Thinking about getting a mh-c9000 to go with the 808 we already have. Have quite a few D cells, and most are getting close to 3 years old. Figured I'd just use a jumper for them with the c9000. Are there other better option? I do not need another charger, i only want the analyzer part. Have not noticed a drop in performance yet, but from what I understand, they are getting up there in age for a nimh.