I have many 18v dewalt tools. I dislike dewalt batteries. I buy aftermarket Ni-Mh batteries from ebay.
Go to ebay and you will find 2 amp-hr Ni-cd aftermarket 14.4 v batteries. If I were you and had a charger for Ni-Mh, I would look for them on ebay too.
Keep dewalt tools, lose the dewalt batteries.