I dont know, but If you keep the bill with the date of purchase it should be fine.
And I am sure the flashlight will be OK for many years.
I use a LC40 for many years now, never any problems.
Anker LC90 Flashlight Extra battery?
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You don’t need to register your product for the warranty as you might do for other companies. Just keep a PDF of your Amazon invoice and a picture of the serial number on your product (if it has one; not every Anker product does) as you’ll need to provide them if you request warranty service in the future.
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I Got Anker Flashlight LC90 From amazon.com SELLER: Anker Direct, I recycled Box, It will be problem?
I dont think so.
But always better to keep boxes, though I got a real pile of boxes meanwhile! 
Might as well just get another flashlight
Guys When I use it contiunously for example 10-15 min, it getting hotter, As manuals says It can work 6 hours on medium level, So will it catch fire melt or something if it will be used for 6 hours? Thanks!
want to add 2nd LC90 it there any deal guys?
None that I know of, keep an eye on Amazon, maybe they have it on sale soon
yes I check Amazon everyday.
my first LC90 got for 22.99$ hope there will be deal again.
Same Price In US but in Dollars.
29.99$ ,
yeah I wait.
Maybe @anker can please give me discount code on Lc90 on amazon 
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Best of luck 
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You can check the Amazon link on camel camel camel and it will show historic pricing… maybe will help future predictions on pricing…
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I know what website, Checking…
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The price of lithium cells has increased partly because the standard is moving from 18650 to 21700 and electric cars. Vaping is soaking up most 18650 capacity.
I’d not expect past 18650 prices to be repeated soon.
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Guys When LC 90 is fully charged does that red dot became Green? Or how Do I know when its already fully charged?
I can tell you from my LC40 if its fully charged the light changes from red to white so far I remember
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Just red became GREEN light, It finished charging.
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