Yes mah is battery life. But note - some Riva 510's (the latest Riva 510 kits made by Eastmall and all Riva 510 SE kits made by Eastmall) are 3.7v. Older Riva 510's and ones not made by Eastmall are less than 3.7v. I know all of the normal Riva 510 kits and the Riva 510 SE kits and Riva SE loose batteries (including the new ones with 3-click enable/disable) at Liberty-Flights.com are new Eastmall stock and 3.7v. Any other loose batteries may or may not be new 3.7v stock.
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