In honor of Earth Month, Bracketron is helping you to be green while saving serious green! They are offering the Stone GreenZero mobile device charger at a 25% savings from March 20 through April 30, 2013. The Stone GreenZero charger uses Bracketron’s exclusive GreenZero Technology, which they say is “the most eco-friendly way to charge mobile devices while totally eliminating the wasteful stand-by consumption (Zero idle power) that other chargers consume when left plugged in.” You simply plug the charger into a wall outlet, plug your device’s cable into the Stone’s USB jack, and press the green button to turn on the charging circuit. When your device is charged, the Stone powers off so there is zero wasted stand-by power. The Stone has a 1A USB port, so it works to charge any USB-chargeable smart phone, MP3 player, eBook reader, or similar device. You’ll need to supply your own cable. The Stone GreenZero charger is great for home use and small enough to throw in your gear bag. It’s normally $24.95, but you’ll save 25% during the Earth Month special period. Simply enter the GREEN coupon code at checkout.