Svenska Kronor.
Currency in Peru: nuevo sol (PEN)
Peru
Peru changed currency in 1985 and 1991. Check with your bank.
batteries
In the mountains of Peru people use alpaca for their wool and sometimes meat.
electricity and batteries
Yes here is a guide on how to use a cell phone in peru http://www.ehow.com/how_2042686_use-cell-phone-peru.html
I went to Lima, Peru.
http://www.countrycodes.com/
Use tool around Appleton ponds
Reed boats (on Lake Titicaca).