I had the idea for a long time to make a backup power source on the battery, such a kind of “Power Bank” with a high capacity of 12 V. You can take it with you on a hike or fishing and charge your phone, laptop, flashlight or any other gadgets. br>Yes, even keeping such a house can be very useful if you suddenly turn off the light.The second is a mini box or tool case. This can be bought in a construction shop. It is relatively inexpensive.The third is a panel with a cigarette lighter and USB connectors. Which I bought -HERE. It all connects is very simple.There are three switches on the panel, the first one I did is general - it cuts off the entire load. The second - uses the outlet with a cigarette lighter. But the third - a socket with USB outputs. USB 5 V converters are built into the cigarette lighter case and can not be seen.I punched this entire control panel into the side wall of the tool case.My backup source was very compact and convenient, especially for carrying, as it has an excellent handle. I took such a source with me to the campsite and charged it from there solar panels. In terms of the campaign, the Power Bank showed itself only on the good side.
What is needed to build a Power Bank?First of all, a rechargeable battery. The type of one that is used in the uninterruptible power supply for the computer. I found a 12 V battery and a capacity of 7 Amp-hours. There are of course batteries and more powerful, but I took what was at hand.
How does the battery fit?Layer on the bottom of the box building insulation. The battery is on it. On the sides, the battery also fixes the same insulation, but in several layers. Verification also presses a thicker piece. The battery is kept perfectly, "Power Bank" turned out almost shockproof.
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