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Thread: simple charger

  1. #1
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    simple charger

    i got the simple lipo charger from traxxas, but does it come with peak sensing tech
    All I need now is to set a new lap record.

  2. #2
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    I need to know, since im insecure to buy it if I cant keep track of it
    and the lipo is 20c 2s, will it work?
    All I need now is to set a new lap record.

  3. #3
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    LiPo does not charge using peak detection.

    It is not recommended to charge LiPo's unattended.

    What is the mAh?
    Whatever it is I just said... I could be wrong.

  4. #4
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    4000mah cap.
    All I need now is to set a new lap record.

  5. #5
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    If this is the charger:
    http://traxxas.com/products/parts/ch...ipo2s3scharger

    250 Minutes of charge time when it is at 3.3 v/cell to full
    222 Minutes of charge time when it is at 3.4 v/cell to full
    194 Minutes of charge time when it is at 3.5 v/cell to full
    167 Minutes of charge time when it is at 3.6 v/cell to full
    139 Minutes of charge time when it is at 3.7 v/cell to full
    111 Minutes of charge time when it is at 3.8 v/cell to full
    83 Minutes of charge time when it is at 3.9 v/cell to full
    56 Minutes of charge time when it is at 4.0 v/cell to full
    28 Minutes of charge time when it is at 4.1 v/cell to full
    0 Minutes of charge time when it is at 4.2 v/cell to full

    The charger should stop when it is full... but if you are not going to use the battery for a few days, it should not sit with a full charge... the charge should be around 3.8v/cell.
    Whatever it is I just said... I could be wrong.

  6. #6
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    Quote Originally Posted by Jimmie Neutron View Post
    LiPo does not charge using peak detection.

    It is not recommended to charge LiPo's unattended.

    What is the mAh?
    When you say its not recommended, are you talking specifically for this charger or in general? I want to buy one for my smaller brother so that he can charge his merv without too much hassle and the way you said that i thought that they might me more unsafe than regular chargers.
    Last edited by uninterrc; 01-27-2013 at 06:08 PM.
    SUPERMAXX, ERBE, T-MAXX, MERV
    SAVAGE &TROPHY FLUX

  7. #7
    Marshal Double G's Avatar
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    Batteries should be watched while charging. Even with safeguards in place something can happen.
    Lipos charge differently than nimhs so use the right charger for the battery type.
    Gasoline does not play well in diesel engines nor does diesel produce positive results in gasoline engines. Use the right charger for the battery.
    The Super Derecho

  8. #8
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Batteries left unattended of any chemistry can result in Double G coming to put out the flames.
    Whatever it is I just said... I could be wrong.

  9. #9
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    so how does c-rating work? the manuel says that not to charge over 1c or a diff. c-rating is recorded otherwise
    All I need now is to set a new lap record.

  10. #10
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    yes it is, and I don't have a voltage meter, my last one broke, and it was a gift from someone from out-of-town(partial quote that this responds to)
    Quote Originally Posted by Jimmie Neutron View Post
    If this is the charger:
    http://traxxas.com/products/parts/ch...ipo2s3scharger


    The charger should stop when it is full... but if you are not going to use the battery for a few days, it should not sit with a full charge... the charge should be around 3.8v/cell.
    and how can charge it that way
    Last edited by f687s; 01-28-2013 at 07:33 AM.
    All I need now is to set a new lap record.

  11. #11
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Quote Originally Posted by f687s View Post
    so how does c-rating work? the manual says that not to charge over 1c or a diff. c-rating is recorded otherwise
    To calculate the charge rate of your pack
    mAh x charge C rate / 1000 = charge amps
    For example:
    A 2200mah 20-40C pack that states a 2C charge rate.
    2,200 x 2 / 1000 = 4.4
    This battery pack can be charged at 4.4 amps.
    - Please note that if no charge C rate is stated, 1C is standard.

    Quote Originally Posted by f687s View Post
    yes it is, and I don't have a voltage meter, my last one broke, and it was a gift from someone from out-of-town(partial quote that this responds to)
    and how can charge it that way
    If you do not have a voltmeter, I suggest you get a cell checker. They are available on eBay for less than $5.

