Geo-TH,In
Well-known Member
It's cold outside and I need something to do. So, I decided to load test my 18v Ni-Mh batteries with a cordless saw and a block of wood. I would see how may inches each battery could cut at a depth of 2.25 inches. All batteries tested came off charger. I wrote on battery with a sharpie the number of inches. Then I used drill, work light and finally shop radio to drain battery to 16.5 volts. The shop radio shuts off at 16.5v which is 1.1v per cell.
Used Dewalt DC9310 charger, an old B&D slow charger and shop radio to charge batteries. Then kept all batteries warm in my battery warmer.
My findings prove that by draining batteries to 16.5v, letting them cool off before charging, does erase their memory and the amount of sawdust they make more than doubles. My worst battery yesterday would only cut 10 inches. Today it went 73 inches. I stopped cutting at 73 inches and measured the volts. All my batteries that made 73 inches had 18v or more.
IMHO this proves that Ni-Mh batteries really do have a memory. I'm sure someone may disagree with my findings.
geo
Used Dewalt DC9310 charger, an old B&D slow charger and shop radio to charge batteries. Then kept all batteries warm in my battery warmer.
My findings prove that by draining batteries to 16.5v, letting them cool off before charging, does erase their memory and the amount of sawdust they make more than doubles. My worst battery yesterday would only cut 10 inches. Today it went 73 inches. I stopped cutting at 73 inches and measured the volts. All my batteries that made 73 inches had 18v or more.
IMHO this proves that Ni-Mh batteries really do have a memory. I'm sure someone may disagree with my findings.
geo