Remember that Water-Powered Clock that we wrote about last week? Now you can get a calculator powered using the same kind of environmentally friendly technology.

Add a few drops of water to the removable battery and insert it in the calculator for up to three months of use. When the display begins to fade, just refill the battery.

Features:

• Eco-friendly new battery can be re-energized by addition of water again and again
• Battery can be stored in a dry state indefinitely, and activated when needed
• Ergonomic design
• Rectangle shape
• Large LCD display
• 12-digit display for home, school or professional use
• Large easy to use buttons
• Buttons measure approx 3/8-inch square
• Includes standard adding machine functions such as memory + or -, last digit correction, rounding, automatic decimal, etc.
• Two non-slip feet on bottom of calculator

The H2O Desk Calculator is yours for $24.95 from the Solutions website.

Ecogadget has put together a list of Water Powered Alarm Clocks.

The one that stands out from the crowd is the unique H20 Multi Function Alarm Clock ($20) – running on a replaceable water-battery.

By just adding water you are providing the clock with an endless source of energy, never needing conventional batteries again! This clock also incorporates an innovative method for changing between modes – simply rotate the clock through 90-degrees to automatically change funtion from Time, to Alarm, to Temperature (F and C), to Coundown timer. The display automatically changes orientation with clever use of Newton’s gravitational theory!

(Via GadgetVenue)

H2O Waterproof Playing Cards ($10) is a handy little thing for the beach or by the pool. This set of translucent waterproof playing cards comes in a protective case, which is available in four different colors.

Design: Jason Nip

(Via Accessoarfeber)