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Old 08-25-2013, 09:46 AM   #16
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How do I test a rechargeable battery?


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Originally Posted by Larryh86GT View Post
If my charger had a blinking pattern that told me the battery was defective I would not have started this thread.

For sure a defective charger can effect the battery. Seeing as my 2 chargers are defective and no longer charge my batteries the batteries are going to stay dead.

As far as testing the battery by simply taking it to a shop I was under the impression this was a DIY forum but I guess I was mistaken. Perhaps it should be renamed. I prefer not to deal with shops if I can avoid it.
a couple fellow's have told you about testing a battery, even me, just measureing the voltage doesnt realy tell you much, the battery say's 24volt now if you measure it it may read 25volt now that doesn't mean that it is better that probly is just a surface charge, now put a load on the battery and it may go down to 23volt or lower which doesn't mean the battery is bad, but you have to be able to measure the battery's with a load on it , that is why it is better to take it to a shop that does this kind of busisness, this doesn't mean that this site has to be renamed ? just leasten to the pro's here that know what they know, i guess if you know you wouldn't be here, listen to what has been said, now that is a diyer with good information no more on this my 2 cents
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Old 08-25-2013, 09:54 AM   #17
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How do I test a rechargeable battery?


That battery back most likely has between 16 to 20 batteries in it....wired in series.

In most cases, when a battery pack goes bad...it's just one or two cells....but because they are in series....it affects the whole battery.

You have to take it apart and measure the individual cells. One problem though...in most cases, the interconnecting tabs on those are spot welded to the battery.

For reference, a freshly charged NiCad battery will have about 1.4 volts on it....once it gets below 1.1 or 1 volt....it's done....really done....time to recharge.

If you measure the voltage while charging....if it does not come back up to about 1.4 volts quickly....then that battery is done.

Yea, there are some hacks where you can zap them with a high current to burn off a short (it's finger short inside the battery can...commonly caused by being left on a charger and/or not being used much). But that is a hit and miss....and typically does not last long.
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Old 08-25-2013, 06:39 PM   #18
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How do I test a rechargeable battery?


the reason i say to just replace the kit is because if your having problems with it now youll be fighting with the tool from now on. no matter what the tool is corded or cordless they never come back from the repair center the same. i spent my early apprenticeship years dealing with that as my tool budget was limited. now i dont bother with that sorta nonsense. time is money. either take it to a shop to get sorted out properly or replace it
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Old 08-26-2013, 06:56 AM   #19
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How do I test a rechargeable battery?


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As far as testing the battery by simply taking it to a shop I was under the impression this was a DIY forum but I guess I was mistaken. Perhaps it should be renamed. I prefer not to deal with shops if I can avoid it.
I suspect the responses you are seeing here is an indication that repairing one of these packs is, simply, not a commonly-performed DIY project. While a voltage check is within the abilities of many, it can be inconclusive. Furthermore, even if you can identify a failed cell, those cells are packed in pretty tights and replacing one in such a way as to be able to pack them back into the original housing can be problemmatic, assuming that you were able to get it open without destroying it. I, for one, don't even try this any more.

Yes, battery tools are expensive. I continue to select corded tools in many cases, for this reason.

BTW...last I checked, ridgid tools at HD still have a lifetime guarantee, including batteries. It was sure nice taking a failed set to the local repair center and walking out two minutes later with a couple of fresh packs.
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Old 08-26-2013, 09:23 AM   #20
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How do I test a rechargeable battery?


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As far as testing the battery by simply taking it to a shop I was under the impression this was a DIY forum but I guess I was mistaken. Perhaps it should be renamed. I prefer not to deal with shops if I can avoid it.
This is DIY....you can DIY the battery to the shop.

As noted above, repairing one of those battery packs requires special tools. Do you have a spot welder? Do you have access to replacement batteries with tabs on them?

When it comes to DIY....one does it for 2 reasons....to save money or they just enjoy it. If your doing it because you enjoy it....then you don't mind spending more than a new pack would cost....after all, it's not about saving money....it's about "I did it"...

In your case....it's obviously to save money. So save some money and buy a new one or take it to a shop.
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Old 08-27-2013, 04:54 PM   #21
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How do I test a rechargeable battery?


I just want to do a test to determine if a battery as a whole is still good as I don't intend to open it up to inspect or attempt to repair the cells inside. This was a simple request on how to test batteries and a couple kind folks have tried to give that information and to those I thank you.

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Old 08-27-2013, 06:42 PM   #22
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How do I test a rechargeable battery?


The point about the spot welder is the KEY to the solution. They're non-trivial devices. They're expensive and pretty much good for just that purpose. So it's a balancing act of 'how many times will you use it' against 'the cost of a whole new pack'. Unless you make a side business out of repairing batteries (which would be problematic to insure due to risks) then it's kinda hard to justify the expense. I'm all for clever tools, but that's a hard one to justify.

Whether or not your generation had any advantages over another is dubious, at best. Least we look to closely at the trash disposal and lack of recycling policies that led to disasters those in later generations are stuck cleaning up...
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Old 08-27-2013, 08:22 PM   #23
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How do I test a rechargeable battery?


I think you guys are right and you have convinced me that it would be too hard to repair the batteries and I have decided not to get a spot welder.
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Old 10-01-2013, 07:56 AM   #24
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How do I test a rechargeable battery?


Batteries conduct current through contact by conductive mat'l from where it's produced to where it is needed. Think about plugging in your TV or lamp. There's only a friction connection conducting 12 or 15 amps and 110V.The current only flows when activated (switched on)Why would you need to solder when there are cells with mechanical connections available. After all no welders were used when wiring your house.
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