Question about Hitachi 12v 3/8" Driver Drill Kit with Flashlight DS12DVF3

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Drill Batteries won't stay charged for more than 15 minutes

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1 Answer

1. Your batteries may be too old
2. Some of your batteries cells are bad
3. The charger may not be producing full output

Try dis-assembly and check each cell individually-Bad cells can be replaced at a fraction of cost of battery replacement.

Posted on May 23, 2008

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Posted on Jan 02, 2017

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Rechargeable batteries do have a lifespan, they won't recharge forever. If you have fully discharged the batteries then fully recharged them and they still don't have full power or they only last a couple minutes then they are done. If they won't charge or the charger shows them as defective, the only fix is to replace them.

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My dewalt 18v xrp battery wont take a charge


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The battery will no longer take a charge. Time for a new one. I had 2 like this in the last month. The batteries where 5 years old and been charge for over 800 cycles each. Age and cycles will wear them out.

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I used my makita 18v 1/2" cordless drill then charged it and put it away. When I tried to use it again a month later there was no power. I tried to recharge the battery but red light would only stay on...


WOW! Count yourself very lucky. Most batteries don't last half that time. The newer battery probably has a lower amp hour rating than the first one. When replacing the battery (and you must replace it) look for the one with the HIGHEST amp hours - which is usually written on the battery or packaging. You can also ask at a Batteries Plus store if they can re-build the original battery for you- since the unit is so old, and Makita might not make replacements for your drill. You could rebuild the battery yourself,it is only 12 AA or C batteries wired together, but ni-cads can be dangerous when soldering and can explode if you slip up. Best bet is to get a new or rebuilt battery.

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Both green and yellow light stay on and batteries will not charge 18v


If both yellow and green LEDs come on, this indicates
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Allow the battery pack to remain in the charger for 15
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red LED does not come on after 30 minutes, this may
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n After normal usage, a minimum of 1 hour of charging time
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Solution is two fold. Will try the freeze and re charge approach today and do this a few times. The long term soluiton is to purchase two Lithium batteries and a duel chemical charger. Expensive solution but seems it will work.

Jan 16, 2009 | Ryobi 3-piece 18V Drill / Circular Saw /...

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Charger not charging


Just was on a website for Ryobi drills and it states that if the yellow and green light stay on for more than 15 minutes the battery is fried. Couldn't find the link but if you do a search for Ryobi Drill 18 volt you should find the same info. It was as product review from Australia I think.

I also have a problem with the charging of Ryobi batterys. They seem to charge AOK with the green light coming on but the charge does not last at all. Not sure if the problem is with the batteries on the charger.

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