Saturday, January 14, 2012

Praxis: Charging cell phones with water.

Mobile phone charger that runs on water invented for 'people who spend time away from the electricity grid'

4 comments:

DJMoore said...

How is this better than an ordinary external battery? You still have cartridges that need to be replaced and moistened for use, and the whole thing looks bulkier than most battery packs.

Jeff said...

Looks like something worthwhile having in your "bugout bag" ! My only question is how long and under what restrictions can you store the "pucks" ? >MW

Anonymous said...

The primary advantage is supposed to be a very long shelf life for the chemical units- But Lithium batteries already have a 10 year shelf life, and store a much larger ammount of energy per weight and MUCH larger per volume, can be used in freezing temperatures and you can turn the device on/off as needed... This device turns on when you add water and then runs for 10 hours, period. Plus, it's suggested price is quite high and no one in the USA actually has them offered for sale yet.

Backwoods Engineer said...

This should be titled "Charging cell phones with sodium silicide." This isn't going to be available in a SHTF situation. A much better solution would be an Edison battery: iron and nickel electrodes, with lye for electroyte.

Lye can be made easily from burned plant matter and water. Iron and nickel are always available by salvaging them from everyday objects. The cells can be recharged, but it's not necessary; you can create a new one from scratch, and you have energy.

Praxis: the voltage of four series Edison cells is within the tolerance of the USB bus voltage spec; in other words, 4 cells can charge a phone or other device that normally charges off USB.

Just my opinion.