Portable Saltwater Battery

***Read Carefully*** Saltwater Battery, in others words, is to convert chemical energy to electrical energy. We need some engineering company or engineering individual can make and assemble something like appear in the links below: Small Portable Examples: [login to view URL] [login to view URL] Non Portable High Performance (deep cycle) Example: [login to view URL] Requirements: At least 12V At least 500 watts can works continuously for up to 72 hours Very Easy to operate and very easy to change the salt water and/or others maintenance elements Build in positive and negative poles to be connected to external inverter. Very good isolated because any kind of water and/or liquid cannot touch or even reach the +/- poles ***This is an open project, what I mean is, if all result positive, you can copy and paste and bunch a lot of money*** ***NO HIDDEN FEES AFTER SELECT A FREELANCER*** ***NO SURPRISING FEES WILL BE ACCEPTED*** ***We need a Clean Job, a Professional Grade Job PLEASE !! ***We need the entire job done in 15 business day. My Budget FOR OVERALL PROJECT is $120 (USD), I will take the person with the most interesting bid content, reviews and $ offer. This is one of the few phase of this project, we will have more jobs if this project is successfully accomplished. Suggestions are welcome, questions are welcome. Thanks and happy bidding!