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DeWalt lithium ion 18v issues

Hoping someone can help me out here I have 4 x 18v li ion batteries 2 of which are 5 months old & 2 which are 8 months old. When at work the other day one of the batteries ran out so I put it on charge to discover my other 3 were also flat, after charging all 4 batteries until the charge complete light came ON I went to use them to find that they all went flat after about 5 seconds of pressing the trigger on the drill so I then tried these batteries in other cordless tools such as my impact driver with no luck.

I tested each battery with a multimeter and each battery had between 10-11 volts.

I find it hard to believe all 4 batteries would die on the same day so I stuck my multimeter in the charger and although the 'charging' light would not flash the charger was out putting pulses of between .5 - 3.5v DC, is this normal?

Does anyone know a method of pinpointing the problem? Eg battery cell test or charger test?

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Publié: 6 sept. 2018

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I had the same problem! What I was doing wrong was I didn’t push the battery hard and far enough on the charger. When battery is inserted properly you will feel it click into place then the battery will truly charge.

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4 commentaires:

Guy - Thank you from Florida. I read your answer and it works!

22 juil. 2019 par Todd Fener

Yes worked thanks, needs a fair bit of muscle to force the battery onto charger. I am always scared I might break something using that much force!!

16 juil. 2020 par Richard Hornsey

Sometimes you feel so stupid ? thanks for the answer

31 janv. 2021 par maysons

Thank you so much! I knew it had to be something i was doing wrong! Why isn't this made clear in the instructions?!!!

17 août 2021 par Sally Stone