Toni - I'm quite sure no one is withholding any battery technology from the market. There's a bunch of problems with the existing battery technology that many companies are working hard to fix. Improved batteries will make it to market soon and there will be continual improvement beyond that (just like with automobile technology).
Originally Posted by Toni Ciuraneta
In the development of the GM Volt, for example, the biggest problem is the batteries. GM is just betting that acceptable batteries will be available in time for shipment in 2010.
The primary problems are: capacity (it takes about 0.4kWh/mile), weight, heat, life, and safety (think "not catching on fire"). The batteries also have to be safe in a crash.
The people who make batteries have nothing to do with selling gasoline so they have no incentive to delay availability of improved batteries.
I look forward to plug-in hybrids. I believe they are the best solution for reducing gasoline usage. The infrastructure is here today to deliver the power, and the drain will be at night when demand is presently low so we won't have to build lots of new distribution and generating capacity to support plug-in hybrids.
Hydrogen has a bunch of problems which I can expand on if you're interested.
Go into the world and do well. But more importantly, go into the world and do good.