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Thread: 18650's Care and Maintenance

  1. #61
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by roadkill1109 View Post
    Would it be wise to discharge an 18650 to the appropriate (storage voltage) or is it okay to just keep it as is after charging?
    I'd also like to know the answer to this question. I just received new 18650 batteries...4 x Sanyo NCR18650GA, all read 3.52V with my DMM, 3 X Sony 18650 VTC6, 2 are 3.50V, 1 is 3.49V, and 2 X Panasonic NCR18650B, both read 3.54V. Can I store these batteries at their current volts, or should I charge them first?

  2. #62
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Ag76 View Post
    I'd also like to know the answer to this question. I just received new 18650 batteries...4 x Sanyo NCR18650GA, all read 3.52V with my DMM, 3 X Sony 18650 VTC6, 2 are 3.50V, 1 is 3.49V, and 2 X Panasonic NCR18650B, both read 3.54V. Can I store these batteries at their current volts, or should I charge them first?
    If you want to do it right for long term storage charge or discharge them to 3.6 - 3.7v and store in a cool place, the fridge being an option if the wife will allow it. This will give you max storage life. If they are going to be used in a week or two leave them fully charged. Of course be sure your DMM is reasonably accurate. Some of the top end chargers have a storage mode to adjust the voltage for you.
    SkyRC MC3000, Opus BT-C3400 3.1, La Crosse BC 9009, Saitek SmartCharger. Utorch UT01, UT02. Convoy C8, M2, S2+, 502b. Triton M30. Hugsby XP1 and XP2.

  3. #63
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Torchmee View Post
    If you want to do it right for long term storage charge or discharge them to 3.6 - 3.7v and store in a cool place, the fridge being an option if the wife will allow it. This will give you max storage life. If they are going to be used in a week or two leave them fully charged. Of course be sure your DMM is reasonably accurate. Some of the top end chargers have a storage mode to adjust the voltage for you.
    I went ahead and fully charged them with the VC4, but it doesn't look like it has a storage mode to adjust voltage. I've thought about running each battery in a light until I lower the voltage to 3.7V, but that seems like a lot of trouble. Maybe I should look for a charger that has a storage mode. Thanks for the help, Torchmee.

  4. #64
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Ag76 View Post
    I went ahead and fully charged them with the VC4, but it doesn't look like it has a storage mode to adjust voltage. I've thought about running each battery in a light until I lower the voltage to 3.7V, but that seems like a lot of trouble. Maybe I should look for a charger that has a storage mode. Thanks for the help, Torchmee.
    Wow I just looked up the VC4 specs and I see it doesn't discharge battery's. So unless you plan on purchasing another charger you could just go ahead and use them in a light and when you are recharging pull them off when they reach the voltage you want.

    If you are going to be doing it often and want to spend the money then a different charger would be handy. There are a couple available that have an automatic storage function or some allow you to set a desired voltage and then discharge to that voltage. If you get one that will discharge, and there are many, but will not do it automatically you will have to monitor as its discharging and pull the battery when it reaches your desired voltage. All depends on how much you want to spend. Myself or others on here can recommend one if you give a price range you are willing to spend.
    Last edited by Torchmee; 02-26-2017 at 01:48 PM.
    SkyRC MC3000, Opus BT-C3400 3.1, La Crosse BC 9009, Saitek SmartCharger. Utorch UT01, UT02. Convoy C8, M2, S2+, 502b. Triton M30. Hugsby XP1 and XP2.

  5. #65
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Torchmee View Post
    Wow I just looked up the VC4 specs and I see it doesn't discharge battery's. So unless you plan on purchasing another charger you could just go ahead and use them in a light and when you are recharging pull them off when they reach the voltage you want.

    If you are going to be doing it often and want to spend the money then a different charger would be handy. There are a couple available that have an automatic storage function or some allow you to set a desired voltage and then discharge to that voltage. If you get one that will discharge, and there are many, but will not do it automatically you will have to monitor as its discharging and pull the battery when it reaches your desired voltage. All depends on how much you want to spend. Myself or others on here can recommend one if you give a price range you are willing to spend.

    Torchmee, can you recommend a good charger that will discharge to a preset voltage? I almost went ahead and purchased an Opus BT-c3100/3400 since it seems to be highly recommended on the forum, but I decided to hold off buying more stuff until I can learn enough to be sure I'm getting what I really need. I would probably budget whatever it takes to get the right charger. I don't think I could figure out how to operate the SkyRC M3000, so I probably wouldn't consider that one. After finding this forum, I've been on somewhat of a spending spree, and my wife thinks I've developed an obsession with flashlights. I had no idea it could be this much fun! Thanks for the help.

  6. #66
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Ag76 View Post
    Torchmee, can you recommend a good charger that will discharge to a preset voltage? I almost went ahead and purchased an Opus BT-c3100/3400 since it seems to be highly recommended on the forum, but I decided to hold off buying more stuff until I can learn enough to be sure I'm getting what I really need. I would probably budget whatever it takes to get the right charger. I don't think I could figure out how to operate the SkyRC M3000, so I probably wouldn't consider that one. After finding this forum, I've been on somewhat of a spending spree, and my wife thinks I've developed an obsession with flashlights. I had no idea it could be this much fun! Thanks for the help.
    The Opus is a great charger and I wouldn't ever get rid of mine but unfortunately it will not auto discharge to storage voltage so you would have to manually monitor it and pull them. However it would be significant a step up from the VC4. Right now as far as I can tell the MC3000 is the only non hobby charger that has an actual storage mode that will discharge to the proper voltage unattended. You can also use the discharge mode and set whatever cut off voltage you want and it will do it unattended as well.

