thank you with good performance and a long life.
Chris
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Lithium Polymer battery chargers operate using a CC+CV charging profile, this means that the current (Amps or Milli-Amps) set will apply to the charge cycle during an initial "Constant Current" mode until the voltage of the pack reaches around 4.0V per cell. After this the charger will change mode to Constant Voltage charging and will terminate when the pack is drawing only a very small amount of current.
Charge Rate: The LiPo should normally be charged at 1C during the Constant Current phase of charging (the charge current setting on the charger). This means that an LiPo 1800 mAh pack should normally be charged at 1.8 Amps (or 1800 Milli Amps). This will result in a pack that is 90% full in around 1 hour....so "absolutely" full will take a bit longer...
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Follow these instructions together with a GOOD charger, and your LiPos will thank you with good performance and a long life.
Chris
Benjamin Kenobi
Easy? You call that easy?
Great answer. It doesn't protect your lipo charging to only 4.1v. It's over discharging that you need to be careful of. And not leaving fully charged for long periods of time.
kloner
Aerial DP
your not suppose to leave it at all, but a week would be considered normal. after a few weeks and if they hit heat like house gets hot cause you kill the ac for vacation or whatever will make damage. it's not alot, but any is bad
I had posted some info on this a long time ago. forget where it was, but i believe everything done right then storing them in the fridge crisper was a 1% loss of IR, at 70 degrees same situation is like 4% damage and over 100 is like 20% damage and that's stored at storage voltage. adding fully charged can range from no damage to puffing a pack. I've kinda seen it go both ways over the years. heat is the worst, leaving charged is a close second worse you can do. flying it not charged at all is like taking grandmas car muddin, who knows what'll happen but it aint gonna be good
I had posted some info on this a long time ago. forget where it was, but i believe everything done right then storing them in the fridge crisper was a 1% loss of IR, at 70 degrees same situation is like 4% damage and over 100 is like 20% damage and that's stored at storage voltage. adding fully charged can range from no damage to puffing a pack. I've kinda seen it go both ways over the years. heat is the worst, leaving charged is a close second worse you can do. flying it not charged at all is like taking grandmas car muddin, who knows what'll happen but it aint gonna be good
ChrisViperM
Active Member
A fully charged LiPo you can leave for a couple of days....but keep it cool (like in a normal fridge)...If you store them longer, use the "Storage" program which every good charger should have. Don't make yourself crazy with all the Math on LiPo's, just get yourself a good charger (...did I mention already to get a good charger ? ) and all your worries are taken care of. A good charger is a one-time investment and let's you sleep like a baby.
Chris
Chris
ChrisViperM
Active Member
You are well set up with your Hyperion...
Yeap it protect your lipo..! One of the best chargers is PL8... On this you will find long life charge and the normal charge..!
On the long life the only difference is that you charge til 4.1v per cell..! I think that they know something better..!
Ok i need a little help here....
I have 2 x 4s 4000mha 40c and i want to chage them in parallel but i don't know if my charger is powerfull enough....150 watts in DC and 90 watts in AC...
The equation for the Watts is Volts x Amps..
But what it the volts value in the equation?
tks guys
tks
I have 2 x 4s 4000mha 40c and i want to chage them in parallel but i don't know if my charger is powerfull enough....150 watts in DC and 90 watts in AC...
The equation for the Watts is Volts x Amps..
But what it the volts value in the equation?
tks guys
tks
Last edited by a moderator:
ChrisViperM
Active Member
Please read this carefully, especially the "Drawback" section.....
https://sites.google.com/site/tjinguytech/charging-how-tos/parallel-charging
I personally stay away from charging LiPo' in paralell. If time is critical for you, get a second charger (compared to the price of LiPo's its not a bad investment) ...or sell your charger and get one with 2 outputs and a decent DC power supply, something like this:
http://www.miracle-mart.com/store/mobile.php?main_page=product_info&products_id=8541
and this:
http://www.miracle-mart.com/store/m...d=9128&zenid=8900dad683ad84f13c81dd5c7b21b6e5
....these are just examples.
Chris
https://sites.google.com/site/tjinguytech/charging-how-tos/parallel-charging
I personally stay away from charging LiPo' in paralell. If time is critical for you, get a second charger (compared to the price of LiPo's its not a bad investment) ...or sell your charger and get one with 2 outputs and a decent DC power supply, something like this:
http://www.miracle-mart.com/store/mobile.php?main_page=product_info&products_id=8541
and this:
http://www.miracle-mart.com/store/m...d=9128&zenid=8900dad683ad84f13c81dd5c7b21b6e5
....these are just examples.
Chris