I've heard over the years that there's a way to shock some of these rechargeable type NiCad batteries back into life ? Anybody hear of this or know how to do this ?
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RECHARGEABLE BATTERIES ?
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I have done it but it is a very short term solution. Basically I just connected a power supply with clip leads and touched it to the battery terminals for a second or so.DO NOT LEAVE IT CONNECTED! The sudden current surge blows away any shorts in the battery but it will not restore a battery to like new condition. I have done it in a pinch but they always went bad again after a few weeks.
I was thinking it would be something along those lines ...thanks ! This is a Makita Drill Gun Battery , I suppose I can't really complain , the battery has lasted me over 7 years of good service, just charged it and used it until it was ready for another charge ect. ect. I guess after 7 years I should count my blessings that it lasted me that long.
Nice link Ped , don't think I would want to go through all of that , the more I think about it the more I feel I did pretty good getting 7 years out of that one pack. I took care of both of my packs as one should concerning Nicads , with them acting like they have memories , always running them down completely then charging them full , I've read alot of good internet links on rechargeable batteries.
Hardhead said:
Not if they have developed an internal short which is common. That is what the current surge is for,to blow out the short.If they are shorted internally then they are already completely discharged and will not take a charge.
Do not kill the cells dead. The lowest charge should be 0.6V on a single cell. Discharging them completely is not good for them.
You have to take apart the pack and measure each cell individually. You have to zap ONE cell at a time, and only the ones that need it. They need it when they do not hold a full charge or do not dissipate charge at sufficient rate. There are crystals that build up between the layers and effectively short them out.
What you want is a pack that has balanced cells. When the cells are out of balance (do not hold the same charge), the ones that become depleted first end up acting as resistors in the series circuit and get revers polarized, which is very bad.
If you need to zap a cell, you need a high current. I have used an automotive battery, but a good power supply will work too. Just a very quick tap.
Then charge the cells...yada yada yada...I know your just gonna buy a new pack. Good luck
You have to take apart the pack and measure each cell individually. You have to zap ONE cell at a time, and only the ones that need it. They need it when they do not hold a full charge or do not dissipate charge at sufficient rate. There are crystals that build up between the layers and effectively short them out.
What you want is a pack that has balanced cells. When the cells are out of balance (do not hold the same charge), the ones that become depleted first end up acting as resistors in the series circuit and get revers polarized, which is very bad.
If you need to zap a cell, you need a high current. I have used an automotive battery, but a good power supply will work too. Just a very quick tap.
Then charge the cells...yada yada yada...I know your just gonna buy a new pack. Good luck
C2 said:
Correct. I used the zap method to get me out of a bind.They worked for a week or three but eventually they died and I replaced them.