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There is a company called Thompson who sells batteries, chargers and battery testers. After charging you can place a battery (or cell) on the tester where a load is applied to it and it will register in a red, yellow or green region. If you buy new you may want to invest in NiMH batteries that retain a charge longer while stored and don't have some of the drawbacks of NiCd. Thompson carries a microprocessor controlled Maha charger that will inform you as to the condition of individual batteries (or cells) while they charge. Conditioning may be inproved as well. Regards, Tom Spencer (firstname.lastname@example.org) http://web2pt0.wikispaces.com http://members.whro.net/~tspencer Good, Fast, Cheap (pick two) Vos adepto quis vos persolvo pro Pre-Engineering Academy Instructor, Grassfield HS Consultant to WHRO - CII and National PBS Teacherline Facilitator National Energy Education Development Project (NEED) Facilitator --- Edtech Archives, posting guidelines and other information are at: http://www.h-net.msu.edu/~edweb Please include your name, email address, and school or professional affiliation in each posting. To unsubscribe send the following command to: LISTSERV@H-NET.MSU.EDU SIGNOFF EDTECH