Question: Can anyone suggest an alternative to energy from a battery?

I'd like a system to replace my deep cycle leisure battery, I currently use [this](http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_264265_langId_-1_categoryId_165475) 110 AH leisure battery with a 1200W inverter. 
I run my computer, lighting and sound system off it while I'm "out in the sticks", It works just perfect, there's more than enough energy to get a couple of days usage between charges, I just wanted to know if there's a greener way of storing the energy - instead of using ye olde plastic box full of acid and corroding metal. 

I'm not interested in using a diesel or petrol generator, I'm looking for something a bit cleaner and greener than that, was thinking about the possibility of running a dynamo off a bottle of pressurized gas or air? - I'd probably need an unfeasibly large tank for this tho! 

Cheers Chiphackers :)

Answer: 
I don't think there's anything necessarily un-green about a battery, unless you're talking about the production methods of energy required to manufacture it. All of the materials in the battery were in the environment somewhere - all the manufacturing process has done is concentrate it into a small package.

If there's anything un-green about a battery, I'd say it's the inefficiency of the cycle. While the above idea is very clever, you still have to put some energy into the system in the first place. If that's a hand crank, then that's pretty good...without getting into the question of the green-ness of the food production that put the energy into the food and then into you (the mind boggles). 

Ultimately, I would look at what local power sources you might have available...wind, solar, hydrothermal, geothermal, hydromechanical. And if you want to take it really seriously, you then have to look into what energy went into refining the materials necessary to harness the energy, transporting it, warehousing it...

This is probably more trouble than you asked about, but "energy out in the sticks" is a favorite research topic of mine. If you want to get REALLY serious about it, live underground and don't need 90% of the energy you use in the first place. Then you can run a generator guilt-free in the knowledge that you're light years ahead of the pack.
One alterna-power answer might be fuel cells. A more old-fashioned and commonly available one would be a generator running off some liquid fuel (probably diesel). You might still want a buffer battery for that, of course, but you might be able to get rid of the inverter in some cases.