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

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Drill battery charger doesn't work

I have a new Hitachi portable drill that employs a lithium ion battery. The drill works fine, but the charger, that I have only used once with no trouble, no longer works. The red light went on went I plugged it in, and it stayed on, as it should of, when I put in the battery, but then soon mysteriously went off. There doesn't seem to be any power getting to the charger. I, of course, checked the outlet, in order to see if that were where the problem lay, but the outlet works fine with other electronic items. I also tried plugging the charger into a different outlet, but that too had no positive effect. Any advice that you might offer me regarding what might be wrong here, and how I might fix it, would be greatly appreciated.

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  • Anonymous Feb 14, 2009

    i have pulled my charger apart and have tested the fuse and the wires to the charger all seem to be ok also i have inspected the circuit board and tere doesnt seem to be any burn marks on it

  • ddraig Feb 14, 2009

    I have the same problem, with my 18vdrill modle number DV 18DL. The light comes on the charger, you put your battery in and the charger stops working. I have taken the charger apart.the fuse is fine,there are no scorch marks on the board, the transformer or any thing else.Seems to be a common fault. can anyone(some from hitachi would be nice) help.

  • Sondra Winters
    Sondra Winters Oct 25, 2016

    Harvey's answer is right on the money if your battery has discharged too far. If you don't know AC from DC electricity and understand what he means about polarity, find a friend who does or risk shocking yourself or blowing up the battery.

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Hi Firemedic13; Most chargers like yours have a fuse inside them. Remove the screws that hold the charger together. The fuse will be on the low voltage side of the transformer. Un-solder and replace it with one of the same value. If the charger is not held together with screws (doubtfull) you will have to carefully cut along the seam where they were glued together. A dremmel tool works good for this. After repairing use some ABS pipe glue to re-seal them together. If the fuse is not blown then the unit will require testing by someone that is proficient with a multimeter. Most times it is the transformer that has fried a wire. If the sides of the transformer have any burnt spots on it then it will be the culprit. Hope this has helped. Best regards; HELP2DIY Please dont forget to rate my answer.

Posted on Jul 10, 2007

  • brid_plumber Jun 27, 2011

    on the hv side of the transformer there is a thermal cut out fuse, get a replacement one from maplin or rs replace this and all should work again fine

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If you store the battery for extended periods (i.e. months), it spontaneously self-discharges. If the voltage of the overall pack drops too much, its electronics places the pack in "safe" mode and will not allow a charge. Try opening the battery pack and use a voltmeter to verify polarity. Then use a car battery charger (or another 12-18V battery) to charge the battery for 5-10 mins, bypassing the electronic charge regulation circuit. This should raise the battery pack voltage above the "safe" threshhold. Do NOT OVERCHARGE--limit this bypass charge to a few minutes. Then reassemble the battery pack and use the regular ("regulated") charger.

Posted on Jun 15, 2013

  • Sondra Winters
    Sondra Winters Oct 25, 2016

    Awesome advice, this worked great! 5 minutes was more than enough on an 18V charger. Thank you Harvey!

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I need a charger for a 12v battery pack Model# 2CBOO-MCB for a MasterCraft Cordless Drill Driver. Where can you purchase this part?

Posted on Jan 22, 2009

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Quick Charger 2.0 2port QC2.0+4port USB Charger 5V 9V 12V 60W USB Fast Charger for Mobile Phone Chornic Quick Charger 2 0 2port QC2 0 4port USB Charger 5V 9V 12V 60W USB...

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I know Hitachi has for dealers a special service if there are some machines have long been in the warehouse and there happens to someone so one machine can be that the battery is no longer accepted in the charger, but the cells are certainly not degenerate because they get to Hitachi special boost with a Cadex charger to the deep discharge protection voltage returns to work up through a special circuit, often they are not li ion cell problems but quickly decline of some species li ion batteries, the 10.8-volt consumed quickly has little cell capacity and that is why I know , the service is free of charge at Hitachi for dealers.Take utmost Li-ion batteries in the charger, including batteries with more capacity swap them round and round off as the cells remain active, the greater Li ion batteries have a special circuit which is designed with a lot of information charging cycles the cells and much more even purchase date and the corresponding machine number codes contained in it, even when the loose batteries purchased betreffend.Li-ion is significantly better at capacity, but the strength and warmth and the tool motor that often suffers holding it usually shorter than the BatterySometimes people think that the battery has no power, but it turns out that the engine of both Panasonic and Milwaukee in 80% of cases the complaint.The engines have significantly less power and make a screeching noise and consume quickly caarbon brushes and if replace a armature its most not expensive but then better do that then buy new batteries.

Posted on May 12, 2016

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Just find a plug with the same voltage output and splice it in

Posted on Feb 16, 2010

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What changes are required for a battery charger for Hitachi drill (lithium ion battery) designed for 110 v ac input to be on 230 volt ac input. Switched power supply.

Posted on Jan 20, 2010

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Where do I get a 18V battery charger for a workforce drill?

Russ

Posted on Jun 09, 2010

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