How can I recharge an A100 battery without access to mains electricity?

[a10a8m96m4b53e29]

I'm going 'into the wild' for a few weeks and I need my camera to work for that time. I don't really want to buy or carry 3 or 4 spare batteries. Any other options? Solar power?

[Blencogo]

I hope you are going somewhere sunny!

http://www.thenaturalstore.co.uk/product/free-loader-pro-portable-solar-charger/25642

However, it may be cheaper and less hassle to take spare batteries!