If you're looking for a torch for the K810 (might work with K800 too - I don't have one, so I can't say) then visit esato.com. It's a website that reviews mobiles, etc, but specialises in SE.
Do a search for k810 and torch, and you should find that there's a small java program that uses the auto-focus red light as a flash.
I've been using this since upgrading from my old K750 and discovered that I used the torch a lot more than I realised, and have been happy with the results.
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K810 Torch
If you're looking for a torch for the K810 (might work with K800 too - I don't have one, so I can't say) then visit esato.com. It's a website that reviews mobiles, etc, but specialises in SE.
Do a search for k810 and torch, and you should find that there's a small java program that uses the auto-focus red light as a flash.
I've been using this since upgrading from my old K750 and discovered that I used the torch a lot more than I realised, and have been happy with the results.