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  1. #1
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    LiPo Voltage Question

    Hi, I opened a thread about a puffed battery. Tonight I am buying a new one and now changing some of the ways that I used on the old LiPo. Since I have learned the hard way to not store a battery at full charge, and don't own a multimeter, how can I store my LiPos when not using it. Should I run the battery near LVC and store it or should I balance it just a little bit before? Any replies will be appreciated.

  2. #2
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    Do you have a charger with storage mode? Storage mode charges or discharges your pack until it reaches 3.8v PER CELL.
    Make it idiot-proof and along comes a better idiot

  3. #3
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    I have a Passport LiPo, so no I do not.

  4. #4
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    I've been learning a lot about storage mode from Jimmie Neutron, et. al. It's supposed to be beneficial when you're not using your batteries for a few days or longer...that's why I mention it. Now between you, me, and the entire forum , I have not used storage mode in the past and have never had a problem with my LiPos. The most important things to remember:

    1. Don't leave 'em sit with a full charge (as you've learned ,
    2. Don't overcharge -- 4.2v max per cell!
    3. Don't over DIScharge 3.5v minimum per cell,
    4. Always balance charge,
    5. Use a LiPo charging sack or Battery Bunker,
    6. Check each pack's individual cells with a cell checker (Dynamite makes one, sold at A-Main Hobbies).
    Make it idiot-proof and along comes a better idiot

  5. #5
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    Quote Originally Posted by iaustin7 View Post
    Hi, I opened a thread about a puffed battery. Tonight I am buying a new one and now changing some of the ways that I used on the old LiPo. Since I have learned the hard way to not store a battery at full charge, and don't own a multimeter, how can I store my LiPos when not using it. Should I run the battery near LVC and store it or should I balance it just a little bit before? Any replies will be appreciated.
    Buy yourself a LVD with buzzer off ebay for less then $10. I use one with a auto bulb light a 1175 bulb for discharging .
    1 Rusty VXL

  6. #6
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    Storage is 3.85 per cell .
    1 Rusty VXL

  7. #7
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    Just went to the shop and got a 2S LiPo 5000mAh and a large charging bag. Thanks everyone for your replies!

  8. #8
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    Quote Originally Posted by zippogeek View Post
    I've been learning a lot about storage mode from Jimmie Neutron, et. al. It's supposed to be beneficial when you're not using your batteries for a few days or longer...that's why I mention it. Now between you, me, and the entire forum , I have not used storage mode in the past and have never had a problem with my LiPos. The most important things to remember:

    1. Don't leave 'em sit with a full charge (as you've learned ,
    2. Don't overcharge -- 4.2v max per cell!
    3. Don't over DIScharge 3.5v minimum per cell,
    4. Always balance charge,
    5. Use a LiPo charging sack or Battery Bunker,
    6. Check each pack's individual cells with a cell checker (Dynamite makes one, sold at A-Main Hobbies).
    Minimum is 3.0v/cell... not 3.5...
    Well... actually it is 2.5 as an absolute do not go there... that is why 3.0 is the low.
    But... do not set a LVA that low if you have a choice... 3.3 or higher, please.
    Whatever it is I just typed... could be wrong.

  9. #9
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    I have 2 alarms and the meter.
    http://www.amazon.com/Bluecell-Digit...rds=Lipo+alarm
    This is a good deal since you get an alarm and a meter for $2 more than one or the other. Alarm can be used as a meter but it is noisy when you plug it in.

    I usually drive my cars till they get to storage voltage or charge them up to storage voltage.
    3.7-3.8 is where I put them.
    Last edited by Zepher; 02-12-2013 at 09:51 PM.
    ERBE, ERBE, Summit, Slash 4X4, Bandit,

  10. #10
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    I'm a truck driver and I'm only home on weekends. What I do with my batteries is. My charger has a storage setting. It will bring each of my cells to 3.8volts. If they are under that volt it will bring it up. If they are over it will bring it down. If your charger does not have that setting just charger or discharge them till they reach 3.8 each cell. I've been doing it to all my batteries since news and they work great.

  11. #11
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    When you storage charge a battery, do you charge it at the normal amps on Storage Charge or is there a special calculation for charging on storage mode? I usually charge my 2s 8200mah lipo at 8.2 Amps, so would I do the same except on storage mode?
    Dirt Slingerz Racing
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  12. #12
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    No special calculation... set for normal amps.
    Whatever it is I just typed... could be wrong.

  13. #13
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    OK. Thanks Jimmie
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  14. #14
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    Quote Originally Posted by Jimmie Neutron View Post
    Minimum is 3.0v/cell... not 3.5...
    Well... actually it is 2.5 as an absolute do not go there... that is why 3.0 is the low.
    But... do not set a LVA that low if you have a choice... 3.3 or higher, please.
    Thanks Jimmie.
    Make it idiot-proof and along comes a better idiot

  15. #15
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    If I am right, a 2S lipo has 2 cells? I am looking at the cell voltage on my one battery that is storage charging at 8.2 amps like I would normally charge it. The cell voltage count for the 2 cells is currently 3.86. Is that to much or is it going to be around that number?
    Dirt Slingerz Racing
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  16. #16
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    A 2S LiPo as at least 2 cells... they can have more.

    Are you sure you have the pack connected properly?
    If the pack voltage is that low, the pack is ruined.

    If you press the right arrow on your 206B, it will tell you the cell voltages.
    Whatever it is I just typed... could be wrong.

  17. #17
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    The pack voltage says 7.81 but the charger just beeped off and it says 3.85 per cell and the pack voltage is 7.65
    Last edited by Jacob Chandler; 02-12-2013 at 11:22 PM.
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  18. #18
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    What are the cell voltages when you press the right arrow?
    Whatever it is I just typed... could be wrong.

  19. #19
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    Quote Originally Posted by Jacob Chandler View Post
    If I am right, a 2S lipo has 2 cells? I am looking at the cell voltage on my one battery that is storage charging at 8.2 amps like I would normally charge it. The cell voltage count for the 2 cells is currently 3.86. Is that to much or is it going to be around that number?
    Correct, 2S = 2 cells.

    When fully charged, a single 3.7v LiPo cell should actually have 4.2v max; 3.7v is just the nominal. So a 2S pack will have 8.4v max...not 7.4
    Make it idiot-proof and along comes a better idiot

  20. #20
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    Cell voltages are 3.82.
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