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Yes, for sure, MAH ratings are a joke.
I have searched for "good" AA cells, the best ones are near 20g each, the "worst" 9g; all with optimistic ratings.
Some of the sellers even give the weight per cell in their offer, it makes it pretty easy to choose the "heavy" AA s. Just double check the weight when they arrive, I have sent one batch back as they were clearly under the weight claimed.
I find the Tenergy blue AA cells to be correct and reliable.