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Panasonic NCR18650B 3400mah Amp Limit & 18650 Battery Datasheet



What is Panasonic NCR18650B amp limit, and where I can see original manufacturer datasheet to confirm exact maximum current draw?

Many people from vape, and flashlight community ask this very same question, searching for one simple (and correct) answer.
Continue reading, and you will finally see 100% correct data for NCR18650B 3400mAh Panasonic 18650 Li-ion battery:
18650 Panasonic 3400mah NCR18650B specifications datasheet
Maximum amp limit current draw is 2 C. It is called 18650 battery C rating.  I will explain C ratings in details later.
Right now in plain English, all you need to know when you see "C", and number before "C" :
Multiply the number printed just before letter C by battery capacity.
Where can I find typical rated capacity for NCR18650B?


If you read carefully this PDF document from Panasonic, you will see that typical capacity is  3350mAh, and 2 C (bottom right - battery discharge characteristics graph).

2 x 3350 = 6700mA
In Amps (Ampere) :  6.7 Amp  - much easier number to read.

Maximum NCR18650B discharge amp limit is 6.7 Amps under continuous current load.

There are many high quality 18650 batteries on the market right now.
Panasonic is leader in manufacturing lithium-ion rechargeable cells with unbelievably good quality control.



19 comments:

  1. Hey, Your post is very informative and helpful for us. In fact i am looking this type of article from some days. Thanks a lot to share this informative article.
    You can also see this MicFlip: World's First Reversible Micro USB Cable .

    Thanks

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  2. I agree with you, Panasonic NCR18650B is awesome!
    For vaping, unprotected batteries are the way to go. These batts recharge well, hold a charge for quite some time, and last for a few days of fairly constant vaping. I use these in an iTaste SVD with great results.
    You can see full details about 18650 batteries at: http://www.kategodkin.com/understanding-about-18650-battery-for-led-flashlights/

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  3. When I connect 10 of these in parallel and get 34 Amps do I then get 20C?

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    Replies
    1. Basically in parallel set up the batteries share the load it's still at 4.2 volts but each battery would carry 3.4 amps of the load. You could in theory run it up to 68 amps. That would be the max 10 of these batteries could handle which would be 20c but the batteries won't hold that load more then a few minutes before there done and need a recharge. And constant charge and discharge cycles at a cells max constant discharge severely shortens the life of the cell. If one cell failed early and your drawing max amps it could make another cell fail and vent from excessive heat. Since the other 9 batteries are being drained at past their max loads. I've seen these batteries discharged at 10 amps. And they don't do well at all. 7 amps is the max these cells can take and there are much better like the ncr18650ga or the lg mj1. But these batteries are cheap to abuse. On gb 32 batteries can be had for $100 shipped. Sometimes it's cheaper to abuse these cells for a year and toss them and get more. They can't take much more then 100 cycles of actual true abuse anyways. The more they are abused the lower amps they can supply as they age

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    2. Basically in parallel set up the batteries share the load it's still at 4.2 volts but each battery would carry 3.4 amps of the load. You could in theory run it up to 68 amps. That would be the max 10 of these batteries could handle which would be 20c but the batteries won't hold that load more then a few minutes before there done and need a recharge. And constant charge and discharge cycles at a cells max constant discharge severely shortens the life of the cell. If one cell failed early and your drawing max amps it could make another cell fail and vent from excessive heat. Since the other 9 batteries are being drained at past their max loads. I've seen these batteries discharged at 10 amps. And they don't do well at all. 7 amps is the max these cells can take and there are much better like the ncr18650ga or the lg mj1. But these batteries are cheap to abuse. On gb 32 batteries can be had for $100 shipped. Sometimes it's cheaper to abuse these cells for a year and toss them and get more. They can't take much more then 100 cycles of actual true abuse anyways. The more they are abused the lower amps they can supply as they age

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  4. When I connect 10 of these in parallel will I then have 20C?

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    Replies
    1. Yes. But note that at high discharge rates, that are above 0.5C, you do not get the full capacity of 3.4 Ah. At 0.5C rate, you will probably get only 65% of the capacity. If you let the cell relax, you will get some more back. But not 100%. If you discharge at 0.01C, you will get 100% of the rated capacity.

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  5. This comment has been removed by the author.

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  6. These were a great choice for my electric bicycle, 103.6v 60ah = 296+ safe battery use miles. They are awesome. Stay under 20mph :-). They are so lightweight when building a battery pack.

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  7. Building a 60v. 34a battery for my trike.
    Using test tube racks to hold the cells.
    .75" holes .72" cells. Almost perfect.
    Since the battery will be in a 24" metal cube
    on the back I don't have to worry about size.

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    Replies
    1. Sure diy, or go with battery blocks from Shawn McCarthy website green axle.

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    2. That is about 160 cells in a 16S10P configutation. Don't bother with racks. Just glue and tape them together in a rectangular bundle of 16 x 10 cells. Put a thin insulation (vinyl tape) between each rows of 10.

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  8. The NCR 18650B seems to offer me excellent energy density that I require. I wonder is it suitable for offering power in all-electric aircraft? How about its safety?

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    Replies
    1. Safety is most important part when working with 18650 (all li-ion) batteries. Here you can see very good battery safety guide http://www.orbtronic.com/rechargeable-battery-safety

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    2. I believe it is suitable for flying. It is the densest pack, so you get the most range. Do not use Lithium Polymer (LiPo or RC battery) for flying unless it is LiFePo -- that is very dangerous. Have a ballistic parachute. Also in the very remote occasion that one cell may catch fire, can you jettison the pack from air? Safety rules:
      1- never charge above 4.15 volts, and at 4.15 V, do not charge it higher than 50 mA. The lesser current and more time, the more charge you will get. Between 4.2 and 4.15 is about 3% capacity that you will not use. The additional safety is worth the 3% less charge, and also the battery will last a lot longer. 2) use wire fuse for each cell (probably 6A, in case of short). 3) use protection board and balance board (a must, very cheap). 4) use a supply DC to (4.15 x number of cells in series CCVV) charger of good quality (a must - do not go above this voltage). 5) use a reliable AC to DC power supply. 6) let air flow between cells separated at least 5mmm.

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  9. Anonymous1:40 AM

    here: https://na.industrial.panasonic.com/sites/default/pidsa/files/ncr18650b.pdf
    is said that NORMAL CHARGING is 1620mAh = 1,6A !! >>NOT 6,7A<<

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    Replies
    1. Thank you for your comment. When working with li-ion 18650 batteries it is very important to understand basics. In this case understanding difference between "Charging" and "Discharging". You are free to post your questions and concerns when it comes to ncr18650b or any other 18650 battery. I will be happy to help.

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    2. Hi Sal, what kind of wire fuse should be used on this cell for a 2C max e-drive?
      Do you go with 13S or 20S? Which is preferred?
      Where can I find submersible motors and casing and propeller for boats. Power needed is about 10 kW. Thanks

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  10. https://na.industrial.panasonic.com/sites/default/pidsa/files/ncr18650b.pdf .in this pdf the discharge the battery to 2.5 volt .while 3 volt is the normal voltage that the cutoff kicks in .we bought 40 cells in packages off 2S and all of them have a max discharge of 2603 amps .while you give a 3200 amps minimum discharge .discharge is done with 2 amps current

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