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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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Best Method to Slow Charge NiMH Batteries
On Sun, 23 Dec 2012 16:53:34 -0500, in sci.electronics.repair you wrote:
Hi, Since I created a NiMH battery pack using recently bought NiMH "C" batteries, I am in search of knowledge for the best way to slow charge these 1500 MAH "C" cells in series. I prefer using a timer and a constant current charger (I made) that supplies a constant 150MA. There is a lot of information on the web, but one site says one thing, and another says something else. www.batteryprice.com/batterycareguide.aspx provided the kind of information I was looking for: (Battery Capacity in MHA/Charge Rate) X 1.4 = Time to charge (slow charge). Note: Batteries "fully discharged" to 1V each cell. In my case, 1500/150 = 10 X 1.4 = 14 hours. This seems logical to me, but I wonder if anyone sees a flaw. How about getting back to the original subject, "Best Method to Slow Charge..." Here is additional information that seems to support that formula: I just bought a pair of 2500 MHA NiMH "C" cells that state on the package, "Recharge in just 2.5 hours with 1250 mAh rapid charger or 15 hours with a 250 mAh standard charger". Note: There was no charging information on the 1500 MHA NiMH "C" cells I used in my battery pack project. The 1500mAh is a different brand than the 2500mAh. John |
#2
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Best Method to Slow Charge NiMH Batteries
How about getting back to the original subject,
"Best Method to Slow Charge..." If you believe most of what the manufacturers say, there is no "best" slow-charging method. Slow charging is deprecated. |
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