    The MC3000 is the most versatile advanced charger/analyzer out there IMO. Yes it is more complicated, expensive and has a greater learning curve than the other chargers but it does so much more! It will be the last charger you ever buy for cylindrical cell battery's. Don't sell your self short on being able to operate it. If you like computers and gadgets, have a little patience and are willing to sit down with the manual and practice you can master it in no time. You have this forum for help and there are lots of Youtube videos. The manual details every mode and setting and a forum member has made a nice cheat sheet for us.

    I suggest you download the manual and study it first to get an idea of what it will do. Watch the videos (search SkyRC MC3000 on youtube) and remember it will be easy when you have it to practice on. It does have a "dummy mode" that operates as easy as say the Opus and other less advanced chargers to get you started. As you study up on it you will find comments about teething problems found on the early models but they have been corrected on the latest production ones. I love mine and if I had bought it before the other chargers I have I wouldn't need or own any of them. If you really get into flashlights and battery charging you might as well spend the money on the best now and be done with it.

    If you decide to buy one I will direct you to a distributor here in the US who will handle any warranty issues immediately and will give you an as good or better price than you can get on the China sites. $80 plus what ever the actual USPS shipping is from Ca. It will arrive in 2 to 5 days depending on where you live instead of the 3-4 weeks or more from China with basically no warranty. I got mine to my door for $85. He also sells the Opus if you decide to go that route.

    All of the above is my opinion and I have no connection with SkyRc, Opus or the above seller. I just appreciate fine electronics and enjoy helping others do the same. Link to the factory MC3000 manual: http://www.skyrc.com/index.php?route...ownload_id=168
    SkyRC MC3000, Opus BT-C3400 3.1, La Crosse BC 9009, Saitek SmartCharger. Utorch UT01, UT02. Convoy C8, M2, S2+, 502b. Triton M30. Hugsby XP1 and XP2.

  7. #67
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Torchmee View Post
    The Opus is a great charger and I wouldn't ever get rid of mine but unfortunately it will not auto discharge to storage voltage so you would have to manually monitor it and pull them. However it would be significant a step up from the VC4. Right now as far as I can tell the MC3000 is the only non hobby charger that has an actual storage mode that will discharge to the proper voltage unattended. You can also use the discharge mode and set whatever cut off voltage you want and it will do it unattended as well.

    The MC3000 is the most versatile advanced charger/analyzer out there IMO. Yes it is more complicated, expensive and has a greater learning curve than the other chargers but it does so much more! It will be the last charger you ever buy for cylindrical cell battery's. Don't sell your self short on being able to operate it. If you like computers and gadgets, have a little patience and are willing to sit down with the manual and practice you can master it in no time. You have this forum for help and there are lots of Youtube videos. The manual details every mode and setting and a forum member has made a nice cheat sheet for us.

    I suggest you download the manual and study it first to get an idea of what it will do. Watch the videos (search SkyRC MC3000 on youtube) and remember it will be easy when you have it to practice on. It does have a "dummy mode" that operates as easy as say the Opus and other less advanced chargers to get you started. As you study up on it you will find comments about teething problems found on the early models but they have been corrected on the latest production ones. I love mine and if I had bought it before the other chargers I have I wouldn't need or own any of them. If you really get into flashlights and battery charging you might as well spend the money on the best now and be done with it.

    If you decide to buy one I will direct you to a distributor here in the US who will handle any warranty issues immediately and will give you an as good or better price than you can get on the China sites. $80 plus what ever the actual USPS shipping is from Ca. It will arrive in 2 to 5 days depending on where you live instead of the 3-4 weeks or more from China with basically no warranty. I got mine to my door for $85. He also sells the Opus if you decide to go that route.

    All of the above is my opinion and I have no connection with SkyRc, Opus or the above seller. I just appreciate fine electronics and enjoy helping others do the same. Link to the factory MC3000 manual: http://www.skyrc.com/index.php?route...ownload_id=168
    I had ruled out the SkyRC, but you've given me enough good information to make me think I should reconsider. I'll definitely look at the manual to see what's involved. I would also appreciate knowing the U.S. based seller you recommend for either the SkyRC or Opus. You've given me some good options to consider, and I appreciate the help.

  8. #68
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Ag76 View Post
    I had ruled out the SkyRC, but you've given me enough good information to make me think I should reconsider. I'll definitely look at the manual to see what's involved. I would also appreciate knowing the U.S. based seller you recommend for either the SkyRC or Opus. You've given me some good options to consider, and I appreciate the help.
    I sent you a forum private message, check it.
    SkyRC MC3000, Opus BT-C3400 3.1, La Crosse BC 9009, Saitek SmartCharger. Utorch UT01, UT02. Convoy C8, M2, S2+, 502b. Triton M30. Hugsby XP1 and XP2.

  9. #69
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Torchmee View Post
    I sent you a forum private message, check it.
    Got it, thanks.

  10. #70
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    Default Re: 18650's Care and Maintenance

    Quote Originally Posted by Torchmee View Post
    If you want to do it right for long term storage charge or discharge them to 3.6 - 3.7v and store in a cool place, the fridge being an option if the wife will allow it. This will give you max storage life. If they are going to be used in a week or two leave them fully charged. Of course be sure your DMM is reasonably accurate. Some of the top end chargers have a storage mode to adjust the voltage for you.
    Be aware that 3.6-3.7V is far too low for some chemistries (can be below 10% SOC). Generally a good storage voltage is in the range 35-50% SOC, depending on length of storage, ambient temperature, etc. See HKJs charts for Voltage vs SOC for some common chemistries.

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