Last year i had knew the ultracapacitors and buy some for the meter for backup time ,oh ,that's better than battery ,though the price little more than battery ,but ultracapcitor can charge and rechange the life more than battery . i believe after days the ultracapacitor will replace the battery.
I know of my supplier,her name is suely ,who worked in a special manufacturer of ultracapacitors in China . There are many types supercap,2.5V 0.1f ~2.5V3000F ,5.5V0.1F ~5.5V4.0F .
If everyone interested in this ultracapacitor ,pls contact her with email.
Email : suelydong [at] yahoo.com