Question about Makita Tools & Hardware - Others
18.4 lithium cordless drill
Posted by Anonymous on
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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
Posted on Jun 28, 2008
SOURCE: Battery charger light flash
Its pretty simple to fix. The lithium battery has just depolarized. Just buy a 9V battery.... put them end to end... the 9V and the lithium and touch the metal parts of them. hold for 20 seconds... if it doesn't work, lick the 9V to conduct the electricity better.. hold for 20 seconds and put directly on the charger... I just did this, and it is charging as we speak! good luck!
Posted on Feb 18, 2009
I have the same problem. The guys at Batterries Plus told me that 7.2 volt battereis are not easily replaced and definately not through them. If you left it charging for to long (ie over a week when you were gone like me) then the battery is never gonna charge again. You might as well find the same model of dril at skil's reconditioned site for around $40 or buy a brand new one for $60 or $70
Posted on May 09, 2009
You are the thrid person in the last couple of days with this same problem and i check who was posting the problems all differant people all RYOBI 18V lithium-ion batterys and they all got them for christmas. SOMETHING is not right there is now warranty on the batterys but there is one on faulty workmenship there must be a problem with this type of battery good luck
Posted on Jan 16, 2011
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