![]() ![]() discharge at 2 Amps until you get down to 0.4 volts per cell for the pack above, that comes out to 4.8 volts for the packĬharge again at 3C, discharge again at 10 Amps, but this time, only down to 1 volt per cell/12 volts per pack. discharge at 10 Amps until you get down to 0.6 volts per cell for an 18volt battery, that comes out to 12 cells and a total volatage of 7.2 volts for the pack Memory is essentially the consistent discharge rate and time that the battery experiences.Īfter experimenting with many different charge rates and discharge rates, I have the best results with the following: What that means is if the battery has a 1000mah capacity, you need to be able to charge at 1 amp.Ī constant, high amperage discharge will get rid of the memory the battery had. What you want is to at least 1C charge rate. 600 mah rate), the charge rate is too slow. If you use the standard OEM trickle style charger (i.e. But the same thing will still happen again unless the cells are fully restored. What zapping does, is break up huge chunks of that formation. What happens is you get crystalline formation on the anode, and with enough time, it will no longer pass a current. you only use the battery, slap into the drill, use for five minutes, and back on the charger it goes. The short story to why the batteries die, nicad in particular, is that they get left on the charger at a low charge rate (overcharged), and only periodically used e.g. discharger of some type (light bulb or resistor type discharger) of known amp draw multi-chemistry adjustable amperage peak charger That is near impossible to do unless you have the following tools: ![]() The fix is only temporary because after you "zap" the battery back to life, you need to "exercise" the battery as well. ![]()
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