Look interesting but the discharge voltage curve is such that a charge capacity left monitor will pretty obviously not work. Thinking of using in something like the Ectaco Jetbook Lite ebook reader that runs on almost any set of 4 AA batteries. It can use Alkalies, Energizer Ultimate Lithiums or NIMH rechargeable batteries. I am using the Ultimate Lithium batteries currently in mine. This reader is old technology with a monochrome LCD display but is about the only ebook reader ever made that uses AA batteries. Per one report it runs for close to 90 hours on a set of Ultimate Lithium primary cells. Still available new from Ectaco but I got mine for about $42.00 including tax and shipping from a ebay seller, less than half MSRP. Appeared to be a NOS item, apparently from a Texas school district.
Be good too in a clock as the lower voltage of NIMH rechargeable batteries does not work well in many of them per my experience.