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  1. #1
    RC Turnbuckle Jr. Wolfslash16's Avatar
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    Lipo Use/Care Questions

    Hey guys, I'm about 99% sure I'm going to get lipos for my Summit here in the next month, so I have a few questions. I'm not sure I understand fully how to care for and use lipos, so I'll just say what I know, and if I'm missing somthing, or somthing inncorrect, PLEASE let me know.


    Never drain them past the low voltage, always use LVD.
    If you don't use them for at least 3 days, put them in storage mode, at 3.8 volts to prevent damage.
    Never over charge them, or short them. (DUH!)
    If it puffs up, stop using it.
    You can charge them at much higher charge rates. (6amps?)
    Always balence them while charging.

    Ok, now here's some questions.
    I have the Traxxas EZ Peak Plus, and the lipos I'm going to get are the SPC 2s 8200mah lipos. Can I charge them both at the same time (using the dual lipo charger thingy) at 6amps? Also, can I balance charge them at the same time? If I'm done using my Summit after it hits LVD, do I need to charge the batterys as soon as I can, or can I wait a day or so to charge them and not hurt them? If I only charge it partly or a little bit, is it safe to leave them for a day or so with a "random" charge on it? Anything I'm missing? I want to know EVERYTHING there is to taking care of lipos. Thanks!
    Last edited by Wolfslash16; 02-15-2013 at 04:16 PM.
    Sl2sh Slayer Summit Sl4sh Teton/Rally T-Maxx Pnde

  2. #2
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    2s 8200 sounds good i use 2 2s 5200 and get a 45 min run time. thats running it hard the whole time. with no heat from the motor or esc as for your q n a. i dont know i charge mine use it let it sit at what its at or full charge then let it sit foir days never had a problem. and had them for like a year. u heed one the of the pros on here to chime in. but good luck.

  3. #3
    RC Turnbuckle Jr. mike-susieq1's Avatar
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    https://sites.google.com/site/tjingu...arging-how-tos
    check that out read about lipo safety and how to charge and how to parallel charge. This will help with what you need.
    DEU 8:18 ESV

  4. #4
    RC Turnbuckle Jr. billy-bones's Avatar
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    They say don't do this ,so if I were you don't,but I leave my lipos fully charged for two or more months with no ill effects, In fact I have a brand new Reedy 6500mah 2s 65c bought it charged it,intending to use it,but never did.
    I personally think the most important thing,is to not store them with out at least half a charge,as they will slowly lose charge on their own.
    This is just my opinion,just because i have never had issues leaving them charged,doesn't make it right. and I am in no way a lipo specialist.
    Built Ford Tuff With Chevy Stuff.

  5. #5
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    Quote Originally Posted by billy-bones View Post
    They say don't do this ,so if I were you don't,but I leave my lipos fully charged for two or more months with no ill effects, In fact I have a brand new Reedy 6500mah 2s 65c bought it charged it,intending to use it,but never did.
    I personally think the most important thing,is to not store them with out at least half a charge,as they will slowly lose charge on their own.
    This is just my opinion,just because i have never had issues leaving them charged,doesn't make it right. and I am in no way a lipo specialist.
    Your trashing your lipos by doing this.

    A lipo should never be kept at full charge for more than a couple of days. Otherwise at full charge, overtime the internal resistance of the cells will break down from too much voltage being stored in them.

    I mentioned this in another thread, but lipos are something I'm familiar with from flying rc helicopters. My 700 runs on 12s and those batteries are not cheap at 150 a pack (and you need 2). All my lipos show no signs of puffing and after 200+ cycles are still going strong. Below is how I handle my lipos to ensure they last me.

    Never keep charged longer than 3 to 4 days max.

    Never discharge lower than 3.7 volts, on 2s I set my tqi to beep at 7.5 Volta, battery comes off with about 20% left which is perfect. Over discharging a cell can damage or kill it.

    Always charge at a safe c rating. My gens ace are rated for 5c,I charge at 2C and never more than 3c. Depending on your charger you may need to charge at a lower c rating, depends on what the battery can handle and how many amps the charger does.

    Store your lipos at storage charge when not in use, 3.8 volts per cell. Keep them stored in a cool dry place.


