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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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discharging nicad batteries???
I have some 9.6v nicad batteries for a cordless drill.
What is the best way to completely discharge these before recharging?(I use a 12v tail light bulb for some 12v nicads but don't think that would work in this case.) I've seen a home brew box used to rapidly discharge badly formed nicads thereby restoring them to some usable state. Anyone know what it'd take to build one of these, or where I might purchase one? Thanks in advance for any assist. |
#2
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discharging nicad batteries???
gothika wrote:
I have some 9.6v nicad batteries for a cordless drill. What is the best way to completely discharge these before recharging?(I use a 12v tail light bulb for some 12v nicads but don't think that would work in this case.) I think it would. I've seen a home brew box used to rapidly discharge badly formed nicads thereby restoring them to some usable state. Anyone know what it'd take to build one of these, or where I might purchase one? Thanks in advance for any assist. |
#3
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discharging nicad batteries???
CJT writes:
gothika wrote: I have some 9.6v nicad batteries for a cordless drill. What is the best way to completely discharge these before recharging?(I use a 12v tail light bulb for some 12v nicads but don't think that would work in this case.) I think it would. If you completely discharge the entire pack, it will probably be damaged and unusable since some cells will have been reverse charged in the process. --- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html Important: The email address in this message header may no longer work. To contact me, please use the Feedback Form at repairfaq.org. Thanks. |
#4
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discharging nicad batteries???
Use the 12 volt lamps. They will be of adequate load. You do not want
to overload the batteries as well. Never discharge NiCads fully. They can be put down to about 40% below nominal, to have a proper discharge. If you fully discharge them, they can also be damaged. I use my drill to do the job. I turn the drill on in the lock position, and leave it sit until it just about stops. Then I charge the battery pack. NiCad batteries will last about 2 to 3 years average, if used moderate to light. They will last even less with a lot of heavy use. It is a combination of age and charge cycles that wear them out. As they age, they also degrade in their chemical makeup. There is no way out. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "gothika" wrote in message ... I have some 9.6v nicad batteries for a cordless drill. What is the best way to completely discharge these before recharging?(I use a 12v tail light bulb for some 12v nicads but don't think that would work in this case.) I've seen a home brew box used to rapidly discharge badly formed nicads thereby restoring them to some usable state. Anyone know what it'd take to build one of these, or where I might purchase one? Thanks in advance for any assist. |
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