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Posted

I' was using the new 12V impact driver and it did something I'm not use to. My 18V just stops when it needs charging. You can pull the trigger and nothing. The 12V slowed down then stopped but repeatedly restarted only each time but would only run at a very slow RPM. It never just stopped like the 18V. It barely had enough power to turn the screws out which were loose enough to do by hand. Are these 12V act different than the 18V Lion batteries meaning they don't just stop but run at a reduced less power speed when they need to be recharged?

Posted

Are they both lithium ion battery packs? Nicad packs you could run down the charge to nothing. Lithium ion batteries wont allow you to do that they need to have a minimum charge so they have cut off when the battery charge gets too low. It's a protection feature on the battery cells.

Posted

Yup there brand new 12V Lion battery slide packs. The impact driver stopped , then started several times. Had very little power but the impact did run with each trigger pull. So your saying it's not suppose to do this.

This is the kit it came in DCK211S2.

Posted

Maybe so but I thought it kind of strange that my 18V Lion batteries just stop to protect them. I had read that this was a feature that DeWalt uses on all their Lion battery powered tools.

  • 1 month later...
Posted

Well I was using the 12V impact driver again today and it started slowing down as if the battery was dying and then stopped. Pulled the trigger and it stated again but wouldn't drive the screws. It did this several times

so I threw it on the charger, grabbed a fresh battery and it drove those screws home. My 18V has never done this, it just stops and will not restart no matter how many times I try it. Maybe it's suppose to do this but I can't see why DeWalt would design the 12V battery protection differently from the 18 or 20V system. What I'd like to know, does this happen to anyone else's 12V?

Posted

Sounds like yours acts just like mine. I think I have enough time to think "Is it slowing down a little?" and it stops, Mine will spin after you remove it from the hole you are drilling or the screw you are driving, but it has no torque.

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