It's completely rechargeable, via USB or wallwart (5v), only takes an hour to fully charge the lamp. If you remember my previous project "DIY Portable USB Solar Charger", you can charge the jar using a solar panel. Guys, it's free and renewable energy!
Top 10 Practical Uses (Must Read):
1st.) Portable Emergency Light
2nd.) Camping Light/ Lamp
3rd.) Floating Pool Lanterns
4th.) Nightlight (Sidetable Lamp)
5th.) Constant Camera Light
6th.) Waterproof Rescue Lights!
7th.) Solar Powered LED Lamp
8th.) Garden Props & Ornaments
9th.) Replacement for gas lamps
10th.) Halloween Lanterns (Modded Version)
Real Life Scenario (My Experience):
(11/8/13) - A Category 4 typhoon has entered the Philippine area of responsibility. Codenamed: Yolanda
(11/8/13) - The president declared a state of calamity, told to brace ourselves.
(11/8/13) - My parents told me to charge all our lamps, unfortunately 2 out 4 emergency lamps were broken.
(11/8/13) - I made a simple "Jar Emergency Light" in just 5 minutes!
(11/9/13) - Typhoon reached our area with extreme rain and winds.
(11/9/13) - 1:00am The Blackout Started, my 1st time to use the LED Jar :D
(11/9/13) - It feels so cozy to light up a whole room as if there was electricity!