Where to get genuine Panasonic 3400mAh 18650?

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vex_zg
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Where to get genuine Panasonic 3400mAh 18650?

There’s a bunch of them out there, but some of the customer reviews yell “fake” or “lower that declared capacity”, is there a reputable shop that’s sure not to be selling fakes?

Thanks.

aoeu
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Haven’t heard any reports of Banggood/Fasttech selling fakes.

chris_n26
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I have procured a few ncr18650b both from fasttech and banggod quite recently. I can confirm that banggood are selling the genuine article as I have removed the wrapper on one cell. As far as I can tell both have very high capacity, however I’m yet to perform any real capacity tests. Cells from both sources have held up well running in my nitecore tm26 on turbo mode. I did however notice based on the date codes that banggood are selling “newer” stock (banggood cells december ’13 and fasttech January ’13). If you want your batteries fast, consider banggood as they use china post airmail, whereas fasttech only have the option of surface mail (go figure).

vex_zg
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Thanks everybody.

just ordered 2 of these from ****** (edit:removed shop name), so 4 cells total.

edit:removed link of purchase because I am in potential dispute regarding wrong battery shipped

I have an imax b8+ so I’ll test discharge them when they arrive.

I need one of them for a handheld screwdriver which can request some 10-15amps in bursts, so I hope the protection can handle it, otherwise I’ll have to put few of protection board in parallel.

chris_n26
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The gold plated variant seems new to me, perhaps you will be the first to review them? However typically protected circuits for ncr18650b cuts off around 7amps. If you really did need such high currents, perhaps unprotected cells would be a better option?

vex_zg
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I need overdischarge protection so I don’t ruin the cells.

It should be possible to put a few protection circuits in parallel, right? Perhaps they need to be identical though, so that the current is divided equally between them.

chris_n26
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Yeah I guess over discharge can be a big problem. Have you considered unprotected cells, but also adding a protected circuit to the device? This way I think is easier as you can adjust the high current threshold.

vex_zg
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Yes I have but they were too expensive for higher current circuits.

Another option perhaps is to increase the number of FETs, harvest them from a few cheap battery protection circuits and add them to one protective circuit

totilde
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You better buy other cells. Panasonic 3400 are not high drain cells, they were designed to provide the maximum capacity, not max amps. You don’t want to ruin your cells, so you buy protected ones to avoid over discharge, but then you want to trick it to let it discharge at higher amps… That doesn’t make sense to me

Mooooooo

dangerous
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Ncr18650b are not designed for 15A pulses. I suggest VTC5.

BLF

xmint
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I agree with the others the NCRBs are not the way to go IMV even if the protection circuits allowed it the 15A bursts would not be good for the Bs

Go with high drain cells and charge them when the s’driver starts slowing/grunting.

The views in this post are mine, they are views and beliefs only, and not to be taken as facts.

chris_n26
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I would have to agree with you guys, however I thought the OP wanted something that would hold up under 15A bursts? I’m sure the NCR18650B’s can handle 7a bursts (anyone have data on this?). Now what might be important to know is what are the typical current the device will be drawing. I would hardly think an electric screwdriver would draw that high currents continuously.

vex_zg
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I’ve got plenty of high drain liPos since I also do RC flying, but aren’t NCR18650B’s tested above 10 amps and favored by e-cig folks? I’m also pretty sure they can do more than 7A bursts, perhaps not their protective circuits.

For accu screwdriver I need only over discharge protection, I don’t need overcurrent protection. If it turns out to be too complicated, I’ll just run them without protection and look for torque reduction as end of charge signal.

