There are external blitzes which don’t require an electric source to operate. You can turn them without a power cord. Useful. :)
Note: Tip via Radu Grozescu.
I am a Freelancer. My expertise is in SEO (Search Engine Optimization) / UX (user experience) / WordPress. Co-founder of lumeaseoppc.ro (series of events on SEO & PPC) and cetd.ro (Book on branding for MDs). On a personal level, I like self-development - events, sports, healthy living, volunteering, reading. I live in London, and lots of things live in me.