What do you do with a 350 Farad capacitor?

[HarryA1]

You could charge the cap. with  solar cells during the day and light an LED at night?

No batteries required!

see:

http://www.ebay.com/itm/Maxwell-D-Cell-Power-350F-350-F-Farad-2-7V-Super-Capacitor-Cap-Ultra-Battery/281173041415?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D38530%26meid%3D4d48fa267f404223bb70c8c93e334efc%26pid%3D100009%26rk%3D1%26rkt%3D1%26sd%3D161240113620

man that is some url!