Makita applies the latest innovation to engineer and manufacture the best power tools in the world. Makita Power Tools have more power and less weight, and are more compact and more efficient than any other. At jobsites around the world, professional users are dumping the old, getting the new and gearing-up with Makita. Makita manufactures best-in-class industrial power tools for the Aussie professional users.
There are two reasons could have caused the Makita PA14 power tool battery chip problem as below.
One is that the temperature or cutoff or individual cell monitoring sensor in original battery charger that dont allow the batteries to take a charge. Once the same condition is detected 3 times by the same battery charger it considers the batteries to be bad and refuses to accept it.It is a protection chip to prevent Makita cordless drill battery melt down.
Another is that the chip in the battery pack if drained dead or sits to long will brick the battery permanently making it unusable.
Problem is there is a lot of these Makita power tool batteries going to the landfill that are perfectly fine and just need the chip reset.
Frist, testing the Makita 1220 power tool battery cells, If one of the cells has gone to zero, the cell will need to be replaced before any further repair can be done. You may have several batteries with a faulty cell.
Once you found that the internal chip protection board has been the cause of the problem, like the fusible link being blown, a faulty internal chip etc.
