i have 2 sets (4xAA each set) of white eneloop since 2011 (yes i keep the purchase record), in 2014 i bought another 2 sets because i was afraid the 2011 sets will die soon (as many other different brands (including Energizer and PowerEx that died long time ago) and knock off), i was wrong. the 2011 sets still work until today, and the 2014 sets mostly sit in their packaging from the time they are purchased. only to be taken out when i need all my 4 flashes to work at a time (usually at near year end). they only for camera flashes (Canon) application and about nothing else. i charge them with MAHA POWEREX MH-C801D (soft/slow charge mode mostly if i dont need urgent) about the same age as 2011 sets, and later not long after, i bought MAHA POWEREX MH-C9000 (used in OP) if i need any of them to be reconditioned (and charging if i need more than 2 sets charged at a time). fwiw..