Months ago I received my first Riva starter kit form EM. One of the two batts trigger, (led button), flashed on one second, off for 60, perpetually. At first I was somewhat concerned. Emailed the service contact, he offered to replace the batt. I decided to keep the weird acting batt, just thought it unique and a possible conversation piece. That batt, not used frequently, just merrily flashed away repeatedly for months on end. Once a minute every minute perpetually. My habit, when I intend to use a batt, or carry for my spare, is to place it on the charger the night before to insure a fully charged batt. Have no idea how long it would take the led to deplete the batt to cut-off, but it's sat and flashed for months on end. JMHO
EDIT: I expect if the L.E.D. fails. . .the batt wouldn't care one way or the other. (My best guess).
Cheers,
otrpu