For instance: the 19.2v 3.5Ah Nickel-Metal-Hydride packs for the panasonic drills are really 16 1.2v 3.5Ah sub-C cells inside the case. You can buy Panasonic sub-C Nickel-Metal-Hydrides individually (or by the case).They'll retro-fit in any DeWalt, Milwaukee, Makita, etc. cases with a soldering iron, a torx (or other) screwdriver and some time.
Increase your DeWalt to twice the runtime!
</old R/C fanatic>
[This message has been edited by sparky66wv (edited 03-22-2005).]
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI
I've dealt with batterystation in the past and like their service.
One word of caution: cells are rated by voltage, ampacity, and _internal resistance_ among other characteristics. In general, higher amp-hour cells also have higher internal resistance, meaning greater voltage drop under load. You want to be careful about substituting NiMH cells for NiCd cells, because if you select cells with high internal resistance, then in a high load application you will actually get _less_ useable output from the cells.