Low ESR, high ripple current, long lifetime, small case size, AND of course low cost(!)... Very often engineers have to search for "perfect" capacitors solution for their designs.
Panasonic has dedicated himself to providing such solution with its THT type aluminium lytic caps. And here it is -FR series.
Wide voltage range from 6.3 volt to 63 volt (100 volt under development and to be available soon)
Wide capacitance range from 4.7 uF up to 8,200 uF
Low ERS down to 12 mOhm
High ripple current up to 3,820 mArms
Long lifetime of 5,000 hours to 10,000 hours @105 degreeC
Are you looking for a capactior solution with both HIGH efficiency and LOW cost? Take a look here: http://industrial.panasonic.com/www-data/pdf/ABA0000/ABA0000CE132.pdf