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Great workmanship! Compact design. Nice work!
How to clean Apple Ear Pods.View Instructable »
The fuse is to protect the circuit of the charging wire. If it gets grounded some how by accident, it will pop the fuse instead of melting the wire and possibly causing a fire. Connecting directly to your car battery is totally fine. Connect it as he has done in this instructable.
Connecting it directly to a car battery is the same as plugging it into your cigarette lighter socket. In other words, it's totally fine to connect it directly.
On the bottle that I used, it has little dimples in the bottle, a person looking at it may think that they are holes but they are not. If you drill any other holes in the bottle besides the 2 for the shaft, it gives the mouse a spot to start to chew their way out in no time.
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