I have a 14.4V drill battery that will not charge. Battery is lithium (model 1434)) and charger is a DC1411. Red light on charger comes on when battery is inserted and may stay on for 10 minutes to an hour before switching to green light, indicating charged. Battery, however, is not charged. No malfunction lights on charger ever come on. Bad battery or bad charger? What should voltage be on positive and negative contacts in charger? Thanks, Neal Locke
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There is no such thing as a memory system in your battery. If you charge the battery until the green light on the charger comes on, that is as much as the battery can/will safely charge to. With Lithium batteries, they will fully charge whether they are at 75%, 50% or 10% capacity when placed on the charger and discharge to 0% if you use them that long. If you need the battery before the green light comes on and you use it, it will still fully charge when replaced on the charger. All batteries do discharge at different rates. Most not noticeably but a few will discharge fast enought to be noticable. If it affects your usage of the tool, you may want to exchange it or get it replaced under warranty because it will only get worse with age.
The pcb inside the battery has a microcontroller that monitor the
charges and charge cycle. When the cell falls below a certain voltage,
it will instruct the charger not to charge and will show with a
red-green flashing light. If the battery has been tried 3 times in
succession then the pcb will brick itself from the makita charger. So
first replace the bad cells. There are 2 solutions at this moment:
charge with a 3rd party lithium charger like the imax b6 or replace the
pcb with a working one. check out my blog on
I would not say they are not defected, but I think they are not getting fully charged. I have the same problem with my battery once I have used it all day and the red light comes on from the fuel gauge. I have the P104 battery. I would return your charger and try to charge them on the new one first. If you have the same trouble, then return the batteries for new ones.
This is not right. They should last much longer then that. I have one of the more expensive 18V lithium batteries (the one with the button on it that tells you if it needs charging or not) and I can use mine almost all day before it needs to be recharged. I do construction work and I use my Ryobi products almost all day. Either both batteries are bad (I don't believe that is the case) or the charger is not charging them all the way to a full charge. With this charger, you do need to make sure that you remove the batteries as soon as the green light comes on. It is not good on these batteries to stay charging after they are fully charged. You also should not leave the charger plugged in without any batteries charging.Please tell me more about the charger. When you plug in the charger, does the red light come on? When you plug in a battery, does the red light stay bright and the green light blink? Does the red light go off and the green light stay on bright when you remove it from the charger? If the charger is not working correctly, then return it for a new one.