My overseas trip was unexpectedly extended so at an airport Brookstone I bought an
iGo Power Xtender (AA powered) and
A54 PSP tip to charge my 505. It worked fine and recharged from 0 bars (low battery warning) to 4 bars in about 30 minutes with no problems. I don't know how much is left in the AA batteries, but I'll see if I can get a 2nd recharge out of them.