Application of piezo-electric effect

[Young Learner]

Can I use the piezo-electric crystal to charge a small battery and connect the battery to a load.
The problem here is that the battery has to supply current to the load for a short period. Then it has to be recharged by the crystal. will I be able to use the same battery for charging and discharging?

The circuit for piezo-electric storage found in the internet is http://ej.iop.org/images/0957-0233/23/1/015101/Full/mst399991fig10.jpg

Should I directly connect the load to the battery.

Can I be able to feed back the vibration produced by the load to PZT and hence using it for charging the battery

 

[UltrafastPED]

Here is one way to do it: http://phys.org/news/2012-08-self-charging-battery-energy.html

And another: http://www.tc.umn.edu/~drsteve/Projects/Implantable%20Piezoelectric%20Battery%20Charger.pdf

And some advice on how to build your own:
http://www.askmehelpdesk.com/physics/there-way-harness-current-piezo-electric-plate-630419.html

Note that the piezo is a high-voltage, low current device.