JKoltner Posted March 30, 2011 Report Share Posted March 30, 2011 I hesitated for several months before getting some of the new 12V Max lithium ion tools based on the fact that they use a new charger, and it annoys me to have to carry around several different chargers. As such, I've been contemplating building an adapter to allow these new batteries to charge in the older chargers -- at least the "older" ones that support lithium ion batteries, specifically the DC9310, DC9320, etc. (As most of you are probably aware, the 18V lithium ion battery packs contain all the charging circuitry inside the "turret" portion of the pack and the DC9310 becomes largely a "dumb power supply." While I suspect that even the really old NiCad-only DeWalt chargers could be "dumbed down" like this, I imagine that doing so reliably is a little tricky and hence can understand why DeWalt just brought out a new series of chargers instead -- and they certainly know a lot more about their chargers than I do.) The idea here is that you'd snap the 12V Max battery pack into an adapter that would look largely like the turret of the traditional battery packs with a flat surface at the bottom. (Except for being two pieces rather than one, this is really exactly what the DeWalt 18V battery packs do, as mentioned above -- so this isn't at all a new or novel idea!) *Possibly* you could also actually *use* the new 12V Max batteries in the old 12V tools, although in practice I'm not sure this is that horribly useful in that the "12V Max" packs are really only ~10.8V under load (...maybe using them with 9.6V tools would be better!), and don't pack in as much energy as the original battery packs anyway. I realize that you'd still end up carrying your old charger plus an adapter or two around in this scenario, but at least to me that's still better than carrying around two separate chargers. (And note that while you can purchase an old charger that works off of 12V cigarette lighter connection -- the DC9319 -- you can't yet purchase something comparable for the 12V Mac batteries... although I suspect that sooner or later DeWalt will remedy this.) Does anyone else think this would be pretty useful? If so, might I ask how much you'd be willing to pay for such an adapter? My gut feel is that these could be sold easily (i.e., actually turn a profit) at $40, possibly at $30, and probably not at $20/ea. Even for me, $30 is a bit on the high side, but it's pretty difficult to build much of anything electronic when you're talking the low quantities that tend to require that you keep the manufacturing in the U.S. and don't benefit from any significant quantity discounts on components. Your thoughts are appreciated! Thanks, ---Joel Quote Link to comment Share on other sites More sharing options...
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