Are there any reputable companies that make li-ion 18650 batteries?
I believe that Samsung makes most of the good cells that people are using for DIY Tesla powerwalls:
http://gcbattery.com/samsung-18650-inr18650-20r-lithium-ion-rechargeable-cell/
I've been using Panasonic with built-in protection circuit and they have worked well for me. However, I do not have any side by side performance comparison data. The ones I'm using are rated at 3400mAH. Amazon: https://www.amazon.com/gp/product/B00NUI47OY
I use these for backup power on my gateways.
Tom
Quote from: stern0m1 on February 07, 2018, 01:52:50 PM
Are there any reputable companies that make li-ion 18650 batteries?
What specs are you looking for? For high capacity and low current draw I like going with the Sanyo GA cells, they're basically a continuation of the Panasonic cell listed above but with 3500 mAH and a 10A rated discharge.
As far as reputable companies, Panasonic, Sanyo, LG, Samsung, and Sony are all big manufacturers that release datasheets that you can trust for their cells.
The website I order from is www.IMRbatteries.com (http://www.imrbatteries.com). They have the best prices on unprotected cells that I've found, however they have next to no protected cells.
The main thing I want is short circuit protection.
Any ideas of "generic" that you know is good?
I am looking for large quantities.
Thanks
Quote from: stern0m1 on February 14, 2018, 11:47:15 AM
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I am looking for large quantities.
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How large? If large enough it may make sense to put the protection circuit on your PCB rather than in the battery.
Tom
Its for a friend, that has a product he sells on amazon. Just some dumb flashlight imported from china, but there where reports of the device smoking etc... I believe its because is is very easy for the user to put the batteries in, in a way that would short circuit them.
Thanks
There are many on AliExpress (whether you trust them or not is up to you, maybe do some testing ;) ), e.g.
https://www.aliexpress.com/item/Liitokala-New-Protected-Original-Rechargeable-battery-18650-NCR18650B-3400mah-with-PCB-3-7V-For-Panasonic-Flashlight/32822459887.html
Mark.
Quote from: perky on February 14, 2018, 07:19:54 PM
There are many on AliExpress (whether you trust them or not is up to you, maybe do some testing ;) ), e.g.
https://www.aliexpress.com/item/Liitokala-New-Protected-Original-Rechargeable-battery-18650-NCR18650B-3400mah-with-PCB-3-7V-For-Panasonic-Flashlight/32822459887.html
FCC certified batteries :o
Quote from: Felix on February 14, 2018, 08:13:30 PM
FCC certified batteries :o
What's an FCC certified battery? Oh, it has a FCC mark on it! :) Also it's supposed to be protected yet there's a warning about not short circuiting them. Maybe that AliExpress idea wasn't one of my best... !
Almost anything chinese is like fake news ;)
I would not trust chinese batteries or anything involving potentially explosive chemistry+electricity, not to give them to someone else at least.