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Author Topic: Reliable 18650 Li-ion source?  (Read 19609 times)
N3QE
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Posts: 5127




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« on: August 25, 2015, 10:20:31 AM »

Not sure this is the best place for a battery thread, but will ask here anyway, because this is intended as a portable power pack.

Quick perusal of amazon and ebay only turn up cheap crap counterfeit crapola 18650 Li-ion cells.

Is there a reliable US distributor that can sell known name-brand non-counterfeit 18650 Li-ion cells?

Local radio control hobbyist shop has some already-made-up multi-cell packs that are probably good but I'm looking for individual cells for my own pack design.
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K5LXP
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Posts: 5409


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« Reply #1 on: August 27, 2015, 03:28:58 AM »

I'm kind of in the same boat, looking to buy rather than build pack protection modules.  There's this place that seems on the up and up but haven't purchased anything yet:

http://www.batteryspace.com/

They appear to be more than just an internet presence so they're on my list of potential sources.


Mark K5LXP
Albuquerque, NM
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K4JJL
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Posts: 852




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« Reply #2 on: August 27, 2015, 10:40:21 AM »

Try the e-cig vaping shops.  Lots of people use 18650s in the large box mods.  The guys in the store will have lots of first-hand experience with them.
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WA6KYR
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Posts: 23




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« Reply #3 on: August 27, 2015, 11:52:03 AM »

Just to let you know.   I have bought 3 LiFePo4 packs from Batteryspace .com.
They are legitimate.   I have also purchased through Amazon.com at the Biennno store front.   Both places are legitimate as far as my experiences.
73 Richard
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KC2MMI
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Posts: 823




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« Reply #4 on: December 31, 2015, 04:30:30 PM »

Some of the r/c shops might know what they are selling, or at least, that their current supplier hasn't been a problem in some time. There's not much way to know.

From experience, and contact with Ultrafire in China, I can tell you that nearly all "Ultrafire" product sold on Amazon and eBay is counterfeit, and sloppy counterfeit since the voltage and amperage ratings and package color are almost always incorrect in at least one way. In the US, there's also some question that ANY lithium battery of this type may be required to ship via HazMat, which is a real stopper, unless it is installed in a device that it will be used in. Don't ask me, those were the USPS regs last time I checked them.

I've seen ads for what should be good, like genuine Panasonic...but the prices are stunning. I don't like surprise fires and explosions, especially if I'm asleep, and didn't want to bother building an explosion-proof charging box (so to speak) but I suppoe I'd trust Digi-Key or Mouser or Newark as a "genuine" source, regardless of price. Other than that...roll the dice, it really is incredible that no one slaps down the counterfeiters, either.
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KB1GMX
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Posts: 1514




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« Reply #5 on: January 09, 2016, 07:33:43 AM »

I to have used batteryspace for cells and protection boards.

I do not do Ebay.

I made that error once, MACBOOK battery bought cheap and got crap, two cycles and it
failed permanently to 57% capacity likely due to a cell failing.  Now I get to buy again
and this time I'll pay the bucks as the last Apple battery lasted more than 6 years.

Every time I see a battery that cheaper than I thought it should be those that
bought it ended up on sites like this saying not what they expected.

I have bought branded LG 18650 2.8ah tabbed cells through Amazon (about $6.50 ea)
which is the right price.
 
Lion, Lipo4 (etal) tech is one where QA is what your paying for.  I'd add that 18650 and
tend to be better and pouch cells from recognized sources can be very good.  However
pouch cells are also unprotected both electrically and mechanically. 

Allison
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KO4NR
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Posts: 163




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« Reply #6 on: January 10, 2016, 03:12:24 PM »

I buy mine here:
https://www.fasttech.com/

I also salvage Unprotected 18650 cells from Laptop battery packs.  You can get some pretty good batteries this way.  I have found that a lot of the time the Laptop battery pack electronics fail and not the 18650 batteries.  

I use them in parallel connected Protected battery holders and in devices that prevent over discharging, etc., i.e. some Flashlights.
https://www.fasttech.com/search?protected%20battery%20holders

Check these forums:
http://www.candlepowerforums.com/vb/forumdisplay.php?9-Flashlight-Electronics-Batteries-Included
http://budgetlightforum.com/forum/batteries/rechargeable

Don't cheap out when buying a charger!!  

Reviews that are thorough and accurate:  Check out the SkyRC Mc-3000!!
http://www.lygte-info.dk/info/indexBatteriesAndChargers%20UK.html

Bill
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