Using an DC Adapter for Battery Powered Device

This Instructable will show you how to use a DC adapter instead of batteries. This will not only reduce battery expense and e-waste  but also provide consistent performance. Most battery device are used momentarily and draw up to a few watts so it will have little, if any effect on your electrical bills. Because this project uses bamboo, you won't need a lot of plastic.

Step 1 Cost Comparison of Power Sources

Based on the tables, electricity gives you more bang for your buck than alkaline batteries. AA batteries cost $330 per kWh and electricity costs $0.10 per kWh which is more than 3000 times as much!
Source: http://www.buchmann.ca/Article1-Page1.asp

Comments

[ovestein]

4x1.5v = 6v. Why 9v?
10.6v? messure the connection on the "battery" when the light is on.. it need's a load device.

[notstarman]

This design needs a current limiting resistor to imitate the internal resistance of the cells you have in line.

[l8nite]

why do you need the extra fake batteries? Won't just the adapter battery work?

[hanlin_y]

Yes. You would have to jumper it but you don't be able to power it with more than one cell.