I have 48 AA Sanyo Eneloop batteries constantly never disappointing when in use and the device has me. It is a true workhorse and the same show charge 12 AA batteries is just perfect for my needs. Also the charging current from 700mA for the AA's is a good compromise; fast enough for everyday work and yet gentle enough for the batteries.
Can the device must provide each know of many batteries.
I want to reiterate that I have no problems with the Eneloop batteries, unlike the previous speaker here.