I’ll do a review and high current test when they arrive.

edit: yup, I got something mixed up, in my head. They are not recommended for 10A currents.

chris_n26
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I’ve handled mostly lithium polymers for my r/c hobby. Now lithium polymers don’t come with protected circuits so a common solution to over discharge would be to include a device that gives a live voltage, that way you know when to recharge. For example, http://www.ebay.com.au/itm/RC-helicopter-Lipo-battery-AKKU-portable-Voltage-meter-Tester-alarm-2-6S-AOK-/141151350792?pt=AU_B_I_Electrical_Test_Equipment&hash=item20dd46b008

I don’t quite see how to modify the above linked device for 1 cell, you need 2 more or in series to use that device. Now I’m guessing it wouldn’t be too hard to adopt this idea for these cylindrical cells. Perhaps this would be another option, that way you don’t have to mess with protected cells.

vex_zg
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I got plenty of those voltmeters and low voltage notification thingies from hobbyking, with light and/or sound, and voltmeter readings, but I wanted more of a fully automated disconnect circuit that would simply stop supplying current when input voltage is below 3V.

edit: to have sort of a conclusion for reference, this seems like a very good high drain battery, up to 30A

http://www.orbtronic.com/batteries-chargers/high-drain-18650-2900mah-ncr...

based on panasonic NCR18650PF

totilde
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that’s a much better option for your needs, take a look at mountain electronics to see more options, if you like

Mooooooo

vex_zg
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mountain electonics has a nice selection of higher quality cells, prices are decent too, but seems there are no options to delivery in EU, US only.

totilde
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yes, sorry, i forgot to check your location…. are you interested of getting them from china, or you need them sooner than 1,5 months?

Mooooooo

vex_zg
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I don’t “need” them at all, I want them Smile it’s a hobby. It would be simpler and probably cheaper if I just bought a new Bosch screwdriver Smile

So – no, I don’t need to have them urgently, I can wait for china delivery.

Any suggestions where to get genuine ncr18650pf /based/ cells?

totilde
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it’s not an easy task to find high drain protected cells with a circuit capable if providing more than 7 amps without tripping
if you really need protected and need that current, I can’t tell you any cell other than that one you linked, maybe other have an idea, i don’t, sorry

Mooooooo

vex_zg
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I think you misunderstood – I’d like to buy unprotected or protected NCR18650PF based cells, if they’re protected I can remove the protection if it will be tripping.

I’m only asking where to buy genuine NCR18650PF cells.

totilde
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sorry again. you can find them in fast tech, but shipping will be slow
11,47$ for a pair after BLF coupon

Mooooooo

Ricflair
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http://www.bgmicro.com/ur18650f-2000mah-rechargeable-lithium-ion-by-sany...

I have ordered a few batches, and they are solid! Most of my gear is loaded with them and they have been working well for months.

If you have a Saltytri you want to unload, hit me up. If you don’t know what that is, google it.

vex_zg
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Nice price, 10 cells are $17.5, but the shipping is also additional $17 for me (Sweden). Have you had a chance to test their capacity? i can’t find a review of those cells, only 2600mAh version comes up. Perhaps these are old 2600 cells which lost their capacity so they are now being sold as 2000mAh ? Smile

Ricflair
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I have not tested them. They look identical to the laptop pulls I have found in the past. I forgot to test the voltage on the last batch I bought. If I recall my first batch they were around 3.8 volts when I got them (that depends on the meter you use too, lol). I can say that they took about a hour or so to fully charge up on the I4.

If you have a Saltytri you want to unload, hit me up. If you don’t know what that is, google it.

StorminMatt
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dangerous wrote:
Ncr18650b are not designed for 15A pulses. I suggest VTC5.

If all you’re interested in are 15A pulses, the Panasonic NCR18650BD might be a better choice. Maximum current may not be as high as the VTC5 – only 10A maximum continuous and 15A pulse (enough for your needs). But with 3200mAH, capacity is quite a bit higher – almost as high as the NCR18650B.

Without lamps, there’d be no light.

vex_zg
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Ordered 2 pc of NCR18650PF 2900mAh from Fasttech. Should arrive by Christmas Smile

StorminMatt
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vex_zg wrote:
Ordered 2 pc of NCR18650PF 2900mAh from Fasttech. Should arrive by Christmas Smile

Or maybe Easter?

Without lamps, there’d be no light.

my9221
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[quote=totilde]that’s a much better option for your needs, take a look at mountain electronics to see more options, if you like[/quote
Just bought 6 panasonic 18650 3400mah protected from them.

my9221
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Ricflair-Are you a wrestler?

hemimike
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C’mon now, Fasttech isn’t that bad for shipping, and after all its free. Wink I have never ordered batteries from them though.

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