Dewalt Battery Compatability

[icthruu74]

I have an old Dewalt cordless drill that the batteries died some time ago, and I got to thinking there may be a way to resurrect it. I know I could get new cells and rebuild the old packs, but I wonder if there is anyone out there making lithium batteries that will fit/work. It’s a 14.4 volt, using battery type DW9091. Some quick googling turns up a lot of replacement Ni-cad packs, and a few 18v packs that look similar but I don’t know if they would actually work. Thanks.

 

[Hilltopmasonry]

New batteries and Drills are so cheap now why waste the time especially if you catch them on sale


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[Michael_in_DE]

Here ya go. You're welcome.

https://www.homedepot.com/p/DEWALT-...gclsrc=aw.ds&dclid=CKyX7p3q7N0CFZeOswoderwFQg

 

[WWheeler]

I don't think a 20V lithium to 18V Ni-Cad adapter is going to work in a 14.4V Ni-cad tool.

Best guess I know would be to get a new 14.4 volt battery. There's plenty of them still available both genuine and knock-offs.

https://www.amazon.com/s/ref=nb_sb_...&field-keywords=dewalt+14v+battery&pldnSite=1

If there was a 14V lithium platform then perhaps there would be an adapter made for the older NiCad 14V tools but I don't know of one. The only reason Dewalt was able to have a newer generation lithium battery to older gen nicad tool adapter is because they are the same voltage anyway so it let people transition from one platform to the other (though they should have come out with the adapter much sooner than they did). It also goes worth mentioning that if there was a newer lithium batt platform that could work you would need a new charger for it also. Probably not worth all that especially for a single tool.

 

[PFSard]

I would contact Dewalt.

 

[one9gt]

For the price of the adapter kit that comes with 2 batteries you can get one of the promo drill packs for $20-30 more with 2 lithium compact batteries


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[finn]

Not a 14.4, but I picked up one of the lithium battery adapter kits for my ten year old 18v drill.

It works ok, but, in the end, I still have a heavy old drill that works, but is not as ergonomically friendly as the new drills.

I only use it for backup now, but having the old battery pack rebuilt would do the same, at lower cost.

Clever marketing on Dewalt’s part though, as I ended up buying several bare tools to go with my new lithium battery, along with several additional batteries.

 

[icthruu74]

Well I think you guys have talked me into just getting another drill. With the exception of rebuilding the packs, the price of reviving the old one just isn’t worth it. Plus I'm already invested in Ryobi, it looks like I could get a bare drill for the price of a battery pack for the old one.

 

[winlinmac]

Check out Lowes Clearance specials, I'm serious, sometimes battery packs and brushless drill driver kits go for far less than its competitors

 

[6PTsocket]

What you want to do is do able. Whether you have enough electronics to pull it off is another matter. Your old pack used 12 NiCd sub C size cells at 1.2 volts per cell for a total of 14.4 volts. The almost universal lithium cell is the 18650 which like most lithium batteries is 3.6 volts. With only 4 cells that adds up to 14.4 volts, too, with room to spare in the old battery housing. Those 4 cells will perform better than the NiCd's. Now for the bad news. Lithium batteries have far more stringent charge and discharge requirements. That requires a control board in the battery pack to monitor the individual cells from over charge to prevent fires and cut off the pack from the drill to prevent over discharge that will permantly damage the cells. The control boards are all over ebay, for peanuts.You also need a different charger for lithiums. You will not pull this off unless somebody has the electronics to buy the right stuff and wire it. Rebuild your old packs. Tenergy makes a great 2000mah sub C. Again, that can be an awkward job if you are not an ace with a soldering iron or have access to a battery spot welder. If you can get a pack rebuilt with decent cells, do it or buy a new drill.

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[fourjeepin]

Well I think you guys have talked me into just getting another drill. With the exception of rebuilding the packs, the price of reviving the old one just isn’t worth it. Plus I'm already invested in Ryobi, it looks like I could get a bare drill for the price of a battery pack for the old one.

I would build an adapter to use the Ryobi batteries. It is pretty easy to do, though I would just recommend it as fun project as a new Ryobi drill won’t set you back much coin.

 

[icthruu74]

What you want to do is do able. Whether you have enough electronics to pull it off is another matter. Your old pack used 12 NiCd sub C size cells at 1.2 volts per cell for a total of 14.4 volts. The almost universal lithium cell is the 18650 which like most lithium batteries is 3.6 volts. With only 4 cells that adds up to 14.4 volts, too, with room to spare in the old battery housing. Those 4 cells will perform better than the NiCd's. Now for the bad news. Lithium batteries have far more stringent charge and discharge requirements. That requires a control board in the battery pack to monitor the individual cells from over charge to prevent fires and cut off the pack from the drill to prevent over discharge that will permantly damage the cells. The control boards are all over ebay, for peanuts.You also need a different charger for lithiums. You will not pull this off unless somebody has the electronics to buy the right stuff and wire it. Rebuild your old packs. Tenergy makes a great 2000mah sub C. Again, that can be an awkward job if you are not an ace with a soldering iron or have access to a battery spot welder. If you can get a pack rebuilt with decent cells, do it or buy a new drill.

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I used to be into RC planes, so in a box somewhere I have a lithium balance charger and accessories. I did have a short thought about trying to modify an RC battery pack to the old Dewalt pack, but it’s just more work than I want to do. And frankly with a dozen Ryobi batteries already it just makes sense to stick with the brand.

 

[bubinga]

Check out Lowes Clearance specials, I'm serious, sometimes battery packs and brushless drill driver kits go for far less than its competitors

l got a Bosch 20 v brushless kit for $109.00 @ lowes a while back.
drill & 1/4" impact. 2 batteries & charger .....

 

[bubinga]

What you want to do is do able. Whether you have enough electronics to pull it off is another matter. Your old pack used 12 NiCd sub C size cells at 1.2 volts per cell for a total of 14.4 volts. The almost universal lithium cell is the 18650 which like most lithium batteries is 3.6 volts. With only 4 cells that adds up to 14.4 volts, too, with room to spare in the old battery housing. Those 4 cells will perform better than the NiCd's. Now for the bad news. Lithium batteries have far more stringent charge and discharge requirements. That requires a control board in the battery pack to monitor the individual cells from over charge to prevent fires and cut off the pack from the drill to prevent over discharge that will permantly damage the cells. The control boards are all over ebay, for peanuts.You also need a different charger for lithiums. You will not pull this off unless somebody has the electronics to buy the right stuff and wire it. Rebuild your old packs. Tenergy makes a great 2000mah sub C. Again, that can be an awkward job if you are not an ace with a soldering iron or have access to a battery spot welder. If you can get a pack rebuilt with decent cells, do it or buy a new drill.

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[winlinmac]

I'm glad you got a great deal on that. It seems Lowes is doing a better job with handling clearance items compared to Home Depot.

That Hitachi SDS that we were talking about earlier got sold before I could visit that particular store. I would have been able to send that over to you

Brickseek really helps, I just hope the deals could be contained on this forum rather than spilling over to other forums.

l got a Bosch 20 v brushless kit for $109.00 @ lowes a while back.
drill & 1/4" impact. 2 batteries & charger .....