    I do not understand your question "how can charge it that way".
    Whatever it is I just said... I could be wrong.

  12. #12
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    Quote Originally Posted by Jimmie Neutron View Post
    To calculate the charge rate of your pack
    mAh x charge C rate / 1000 = charge amps
    For example:
    A 2200mah 20-40C pack that states a 2C charge rate.
    2,200 x 2 / 1000 = 4.4
    This battery pack can be charged at 4.4 amps.
    - Please note that if no charge C rate is stated, 1C is standard.



    If you do not have a voltmeter, I suggest you get a cell checker. They are available on eBay for less than $5.

    I do not understand your question "how can charge it that way".
    the 3.8v per cell
    and im studying lipos at wikipedia
    All I need now is to set a new lap record.

  13. #13
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    So your question is how to stop the charge at 3.8v/cell?

    With that charger, you are going to have to monitor the charge and physically stop it. It does not have a storage feature.
    Whatever it is I just said... I could be wrong.

  14. #14
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    I wrote this a while back... but most of it applies here too:

    I apologize in advance for the length of this write up. However, I feel that it is important to have as much factual LiPo information as possible and to have it all in one location.
    That being said...

    LiPo 101
    now in session


    Rules
    1) NEVER discharge below 3v/cell
    2) NEVER charge above 4.2v/cell
    3) NEVER puncture your pack
    4) NEVER short out your pack
    5) NEVER use a pack that has puffed
    6) NEVER charge unattended
    7) NEVER charge at a higher C rate than recommended
    8) NEVER use a pack that has been over charged/discharged
    9) ALWAYS check cell voltage before connecting your pack to anything
    10) ALWAYS keep your LiPo pack well balanced

    To calculate the charge rate of your pack
    mAh x charge C rate / 1000 = charge amps
    For example:
    A 2200mah 20-40C pack that states a 2C charge rate.
    2,200 x 2 / 1000 = 4.4
    This battery pack can be charged at 4.4 amps.
    - Please note that if no charge C rate is stated, 1C is standard.

    To calculate the constant discharge rate of your pack
    mAh x minimum discharge C rate / 1,000 = available amps
    For example:
    The same 2200mah 20-40C pack.
    2,200 x 20 / 1000 = 44
    This battery pack can consistently provide up to 44 amps.

    To calculate the peak/burst discharge rate of your pack
    mAh x maximum discharge C rate / 1,000 = available amps
    For example:
    Again, the same 2200mah 20-40C pack.
    2,200 x 40 / 1000 = 88
    This battery pack can provide a peak discharge rate of up to 88 amps.
    Peak rates are limited in time... unfortunately, this amount of time does not have an industry standard. This is how a lot of inflated discharge ratings can be claimed. In my experience, honest retailers/manufactures of packs will list the constant discharge rating along with the burst discharge rating and not only the burst rating.

    Ratings
    When setting up your power system for your RC, make sure that the lower discharge C rate matches or beats the continuous amperage rating of the ESC. I try to beat it by at least 10%. This practice will provide you the most out of your system and it will also keep your batteries from working too hard. A LiPo should NEVER be warm... during use or charging. If it is, you are abusing the pack. Also, the less your pack has to work the longer it will last.


    Parallel
    Running two LiPo's in parallel will double run time and also your available amperage... which is handy for high demand systems. Some misinformation I have read about the discharge C rating of packs in parallel is that the rating of the pack doubles. This is not the case. The C-rating of a battery pack is a fixed parameter of that pack; well actually it is the cells within the pack that have the C rating. Connecting two packs in parallel does not change either pack as they still have the same specifications, however it does create a battery "system" with twice the effective C rating. The packs are the same, but the parallel system is now theoretically capable of discharging at twice the Amp rate. This is much like the cumulative capacity available when connecting two packs in parallel.

    Series
    Running two LiPo's in series will double voltage, therefore nearly doubling the speed of your RC. Capacity remains the same. The two packs ran in series MUST have the same capacity and discharge rate. They should be of the same brand as well as have the same amount of cycles on them.
    Be prepared to gear down when increasing voltage on your power system.

