How to revive makita drill batteries

Written by alexander callos
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Makita power tools are one of the leading brands in the industry today. They produce not only drills, but saws, sanders and many other types of power equipment. Makita drills come in many different styles and options, but all of them have a battery that attaches to the bottom of the drill. When the battery dies, it is necessary to recharge it, but eventually the battery will break down completely and recharging will not be an option. Reviving Makita drill batteries is a job experienced tool owners can try to tackle to save a few bucks.

Skill level:

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Things you need

  • Multi-meter
  • Mig welder
  • Makita battery
  • Makita battery charger
  • Makita drill

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  1. 1

    Set the dead battery on a table with a flat surface and put the multimeter next to it. Connect the two prongs of the multimeter to the battery to test the voltage of the Makita battery and determine how dead it really is.

  2. 2

    Test the voltage of the mig welder to make sure it will work for the Makita 18- or 12-volt battery. Connect the prongs of the multimeter to those of the mig welder and turn it on. Check the reading on the multimeter to make sure it is in the necessary range for the Makita battery.

  3. 3

    Attach the prong from the mig welder to the top of the battery and turn it on high. Poke the battery with the other prong on the mig welder to spark it. Touch the prong of the mig welder to the battery until a spark is detected.

  4. 4

    Put the battery in the drill and check to see if it is working better. Plug in the charger and set the battery on the charger for a few hours to determine if it can regain its charge and has been revived.

  5. 5

    Insert the battery back into the drill and turn it on to make sure it is back up to full speed. Remove the battery again and test the voltage by connecting the battery to the prongs on the multimeter and reading the voltage of the battery.

Tips and warnings

  • The expected voltage of the Makita battery is usually 18 or 12 volts depending on the type of drill.

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