♡ 52 ( +1 | -1 ) What about palm?I would rather suggest a Palm. I got my second Palm from eBay at around $40 US dollars including S&H. It is a used black and white model, but chess is just black and white.
It has better screen and interface compared the chess LCD machines. I usually download the Fritz analysis onto this Palm and review them during my commuting time. I don't think any LCD machines can do that. If you are willing to pay more, those new palms are colourful and even play movies. However, I'm happy with my old basic one.
♡ 23 ( +1 | -1 ) Chess MasterIf you want to go the cheap way and your kids have a gameboy advance(as mine do) I just bought a chessmaster game for it. It doesn't store or analyse games but if you just want to play against a tough opponent its great.
♡ 59 ( +1 | -1 ) I've got the even older Gameboy (not advance) with the Chessmaster cartridge. It still plays a good game and seems to have very good battery life. I play it for about 2 hours each day - commute to and from work. The batteries seem to last about 2-3 months. Like skeetress0 said - it only plays games but does seem to have an OK opening book.
The hardest thing to get used to with them is the itty bitty screen :)
Mine is probably a relic in technology terms so is not available anymore except second hand.
I am not sure what you mean by Palm that can store chess DB. I think PocketChess Deluxe is the closest thing. Here is what I know.
Palm has limited base memory, 2MB to 32MB. You can expand it using a memory card or a stick. However, I don�t think it is practical to run a 200MB+ DB with search function with limited CPU power and small screen of Palm. I don�t know any Chessbase style chess application on Palm, and I don�t expect much of it.
What PocketChess can do is it can read PGN files, an annotated PGN file is 1k-6k in size. For example, you can download all 300 games of Two Knights Defense into your Palm. Or the best 100 games in history. ChessMaster (slow and clumsy), Chess Genius or Chess Tiger (neat and fast) for Palm would be a good enough to play against palm, but no DB function. And the Desktop Companion program of PocketChess makes it easier to download games. You can download the trial versions of the above programs from the net to check if it is good for your need.
What I do is download the games I played and run Fritz analysis, save them to PGN, then download on Palm. I can replay move by move, including variation suggested by Fritz. PocketChess can do analysis or suggestion of a move, but I rarely use it as it does not have enough power.