You don't need to open it to charge either the iPad or the keyboard, the latter through a micro USB port. KeyCase includes a cable for this, but you'll need your own AC adaptor or computer to supply the juice. You can use the USB charger that comes with the iPad.
Folds up neatly and securely
Alongside said USB jack is a physical on/off switch, preserving the battery if you're not going to be using the keyboard for a time.
But I come back to the battery life. The manual says, "three years", and adds "if they [sic] are short of power, replace them". Yes, but how? A slide-out tray would be the obvious approach, but no, you have to rip out the well-glued keyboard out of the case to get at the hatch on the back. Or, rather, I assume so. I didn't go that far because KeyCase will want it's review unit back.
Now your average Apple fashionista may have long since replaced their Folio by then, or the thing may have come to bits of its own accord, but there's a principle at stake here: products, even accessories, should last. You might, for cost reasons, chuck a printer away when the ink's finished, but you won't do so because the supplier has made it nigh-on impossible to swap in a new cartridge.
For something so obviously knocked up in China, the KeyCase is actually quite good. The language in the "manual" is atrocious - "iPad is in searching Bluetooth keyboard working situation" - but the keyboard isn't bad and provides some handy iPad-specific functions. I'd say £65 is a bit pricey, but not ridiculously so. All things being equal, I'd rate it highly, but its hard to recommend an accessory that may be useless - or damaged after an over-agressive attempt to replace the battery - in three years' time or less. ®
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iPad to work
KeyCase iPad Folio Deluxe
...the iPad is transformed back into a Laptop, and the circle is complete.
The Obvious Solution
Surely the obvious solution would be to use a 2nd iPad with a full-screen touch keyboard displayed.
No worries about battery then, eh?
(You could also maybe use a 3rd iPad as a dedicated touchpad.)
not quite complete
The circle is nearly complete as Jim suggests, except that you've now got a netbook that isn't running a real operating system and can't do a lot of things you want it to do. Oh, and it cost you a lot more.
I don't see the objection to the 3 year life span to be honest, for £60 I think you can expect it to fail in 3 years, what other electronic frippery at such a low price would still be working fine after three years? Even a £200 (subsidised) phone only has a two year life cycle before it's upgraded.
Why does a physical keyboard have a key that brings up the... wait for it... virtual keyboard?
Too expensive for the limitations
I bought a £3 iPad case (with built in stand) and £17 bluetoothcompact keyboard both on eBay (UK vendor) ... both are extremely well made and the keyboard runs on 2 AA batteries. The mini-keyboard includes a lovely mini-mouse joystick and is a chocbloc style complete with working multi-media keys and of course it easily pairs with my mac mini linked to the HDTV.
I loved the Z88 .. wrote my PhD using one (in LaTeX) ... 8 lines of 80 characters .. excellent and the dead flesh keyboard was great but attracted the dust but was wipe clean! I even wrote a file upload/downloader to transfer data to/from a Sun 3 workstation ... ahh those were the days 8-)