Replacement Batteries for Cordless Drills

barry richardson

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So we had the new "generic" DeWalt replacements for over 2 weeks. Last week I charged them and put them away. Hadn't used them all week (5 or 6 days). Yesterday, get them out to use the 18v skilsaw to cut up some smaller branches that came down since Christmas. My wife was so excited that she was able to make 3 or 4 passes with each battery before they were dead.

So, I'd say that the NiCad generic 3.8 Ahr for sure do not hold a charge. Fresh off the charger they are fine but do not last as long as actual DeWalt batteries, guessing a third less run time.

So got a FARMER math question: Since the 3.8 Ahr generic runs like a 2.2 Ahr DeWalt would the 4 Ahr generic run close to the 3 Ahr DeWalt?

Similar but different question: I see they offer a 5 Ahr lithium generic battery that looks just like a Nicad 18V in shape and size. Lithium hold storage charge better than Nicad. DeWalt charger is good for both Lithium and Nicad. Do you think the 5 Ahr generic lithium would likely match up with a 3 Ahr lithium from DeWalt?

The 5 Ahr lithium has a battery gauge on it like some of the other higher volt DeWalts. I kind of like that option...
So we had the new "generic" DeWalt replacements for over 2 weeks. Last week I charged them and put them away. Hadn't used them all week (5 or 6 days). Yesterday, get them out to use the 18v skilsaw to cut up some smaller branches that came down since Christmas. My wife was so excited that she was able to make 3 or 4 passes with each battery before they were dead.

So, I'd say that the NiCad generic 3.8 Ahr for sure do not hold a charge. Fresh off the charger they are fine but do not last as long as actual DeWalt batteries, guessing a third less run time.

So got a FARMER math question: Since the 3.8 Ahr generic runs like a 2.2 Ahr DeWalt would the 4 Ahr generic run close to the 3 Ahr DeWalt?

Similar but different question: I see they offer a 5 Ahr lithium generic battery that looks just like a Nicad 18V in shape and size. Lithium hold storage charge better than Nicad. DeWalt charger is good for both Lithium and Nicad. Do you think the 5 Ahr generic lithium would likely match up with a 3 Ahr lithium from DeWalt?

The 5 Ahr lithium has a battery gauge on it like some of the other higher volt DeWalts. I kind of like that option...
My dewalt came with 2ah batteries so that all I have experience with, except for the 5ah clone I bought. I can tell you the clone will easily last 3 times as long as the dewalt 2ah batteries...
 

Mr. Peet

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So after 2 months of being frustrated every time I wanted to use the cordless DeWalt tools with the new dead batteries, I decided to drop the Ni-cad and go with the Lithium- ion. Got the new 5 amphr 2 pack, they arrived yesterday, took an hour each to charge. Unlike the other batteries, the charger light flashes while charging and stays on when done. With these two, the light flashes and goes out when charged. I do like the charge indicator on the side of each battery. I used one for 10 minutes with the saw-zal, and it lasted. Both it and the other still read full charge this morning. Hope this purchase works out well...
 

djg

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You bought Li ion packs to fit your Ni Cad Dewalt tools?
 

TXMoon

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I guess you get what you want but this video convinced me to pony up the extra cost of the factory DeWalt batteries.
 

TXMoon

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That is a great price..20V anything DeWalt is usually $89+
Back in Feb I picked up a 20V 5AH battery for $65 on Amazon. It says they are still available but with shipping from Amazon the way it is now I am going to hold off.
 

Mr. Peet

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3 days and the knock-off's are still holding full charge. Good sign so far...The new Ni-cad replacements would go dead in 24-30 hours just sitting. The original old DeWalt batteries would die overnight.
 
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