I just moved into a new (old) farmhouse and found a bunch of corded and cordless power tools of various ages and operability in the barn. One thing I found was a cordless Dewalt DW972 drill with four battery packs and the charger. The drill doesn't work after charging all the batteriesHow would I tell if it's the batteries that are shot, the drill or both, without buying anything? I already own a Ridgid 14V cordless that I love, but it can be a bit heavy with extended use, so the Dewalt would be nice if I can get it to work on the cheap. Thanks.
Easiest and safest:
take the tool and batteries to nearest shop where they sell Dewalt. Ask the guy to let you use their batteries in your tool and vice versa, your batteries in their tool.
DYI procedure:To check batteries:
- if you have some multimeter, try to measure voltage and if possible also amps (but only for a fraction of the second, if battery is good, amperes shoudl jump up very quickly)
- if you have no multimeter, try to find 12V bulb (check spare bulbs for your car), use wire to connect and it should light up.
To check tool:
open it up, take some 12V DC source, put wires on contacts inside the handle where battery connects. Pull the trigger and it should work. you can try to put wires directly to contacts on the motor. Follow cables from the switch to motor.
Juraj
You need an electric test meter tocheck voltage of batterys
Buy a new battery and try to charge it with the charger you have at the moment. The life sparn of the four batteries you have may have expired. Alternatively, find someone around who has similar charger and battery and use that to charger your old batteris and see.
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