Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What happened to Casio? Why isn't Casio coming out with a tiny portable for the HDTV conversion? I love my little portable and now it will be useless. Plus, it used 4 AA batteries that lasted 4 hours.
Document: I own a 3" Casio Portable that turns to the 3 main TV stations and bring them in perfectly on 4 AA batteries for emergency use but can not longer be used with the Digital conversion. This Axion TV that I purchased to replace it does not compete and I have yet to find the 3 main TV stations with very little instructions in the booklet and a customer service # that does not return my calls. It is constantly searching for signal in spite of using the added antenna.
Due to the conversion to HDTV we reviewed the small television to sit on the window ledge in the kitchen. This product exceeded our expectation. There is an accessory of an external antenna the we used and found out that we get excellect reception even without this. It is light;  it is convenient to move; and I learned has an internal battery that last for at least six hours and I can thus carry this anywhere I would like. Thank You Amazon Again for another great product.+
I purchased this portable TV to replace a tiny analog Sharper Image TV that was AA battery-operated. Knew the old one wouldn't work after the digital conversion. It works great! Easy to program and picture is so sharp. Also liked that it came with all the accessories. Have already recommended it to friends and plan to purchase one for my father's birthday.
Didn't come with a case (used a portable DVD one, but that's ok). I am trying to get a different one, but they pretty much all use the lithium rechargeable. Inquired about the cost, not bad, but I'm wondering if it is something the owner can do; without voiding the warranty. I'm still looking for an alternative. This is what sucks about digital tv, plus, all radios that had tv bands are useless now.
I ran the TV on battery only and it lasted for 2 hours, not 4 hours. No big deal in my book unless the power goes out for more than 2 hours.Buy and enjoy!
Finally have a way to use this with batteries. On another website, I bought a portable battery charger you use with the car charger for this little TV. The portable battery charger uses 8 D-cell batteries and your 12-volt car charging cord (or USB power cord). Soooo, with an ample supply of D batteries, this works during a hurricane! Yesss!! The external antenna that comes with this is a big plus, too.
I drive a truck for work and at my stops I used to watch some tv and football games on Sunday & Monday.I watched  on my casio analog portable tv and never had a issue. Ever since th switch over to digital  I have not found one little portable digital tv that even works right I can only find channels when I am inside my house or near my house but I did not buy it for that.
With the digital conversion fast approaching I wanted to surprise my husband with a reallly nice portable digital television to replace his old faithfull pocket sized portable RCA.Instead of jumping the gun, I waited until a bit more was published about the new portable digital televisions before making my decision. This past Father's Day seemed the perfect occassion to reward my unsuspecting husband with a gift I hoped he would love.This Axion AXN-8701 7-inch handheld digital certainly did the trick.
Speaking as one who always bought the latest handheld portable TV every 5 years or so, I feared the DTV conversion would do me in. But this Axion  7in TV saved the day. For 119.99 (free shipping and no tax) I got  7in color DTV with internal rechargeable batteries and power cords for 117VAC as well as 12VDC cigarette lighter, and a remote control! For houseguests I keep it on the vanity in my spare bedroom, available for whatever portable use I need it for.
What A great little TV! I get a bunch of stations, several "Air Stations" I did not know existed, disregard those who say batteries don't last long, at full charge I get over two hours of operation, oh, you will see the little battery symbol on the bottom after about 45-60 min. but it keeps right on going.
Answer: Yes, Casio had it right with that tiny TV. However, what I'm getting is that none of these portables are working well with digital. The signal keeps getting lost. I live far from the tower so haven't much hope that anything will work like the analogue casio. Bummer!