Prototype battery is 3 times cheaper & 1.5 times more energy-dense

http://www.businessinsider.com/these-twins-built-their-own-lab-to-test-a-revolutionary-battery-design-2012-2

/ Stanford  dense graduate /

Why are TVs so Cheap?

http://www.theatlantic.com/business/archive/2011/12/why-are-tvs-so-cheap/250562/

Batteries for electric vehicles – the news is all good (almost)

Electric vehicle (EV) batteries will be lighter, store more energy & cost less. By 2015, they will be 30% lighter & 70% cheaper for the same capacity. Further improvements are predicted by the United States Department of Energy in coming years.

The bad news? We have to wait!

More at: 

http://www.goauto.com.au/mellor/mellor.nsf/story2/502BC476D1003D00CA2578AB002147AE

Now that Samsung is making LED lightbulbs, maybe they'll be cheaper

Warning: STICKER SHOCK!

Something the article below ignores is the greatly extended life of LEDs: 20,000 hours for the light output to halve is typical. When your 100 Watt equivalent LED globe has done 20,000 hours (that's the equivalent of over 2.25 years continuous operation), you can move it to somewhere that requires a bit less light. 

http://www.gizmodo.com.au/2011/05/now-that-samsung-is-making-lightbulbs-maybe-theyll-be-cheaper/

Easier/ Cheaper Nanomaterials

http://www.gizmodo.com.au/2011/03/making-nanomaterials-just-got-a-lot-easier/