Take caution when ordering from some suppliers. This is what I found.
NAHLER
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Return Policy <LI class=termbody>
There are no returns or refunds accepted once payment has been completed. There is only a 14 day warranty on all warrantied parts from the time of order being placed.There is no warranty on atomizers. All warranty parts must be returned to NHaler before a new replacement will be shipped. If you experience faults with your product after the 14 day warranty has expired, please contact NHaler directly to assess the situation and discuss a reasonable solution.
TOTALLY WICKED USA
Guarantee
We normally offer a 28 day warranty on the our Electric Cigarette atomizing units. However on our Multi-Packs each atomizer works out at less than $8 Each . Therefore we offer no warranty on this item. The atomizers though are exactly the same as the single units we sell.
Many users of Electronic Cigarettes also purchase 'spare' Atomizers and
batteries prior to completing their purchases at Checkout.
Totally Wicked USA
IKENVAPE-
14 day warranty on all atomizer. He does not wait for return of the defective atomizers but goes ahead and mails them to you.
Just be careful of those suppliers that do not offer warranties or return of products.
A majority does offer warranties on atomizers. These are the ones you need to be ordering from.
I think Totally Wicked has the longest warranty on atomizers. I know they are high but it may well be worth it with their warranty.
A company is only as good as the products they back (if they don't offer any warranty or returns they don't back their products)