A $5 analog meter is probably pretty accurate but in order to measure the voltage of the tool, you would have to measure it while the tool is running. If you think of running your 120v household appliances on 160v, it would be the same percentage overvoltage.įreshly charged 12v NiCad or 10.8/12v LiIon batteries will measure about 12v either way. 1 batterie compatible 14,4V 4Ah Lithium pour outils Dewalt. You are powering a tool designed for 3 cells with 4 cells. Batterie légère et performante fabriquée avec les meilleurs composants, qualité professionnelle. Running a 10.8v tool on 14.4v sounds a bit much at 34% higher. Running a 12v tool on 14.4v sounds reasonable at 20% higher. So all 12v NiCad tools are running on 12v but all 12v LiIon tools are running on 10.8v. All companies now call their 10.8v LiIon tools 12v. Bosch and Makita changed their labeling to match the others. When Bosch and Makita were the only manufacturers of 3 cell LiIon tools they called them 10.8v tools but then others came out and called them 12v max tools. The newer LiIon tools labeled 12v actually are 10.8v. If I missed something in your question, let me know and I will reply.I'm referring to the tool. These are all DeWalt XR tools, widespread and very reputable (as far as I know).And these voltages are on old, used batteries. My meter is a $5 analog meter, but it's reasonably close. I have told you the actual voltages that I am measuring from charged batteries ( actual 12V and 15V observed).What are you actually asking? It seems like you are asking if they are junk tools. If everything does run well, you might over-draw on the 14V batteries and cause premature failure on those by constantly running them below some desired voltage.How flat is the voltage on the 12V batteries, and what is the comparable voltage range on the 14V battery. So, you might fry some of the internals over time. Driving the electronics outside their ratings.As you state, this will not tell you anything about long term damage. I might expect that you would be more likely to burn out the motor running with a slightly higher voltage. First, I would drill a series of holes into some wood and feel the case to see if I was heating things up. If it were me, and, if I did not mind replacing the drill, I would just do it with a fire extinguisher near by. This puts you directly into the "it might work" category. I have seen different advice stating that a DC motor is likely to accept an input power variance from 10 to 25 percent. My primary reason for responding is to subscribe.
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