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kjs 
Bronze Level
Joined: 24 Jan 2020
Location: NE Nebraska
Points: 47
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 Topic: Dewalt 20v batteries
Posted: 04 Jan 2021 at 9:00am |
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I have 3 dewalt 20v batteries that will not take a charge. Any ideas on how to get them to charge, they are less than 3 years old. Thanks Kurt
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 86137
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Posted: 04 Jan 2021 at 9:04am |
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if they run down FAST, then one of the individual cells inside is bad.. If it does NOTHING, then there is a failure on the CIRCUIT BOARD inside... Probably hard for most of us to FIX that.... The board controls the charge rate, and shuts down the charge when full, etc... Not like the OLD DAYS.
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Like them all, but love the "B"s.
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Ray54
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Joined: 22 Nov 2009
Location: Paso Robles, Ca
Points: 4686
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Posted: 04 Jan 2021 at 11:00am |
If you don't value your life to highly you can watch U tube and see people arcing rechargeable batteries them with a arc welder  and then try it on your batteries. Been some years since I looked so maybe new ways to put yourself at risk out now. 
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Robert Musgrave
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Joined: 11 Sep 2009
Location: SE Wisconsin
Points: 240
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Posted: 04 Jan 2021 at 1:49pm |
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Son sold a boat-load of DeWalt tools since the batteries would fail and replacement was almost more than the tool was worth. Took the money and bought Ridgid with the lifetime battery warranty and is satisfied. R. Musgrave
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24413
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Posted: 04 Jan 2021 at 2:06pm |
WHAT kind of battery ? NiCad or Li Ion ?
Either way ,odds are a single bad cell, which can be removed/replaced. Sad thing is I got a kit(drill/impact/2 batts/chrgr/case CHEAPER than 1.5 batteries.... still have 2 complete kits in the closet here cause I just had to fix the 1st dead battery....
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Sugarmaker
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Joined: 12 Jul 2013
Location: Albion PA
Points: 8436
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Posted: 04 Jan 2021 at 3:22pm |
My Dewalt batteries seem to not be holding a charge as well too. I bought 3 new 5 Amp hour ones last spring. Battery folks got us! Regards, Chris
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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 86137
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Posted: 04 Jan 2021 at 4:28pm |
try aftermarket-- 25 - 30 % the cost..
Edited by steve(ill) - 04 Jan 2021 at 4:28pm
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Like them all, but love the "B"s.
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kjs
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Joined: 24 Jan 2020
Location: NE Nebraska
Points: 47
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Posted: 04 Jan 2021 at 6:53pm |
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I watched a utube video on how to jump start them bat pack. I just jumped the p to p and n to n on a charged battery and then they started to charge. Thanks for the help. Kurt
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24413
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Posted: 04 Jan 2021 at 6:58pm |
hmm.. pay $90 for a real dewalt or $30 for a knock off tough choice....not...... BTW to open most packs, use a dental pick to pop out the round 'buttons' that hide the Torx screws.Takes 20 seconds to do that, 20 minutes to find the 3rd one 'somewhere' on the floor.....don't ask about #4...it's still MIA.
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 86137
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Posted: 04 Jan 2021 at 7:32pm |
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changing out 1 or 2 cells can work if the battery will not HOLD a charge..... if it will not TAKE a charge, then the circuit board is BAD.......... and you are SOL.
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Like them all, but love the "B"s.
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