I haven't seen any commentary that suggests the price difference between 3100 mah AW/Redilast/Callie Customs is warranted when compared to Panasonic based 18650 3100 mah batts by Eagletac/Intl-Outdoor/Keeppower/Orbtronic.AW batteries are the way to go - as you will see from most commentators here. I also use Redilast 18650-3100 which are remarkably 'even' both when charged and discharged - almost uncanny how all three of them used in my TrustFire X6 discharge to within 0.1 - 0.2v of each other.
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