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Author Topic: Second life for the Dewalt DE9118 7.2-14.4V NiMH charger  (Read 1240 times)

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Offline Kiriakos GR

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Second life for the Dewalt DE9118 7.2-14.4V NiMH charger
« on: July 02, 2020, 11:04:47 AM »
Dewalt DE9118 this is another old generation pulsing charger this be specially designed for Ni-MH & Ni-CD cells.
Unfortunately the Chinese Dewalt, does not hold any information's about it on their website.
And this is a great example of how much  the Chinese Dewalt this cares for it past.

I got this charger as half-gift and I say HALF because top cover this were missing.
In my surprise this PCB works.  :)

The Dewalt DE9118 does not include temperature detection for the battery due a sensor.
The charger will start charging immediately when the battery seems to have at least 4V at their poles.

DE9118 DC current specifications this is at 1.3A, when  Ni-MH or Ni-CD cells they are connected to it.
The internal resistance of the battery or battery pack, this is essential for this charger.

In my first test with one 12V 7AH (battery for small UPS) the charger delivered 1.6A
Then I thought that this is too much for a single battery and added and a second one in parallel.

Now the the DC current output become half
, but even so this is correct and upon the electrical specifications of those batteries.  8)

In conclusion the Dewalt DE9118 other than capable charging battery tools packs at 7.2 and 14V this is also capable charging two regular 12V 7AH OR a single 12V 17AH  ;)

True voltage output at charging this is 16.3V
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