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                                                        -  I always seek for the  opportunities to benefit the society!

 

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(Please chick the image to enlarge!)

 

The battery holder and circuit board. This circuit enable maximum use of energy from the battery.

Typical efficiency over 90% and run live is over 24hr with 2AA alkaline battery.

   
Original bulb is replaced with 3 super bright white LEDs.
A more closer look.
This photo is taken by my Digital Camera Cannon PowertShoot A20 with about 1 second exposure time. The camera is similar to using film of ISO100.

 

In honest, it is just enough to read book.