11.1v lipo voltage question

[13thlevel]

With an 11.1v lipo what is considered fully charged, 50% charged and discharged. What are the voltage readings for each condition? Not per cell, voltage combined. I need to know what voltage to store a 11.1v lipo at, but I want to know the other voltages too for reference. -Thanks

[Coolice]

Hey,

Each fully charged LiPo cell should read 4.2 volts, so a 3 cell 11.1v pack fully charged will register 12.6 volts. I see this when my 3s LiPo's come off charge.

Discharged, no individual LiPo cell must go below 3 volts per cell to maintain a good lifespan.
So in the case of our 3s 11.11volt LiPo the overall pack voltage must not go below 9 volts (3 x 3volts = 9).

50% of this isn't really necassary to know I dont feel, but in any case a LiPo must not loose more than 80% of it's capacity during a flight.
If we look at a 1000mah LiPo pack that means during a flight we can use 800mah of the 1000 to prolong pack life.

Hope this helps?
.

[13thlevel]

Hey,

Each fully charged LiPo cell should read 4.2 volts, so a 3 cell 11.1v pack fully charged will register 12.6 volts. I see this when my 3s LiPo's come off charge.

Discharged, no individual LiPo cell must go below 3 volts per cell to maintain a good lifespan.
So in the case of our 3s 11.11volt LiPo the overall pack voltage must not go below 9 volts (3 x 3volts = 9).

50% of this isn't really necassary to know I dont feel, but in any case a LiPo must not loose more than 80% of it's capacity during a flight.
If we look at a 1000mah LiPo pack that means during a flight we can use 800mah of the 1000 to prolong pack life.

Hope this helps?
.


Excellent info, I'm going to write that down and try to remember it.

The other question about 50% was because I heard for storage 40-50% was where it should be. What voltage should I store the lipo at?
This all stems from my brand new Thunder Power battery developed a leak. I assume this was due to keeping the battery at full charge for over a week. The reason was I charged the battery and tried to fly my heli, but sadly I crashed even before lift-off, and broke several parts. Hence, battery fully charged for over a week......................whew!

Thunder Power has excellent customer support because they had a new battery on it's way the next day after I called them and told them my new lipo was leaking.:arggg::arggg::arggg::arggg::arggg::arggg: :arggg::arggg::arggg::arggg::arggg::arggg::arggg:

[BarracudaHockey]

Storage = months at a time, not days or between flying weekends.

[Helifarns]

I assume this was due to keeping the battery at full charge for over a week.

Yeah, that doesn't sound right.

[ShotgunTC88]

What kind of charger do you have?

If you are just starting out I would get one like the FMA Direct Revoloution 4,($74) it is pretty much foolproof for your charging needs.
(I have that and a TRITON and get by pretty good on all my needs)

The TRITON is nice also, But you have to get used to punchin buttons.and you could goof up and ruin your battery if your new to Lipos

There are MANY other higher end chargers with lot's more goodies but If money is tight the FMA Charger is as safe as you can get for your charging purpose's and will be all you need for awhile, at least with Small Helis.

I would always start out when learning to use your Lipos by charging them in a safe place outside or at least in one of those Wal-Mart "Brinks" little fire resistent boxs ($29)

After a crash, ALWAYS take the battery out and set it in the yard for around 30mins to make sure it isnt gonna have problems, and inspect it CLOSELY after the wait.
If it has any leakage or tears or bends, I would not use it and probably get rid of it for safety.

IF you see any "swelling" or the pack feels "bloated" it is time to retire it in most case's,
(I HAVE flown "puffed" packs, But I admit I am an idiot for doing so. )

Dont be overly scared, they are not timebombs!

They just CAN be dangerous if you dont handle/charge/discharge/use them with care.

Do yourself a BIG favor and study up on Lipos and follow the rules from what you learn here.
(All the guy's on here are ready to help and have great knowledge!, dont be shy to ask on anything you doubt first!)

Dive in to the F.A.Q on Lipos and learn all you can to get good info, See which batteires/chargers the pros here use and go by what they reccomend!, (Remember I am a "Noob" with Electric Helis myself<G>)

When I started out, I spent WAY more money on Lipos than crashes, because I mistreated them and did not read and study abit about them FIRST! ,And LUCKILY I didnt burn down the house (or Heli/or me) in the process.

If you want to see what they can do if abused, Go to "YouTube" and type in Lipo fire.
(I have to admit I did take one "dead" one out in the yard and blew it and I sure as hell don't want that to happen by accident!)

They are SAFE as any other battery,

The just need more care in use and handling.

I am a begainer with Lipos for the most part myself, So learn more from the start than I did and save yourself some money and "Valium" moments! <GGG>

Later bro
Shotgun

[ShotgunTC88]

With an 11.1v lipo what is considered fully charged, 50% charged and discharged. What are the voltage readings for each condition? Not per cell, voltage combined. I need to know what voltage to store a 11.1v lipo at, but I want to know the other voltages too for reference. -Thanks


Really, Go check out FMA Direct website and read up on the REVOLOUTION charger!, I bet it will do everthing you need without the hassle for now........


.02
Shotgun

[Pinecone]

3.8 - 3.85 volts per cell is about 50% for long term storage. Some chargers, like the FMA CellPro A123 and the Thunder Power 1010C both will charge to this number for storage.

I try to get them to this point for staorage of more than 2 - 3 weeks (IOW a month or more).