I've been using a Palm Pilot the past several years to keep my addresses and other information handy.  Recently, my charger has disappeared and I have been unable to locate another.  I've decided the old paper and pencil method might not be such a bad idea.  The first one I bought was way too big.  I want one small enough to keep in my bag and big enough to keep track of more than just the name, address and phone number.  This is actually a little bigger than my palm, but it is thinner.  There is room for name, address, 4 phone numbers, e-mail address, birthday, and about 2 1/2 lines for notes.  It might be a little tight for adding directions to their house, like I have in my palm, but I guess I can take up another slot for that.  It is spiral bound, so it will lie flat when open and it had an elastic strap to keep it closed.  It may be low tech, but at least I don't have to recharge it.