    Charging
    There are many charging options out there... it can get really confusing really fast. The best advise I can give is to get the absolute best charger you can afford... your charge system is the backbone of your electric RC hobby, treat it as such. RC's will come and go, but your charge system will remain.

    The following features are what I consider to be the absolute bare minimum for a charger... balance charging and a storage charge/discharge feature. Storage voltage is 3.85v/cell. If the charger cannot perform these tasks, look for another charger. If you are going to be charging multiple LiPo's at the same time or 10th scale or larger packs, I recommend getting a charger that is capable of at least 10 amps. Also, ANY half-decent charger can charge multiple LiPo's at a time. It does not require a dual or multi-charger to perform such a task. It only requires the right support equipment... I use a ParaBoard.



    Here is what I have done...
    this information might help with your decision

    I use inexpensive batteries.
    I have found them to be very reliable, extremely cost effective, and they have been proven to be under-rated; usually providing more mah and a higher discharge C rate than stated on the pack. SPC is a great brand that under promises and over delivers. There are others that claim extreme discharge ratings that are simply impossible with the technology that is available.

    I use an iCharger 206B.
    When I purchased the charger, I thought I would never use all 20 amps of its capability. Well, now I rarely charge at anything less than 20 amps lol. I have even considered selling it to get more amperage! I have performed hundreds of charge cycles with this charger and it handles the task without a single issue.
    I highly recommend any charger in the iCharger line.

    I built my own power supply.
    I have ~$30 into my 24v 75a 1800watt power supply.
    Sounds complicated, but it really is not that difficult. If you go this route, you are going to want a server power supply as they do not drop voltage when you are pulling amperage like a standard ATX PC power supply.
    You can also purchase these pre-built.

    I hope this information helps!!

    Here are some links to some more:
    http://traxxas.com/forums/showthread...rger-vs-cooker
    http://traxxas.com/forums/showthread...charging-setup
    http://traxxas.com/forums/showthread...ply-Conversion
    Whatever it is I just said... I could be wrong.

  15. #15
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    but one more ?. I want to get the ez peak plus, and I want to know if it will stop when fully charged
    All I need now is to set a new lap record.

  16. #16
    Marshal ksb51rl's Avatar
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    Quote Originally Posted by f687s View Post
    but one more ?. I want to get the ez peak plus, and I want to know if it will stop when fully charged
    Simple answer: Yes.
    Even so, one should NEVER leave a charging battery unattended.
    Alt-248 on the number pad =

  17. #17
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    thanks, that is all lipo ?s answered, thank you all that have helped
    All I need now is to set a new lap record.

  18. #18
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    Quote Originally Posted by ksb51rl View Post
    Simple answer: Yes.
    Even so, one should NEVER leave a charging battery unattended.
    I know why, not my vid
    Last edited by f687s; 01-28-2013 at 04:51 PM.
    All I need now is to set a new lap record.

  19. #19
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    I feel I should note that the LiPo in this video was being severely abused for it to behave the way it did. It looks to me like they were using a car battery charger to purposely explode the LiPo.
    I hate videos like this because some parents see it and assume any LiPo can do this at any time, no matter what precautions are taken.
    Whatever it is I just said... I could be wrong.

  20. #20
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    how will my battery react to normal overcharge, its a hard case
    All I need now is to set a new lap record.

  21. #21
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    There is no such thing as a normal overcharge with a proper charger/settings.

    It could puff... even with a hard case.
    Whatever it is I just said... I could be wrong.

  22. #22
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    so how can I tell, its a hard case
    All I need now is to set a new lap record.

  23. #23
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    It will still puff the case. The case is not that rigid.
    Whatever it is I just said... I could be wrong.

  24. #24
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    so at what charge rate can I charge it at once I get the ez peak plus?
    All I need now is to set a new lap record.

  25. #25
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    From post #14:
    To calculate the charge rate of your pack
    mAh x charge C rate / 1000 = charge amps
    For example:
    A 2200mah 20-40C pack that states a 2C charge rate.
    2,200 x 2 / 1000 = 4.4
    This battery pack can be charged at 4.4 amps.
    - Please note that if no charge C rate is stated, 1C is standard.
    Whatever it is I just said... I could be wrong.

  26. #26
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    help me out on the math
    All I need now is to set a new lap record.

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