Question about Makita 2 Bl1830 18v Battery,dc18ra Charger Lxt Fr Drill

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Makita LXT battery charging issues

Do you have any Makita LXT Lithium battery that will not charge, ie, the charger put out red-green flashing lights? Do not attempt to charge further. Because 3 tries will strike out the battery and completely brick the circuit board. I will post how to fix damage cells on my blog http://mkbl1830.blogspot.com/. if you are not so good to manipulate soldering iron, contact me at makitabatteryexpert(at)taropal(dot)com. Thanks for watching!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Battery Issues

When Li-Ion batteries are discharged to a too low voltage (below 2,75 V/cell, in this case 13,75V) the charger will assume that the battery is damaged, and will not charge the battery. First measure the battery voltage with a volt meter, if the voltage is significally below the 13 V the battery are no good. If you have a reading of lets say around 10 V, you can raise the voltage shortly on the battery, by jumping it with a fully charged battery. Connect the "-" poles on each battery. After this, shortly connect the "+" poles, for no more than 5 seconds,disconnect the wires and immediatly put the battery in question in the charger. If it starts charging, every thing if fine. If not, try the process again, you might wanna recheck the voltage if it rises.
Please be aware, that over discharging Li-Ion batteries, will lead to damage of the Li-Ion cells, which results in loss in capacity, therefore, if you are not to use your Li-Ion tools for a while, make sure the batteries are fully charged.

Hope you guys could have sucess with the above

Best regards
Soeren

Posted on Jun 28, 2008

  • 66 Answers

SOURCE: MAKITA LXT BATTERY CHARGER

hey
flashing orange=cooling abnormality.
you need to wait for the battery to cool.

see my mod page, it has all light explanations in it.
Have fun
Avi

Posted on Jan 10, 2009

  • 165 Answers

SOURCE: Brand new Makita DC18RA charger wont charge the batteries.

Return to store for replacement.

Posted on Feb 27, 2010

  • 11 Answers

SOURCE: MAKITA LXT BL1830 18V LITHIUM-ION 3.0AH BATTERY

If the charge count on the batteries is under 300, Makita will replace them. Makita has a known defect in this battery that causes the battery to shut down before it is dead. So as of now they are exchanging ones with low use.

If they are truly defective and makita won't replace, you have to open them, find the dead cell or blown fuse, and replace. Search youtube makita battery for a video on repairing this battery. But once the red and green lights on the charger flash, the the battery can't be charged on a Makita charger -- it's been locked. So use a third party charger.

Posted on Oct 23, 2011

  • 4 Answers

SOURCE: Makita 18v lithium battery when put on charge

This isn't true because I have a second charger and it works fine

Posted on Nov 19, 2011

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