There are many types of wire and cable insulations. Some wire is meant for indoor use, some for outdoor use and even some meant for underground

PVC insulation is the most basic which you’ll find on cheaper indoor wire and cable. Hook up wire has PVC insulation and it’s mostly meant for appliances and other indoor applications. PVC can’t go outdoors or in conduit because it doesn’t have protection against any type of moisture or weather.

Electrical wire has PVC insulation with a nylon coating over it. The nylon repels rain and moisture so that it can’t hit the insulation or the bare copper. So THHN wire can go outdoors and in conduit, but it can’t go directly underground. Romex is a cable that’s made from THHN wires but it still can’t go outdoors or in conduit because of the ground wire in it. There’s a bare copper ground wire without insulation in the cable, but the PVC jacket isn’t strong enough outdoors to protect the ground wire.

If you need an electrical wire outdoors that can do anything then UFB cable is what you’re looking for. It has a tough jacket to protect against anything that could happen outdoors. It’s also known as an underground cable because it’s suited for direct burial in the ground without conduit or tray. UFB cable is made similar to Romex wire because it still has the THHN wires and a ground wire.

Those were mostly the insulation types in the electrical wire field. I’ll get into the portable cord field in a different article. That has to do with the rubber insulation types for power cable and SO cable. Most of them can handle the outdoors so there are other variations that need to be accounted for. Just remember that if you’re paying for it then make sure you need it all.

There are different types of batteries and battery chargers, depending on their usage and application. The generally available ones are the types of electrochemical cells, like the fuel cells, electrolytic cells, galvanic cells, voltaic piles and flow cells. A battery’s features depend upon many various factors, like the current drain, internal chemistry and temperature. Let’s discuss the two broad categories of batteries:

Primary Batteries

Once assembled, primary batteries can immediately produce a current. Disposable batteries are a type of primary cells and are supposed to be used once and thrown out after. Primary batteries are most commonly in used in low drain appliances or portable devices that do not require a very high voltage. Disposable batteries cannot be reliably recharged, as the chemical reaction in the battery cannot be reversed and also the active materials do not get converted back to their original form. It is advisable that you do not attempt to recharge primary cells. In some cases of primary batteries, like the batteries used in the telegraph, circuits were restored back to operation after replacing the components of the battery cell which was consumed during the chemical reaction.

Common types of primary disposable cells are alkaline and zinc carbon batteries. These batteries generally have a high energy density as opposed to the rechargeable batteries, but it should be noted that disposable batteries do not perform well in high drain applications, which requires a load under 75 ohms (75 Ω).

Secondary Batteries

Secondary batteries are also called rechargeable batteries. Secondary batteries must be charged with electricity before using them. The rechargeable battery has active materials that are usually assembled in the discharged form. The electric current used while recharging reverses the chemical reaction that occurs during the usage of the battery. Secondary batteries are also not indefinitely rechargeable, as the active materials used in the cell get dissipated and also there is internal corrosion and loss of electrolyte.

You require proper devices to charge the batteries called chargers or rechargers. The oldest rechargeable battery is the lead acid battery, which is a type of a wet cell. This battery is noted for containing a liquid within an unsealed container that requires it to be kept upright. The battery even needs to be kept in an open ventilated area so the hydrogen emitted during overcharging can get dispersed properly. A lead acid battery is used commonly in cars.