battery charger...?
unless the battery is made for rapid charge, the 1/10 capacity is the normal charge time.
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DUBLIN - (Business Wire) Research and Markets ( http://www.researchandmarkets.com/research/c14efe/opportunities_for ) has announced the addition of Frost & Sullivan's new report " Opportunities for Green Battery Chargers " to their offering.
This research gives a bird's eye of the nascent renewable charger market. It includes an overview of the different types of technology which are prevalent in the industry. The study discusses the different key drivers that are in favor for the industry as well as covering certain key issues
Research Overview This Frost & Sullivan research service titled Opportunities for Green Battery Chargers provides an overview the evolving dynamics, trends, and, restraints of the nascent charger market that uses renewable energy as a power source. In this research, Frost & Sullivan's expert analysts thoroughly examine the following markets by product type: solar chargers and wind chargers.

unless the battery is made for rapid charge, the 1/10 capacity is the normal charge time.
Ebay is loaded with them. I have one listed there myself right now. They are called Solar Controllers. Do an ebay search for "Solar Controllers" They protect the batteries from overcharge, and also prevent the batteries from discharging back through the solar cells when the clouds are in.