    If you follow these tips your lipos will last you a long time. A cell checker is another great tool so you can check your batteries at a glance. Also a good balance charger and power supply is key. A good charger will balance charge your lipos and keep the balance of the cells in check. I'm an Icharger fan and have the 306b with 1000w ps. That's overkill for you situation unless you parallel charge.

  6. #6
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    Quote Originally Posted by Wolfslash16 View Post
    You can charge them at much higher charge rates. (6amps?)
    Only charge at greater than 1C if the battery manufacturer says its okay (i.e., it's printed on the label). Understand, though, that even if a manufacturer says it's okay to charge at 2C (or more), it can shorten their useful life. That's why personally, I've always charged every pack I own at 1C, regardless of what the label says. You have a nice little multi-port charger, so there's really no need to "fast charge" em. My $.02!

    (Enter Jimmie Neutron, who will probably disagree with me...)
    Make it idiot-proof and along comes a better idiot

  7. #7
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    Quote Originally Posted by Gawl View Post
    Your trashing your lipos by doing this. A lipo should never be kept at full charge for more than a couple of days. Otherwise at full charge, overtime the internal resistance of the cells will break down from too much voltage being stored in them.
    ^^^ Listen to this man. The only LiPo I've ever puffed was stored at full charge for months.
    Make it idiot-proof and along comes a better idiot

  8. #8
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    I have those same batteries and charger with the dual charger thing

    They last forever lol, I haven't even got them below 3.80 yet, I just end up getting bored after about 45 minutes

    dual charging them from 3.8 at 6 amps (3 amps each) takes a little over an hour so from 3.5 it would take about 2 and a half hours
    What's a coffee if it aint Irish

  9. #9
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    So, what is the recommended proceedure if you do have a puffed up lipo? From what I gather: Discharge it (but not using the discharge feature on the charger?). Sink it in salt water for a few days. Chuck it.
    Anyone with good advice on this?

  10. #10
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    there are places that safely dispose of batteries, not sure if it's free or a few bucks but that's the best way
    What's a coffee if it aint Irish

  11. #11
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    Quote Originally Posted by Captain Switchblade View Post
    So, what is the recommended proceedure if you do have a puffed up lipo? From what I gather: Discharge it (but not using the discharge feature on the charger?). Sink it in salt water for a few days. Chuck it.
    Anyone with good advice on this?
    I've heard about the saltwater thing, but it's kinda silly IMO. Discharge the pack as much as you can, then throw it away in the trash. That's how I disposed of my puffed LiPo.

    Was that wrong?
    Make it idiot-proof and along comes a better idiot

  12. #12
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    No, not wrong.
    The purpose of the salt water bath is to make sure they are fully discharged. This can be done with an automotive light bulb too. Once fully discharged they are safe to do whatever to them... as in they will no longer flare out.
    Whatever it is I just typed... could be wrong.

  13. #13
    RC Turnbuckle Jr. Wolfslash16's Avatar
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    Ok, thanks guys! Dumb question, what voltage does the EVX 2 on the Summit stop at?
    Sl2sh Slayer Summit Sl4sh Teton/Rally T-Maxx Pnde

  14. #14
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    For me:
    Stage 1 3.6
    Stage 2 3.4
    Whatever it is I just typed... could be wrong.

  15. #15
    RC Turnbuckle Jr. Wolfslash16's Avatar
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    For me:
    Stage 1 3.6
    Stage 2 3.4
    Ok, that sounds really low to me... Is it ok to run them that lowq normally? I'm, guessing so because Traxxas made it that way...
    Sl2sh Slayer Summit Sl4sh Teton/Rally T-Maxx Pnde

  16. #16
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    That is per cell... not low at all.
    Damage does not occur until 3v/cell.
    Whatever it is I just typed... could be wrong.

  17. #17
    RC Turnbuckle Jr. Wolfslash16's Avatar
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    Oh. LOL, ok. Thanks Jimmie, you always seem to know how to help!
    Sl2sh Slayer Summit Sl4sh Teton/Rally T-Maxx Pnde

  18. #18
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    Quote Originally Posted by Jimmie Neutron View Post
    No, not wrong.
    The purpose of the salt water bath is to make sure they are fully discharged. This can be done with an automotive light bulb too. Once fully discharged they are safe to do whatever to them... as in they will no longer flare out.
    Great, thank alot

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