IKELITE li-ion charging issues in Lights, Strobes, and Lighting Technique Posted December 11, 2015 Yup - having some real issues with these Li-Ion batteries (2nd Gen), just had one purchased last year, working fine until a month or so ago until battery would strangely charge for just 15 mins - showing nearly a full charge but within 10 TTL activations died. Unfortunately out of warranty when problem arose. Now my 2nd Batt is showing signs of pending failure. Dies at the end of a 2nd dive (both dives about 1hr with about 50 TTL flash activations). Battery is now out of warranty also. This is despite adhering to the manufacturers guidelines. Now thinking of returning to NiMH !