Went to RadioShack today and bought the things needed to have a "Travel Charger". Bought the following to make a travel charger: Power tip "A" - Enercell # 273-334 Power cable - Enercell # 273-348 I already had 2 each 9v power connectors and a plastic "project box" that would hold 2 9v batteries and heat shrink tubing- Sorry no SKU ' s for those items. Construction - Wired the 2 power connectors in parallel (serial will produce 18v!) and connectd the the positive line to the power cord that has the white strip on it and the negetive wire to the plain black power wire. Soldered the power connector wires to the power cord then used heat shrink tubing to insulate. Connected the batteries then used a multimeter to verify that I had the Travel Charger tip set to match the polarity that the stock GENTouch had. Inserted the whole mess into the project box and closed it up. Plugged it into the GENTouch and I was good to go. You can follow the same basic setup to build a box to hold as many batteries as you like. Just remember to wire in parrallel and the output will always be 9v(ish).