I was using them for several months and switched back to alkalines.
At first their capacity was high, giving me more than a week of Ogoing.
But after 7-10 cycles it dropped significantly. I measuered them with
"Battery watcher" program by Marcus Goeber and now they give less
then an hour of on-time with no SRAM card and no serial activity.
I think that the high current which Ogo demands kills them too soon.
Anyway, I now use alkalines. I am much more satisfied with them and I
use AccuCell charger to recharge each set of alkalines once. Charger is
too expensive for just this purpose though.
-- Best regards, Juraj <Juraj Mucko> emporion@zg.tel.hr