gandymarsh

https://i.stack.imgur.com/wDBE0.jpg

Just FYI those charging boards need at least 1 amp to power them. I would suggest using a wall wart that is capable of supplying 1 or 2 amps instead of your computer.

I've never heard of the ones that you linked to that have brand names. I have a Nitecore i4 that works well but is slow when charging 4 cells. On ECF, there are many people that recommend Xstar chargers. If you want a DIY solution, you could buy some TP4056 charging boards on ebay. They use a 5 volt mini or micro USB cable. They require some soldering and 18650 battery holders. https://www.ebay.com/itm/10pcs-TP4056-Micro-USB-Charger-Module-5V-1A-18650-Lithium-Battery-Charging-Board-/272570928685?hash=item3f767e4e2d

If your string of LEDs runs on 12v, that's most of your system right there. The voltage should be printed on the strip. That LED strip you have doesn't appear to be waterproof. If you plan to use it, make sure it's protected from water. You can buy waterproof LED strips on ebay, Amazon etc.I'm assuming your golf cart is gas powered as most electric ones run on higher voltages.All you need to do is use a barrel connector, like the one on your power supply. These are usually 5.5 mm (outer diameter) x 2.1 mm (diameter of the pin inside). You can buy those on ebay or cut off the one on your power supply. The center pin is usually positive. Connect wires (these wires can be very thin, like thin speaker wires) to the battery terminals. How you do that depends on the type of connectors used on...

If your string of LEDs runs on 12v, that's most of your system right there. The voltage should be printed on the strip. That LED strip you have doesn't appear to be waterproof. If you plan to use it, make sure it's protected from water. You can buy waterproof LED strips on ebay, Amazon etc.I'm assuming your golf cart is gas powered as most electric ones run on higher voltages.All you need to do is use a barrel connector, like the one on your power supply. These are usually 5.5 mm (outer diameter) x 2.1 mm (diameter of the pin inside). You can buy those on ebay or cut off the one on your power supply. The center pin is usually positive. Connect wires (these wires can be very thin, like thin speaker wires) to the battery terminals. How you do that depends on the type of connectors used on the battery. You might be able to pinch the wires in between the battery terminal and it's cable clamp. Make sure the polarity is correct, positive to positive, negative to negative or it just won't work. Nothing bad will happen if the polarity is reversed.Use an automotive style switch, toggle, rocker or push button (not a momentary push button) that interrupts the current on one of the wires. Make sure the polarity is correct, positive to positive, negative to negative or it just won't work. Here is a basic DC circuit with switch. The light bulb represents your LED strip.

It's an adapter for a socket wrench. I can't imagine when it would be needed.

If I'm not mistaken, those tables have a slightly rough surface. You could fasten a small piece of plexiglass or a scrap of smooth plastic to the table with screws or epoxy.

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It depends on the amount of current (amps) you are talking about. USA made switches have the voltage and amp ratings molded onto the switch. They are usually rated for AC current. If you are looking for a switch to control a light fixture or small appliance that doesn't draw a lot of power, there are many inexpensive switches availableSomething like a heater with a high amp draw or a big motor will require a more heavy duty switch. A couple companies that sell many types of switches are mouser.com and digikey.com.