<http://schema.org/caption>
"Housing a lithium-polymer battery with a capacity of 4,200 mAh, the 115 g (4.05 oz) Power Brick is capable of charge speeds of up to 2 A"^^<http://www.w3.org/2001/XMLSchema#string>
<http://newatlas.com/lego-power-brick-charger/31023/>