How you charge your specific battery jump starter will depend on the brand and item you purchased.

1. Plug the battery jump starter into a regular wall outlet. Many car battery jump starters and chargers have standard plugs that can connect them to an electrical outlet. …
2. Use your vehicle’s A/C adapter. …
3. Use solar power.

The cranking amp rating – depending on the size of the engine of your vehicle(s) but usually the higher the better.

Voltage – most of the car batteries are 12V but commercial trucks, RVs and machinery can have up to 24V. Check your battery for the voltage.

Cable length – again, depending on the size of the car and the size of the jump starter. With small jump starters, the cable length is usually between 10 and 12? – just to reach both terminals easily but with bigger car jump starters you might want to have longer leads (around 60?) to ensure comfortable and safe operation.

Based on your other needs you might want to check whether the jump starter has an integrated flashlight, USB ports, 12V outlet or a compressor which might save you in other situations.

400 amps is probably enough to start most small to midsize CARS and the smallest of SUVs and trucks. To start “bigger” vehicles you will probably need the 1000 amp unit. The battery for your car is picked out by the engineers so it’s cold cranking amps (CCA) number is bigger than the needed amps to start the engine.

If you drive a hybrid, then it’s typically safe to use a car jump starter, or a regular jump start, on the auxiliary battery. These auxiliary batteries are nominally 12V, just like regular car batteries, but they’re typically much smaller.

That means the main danger associated with hybrids and jump starting is that if you try to use the auxiliary battery in your hybrid to jump someone else’s car, you may end up depleting it to the point where your own vehicle won’t start. It also means that it’s perfectly safe to use a jump starter or portable power pack on that type of battery.

The other type of battery contained in most hybrids uses a different, much higher voltage than the 12V used by conventional cars and trucks. That means you can’t jump start the main batteries in your hybrid with a car jump starter or jumper cables and another car.

Electric cars are similar, but with the added caveat that if you drive an electric car you should never attempt to either provide or receive a jump start. Electric cars are meant to be charged in a very specific manner.

If you drive a regular gas or diesel vehicle, and it has a battery that’s difficult to access, then it may or may not be safe to use a car jump starter. It’s perfectly safe to use one if your vehicle has a remote positive terminal that’s designed for charging and jump starting, but you should never hook up the positive clamp of your portable jump starter to the fuse box or anything else that isn’t actually meant for that purpose.

In some cases, the only safe way to use a portable jump starter is to gain access to the battery and connect directly to the positive terminal.

Depending on where the battery is located, it may then be impossible to make connections to both the positive battery terminal and a clean, unpainted section of the body or frame. This can make it difficult to use a jump box if the included cables are too short. In this type of situation, you may have to use actual jumper cables or a jump starter that has longer cables.

There are two main dangers that are commonly associated with jump-starting a car: damaging delicate components in the electrical system and blowing up the battery. Both of these situations can result from crossing the positive and negative cables or shorting them out by touching the positive and negative leads together.

1. When you use a jump box, the basic method of connecting to the dead battery is the same as when you use jumper cables:

2. Connect the positive jump box cable to the positive terminal on the battery.

3. Connect the negative jump box cable to the engine block or another good ground location.

4. Set the jump box in a stable location in the engine compartment, or on the ground if possible, where it won’t become detached, fall, or interfere with the engine pulleys or fan.

5. Attempt to start the car.

6. Carefully disconnect the negative jump box cable and secure it to the jump box.

7. Carefully disconnect the positive jump box cable and secure it to the jump box.

The jump starter, or booster pack, is a convenient device that acts like the battery of another vehicle and comes equipped with its own alligator clamps to attach to the battery in your car. There are benefits and drawbacks associated with a jump starter. The best thing about it is it eliminates the need for another vehicle and messy jumper cables. If the battery in your car will not turn over the engine, you can hook the jump starter to the battery yourself and (hopefully) get enough peak amps out of the jump starter to “boost” your battery and turn the engine over. Jumper packs range in quality and price ranges. The higher the price, the better the jump starter. Keep in mind that you may not need all the little gadgets that come equipped with the jump starter. Many of these accessories, like a flashlight or portable air compressor, may suck some of the charge from it if you use them. Some jump starters can put out around 1500 peak amps to help boost your battery to turn the starter and get the engine started. The downside to jump starter packs is the fact that they will not charge your battery. If your battery is completely dead or has very low cold cranking amps, your jump starter may not provide the power you need to boost the battery.

• Power inverters are especially useful if you are setting up a solar power system – they convert energy from the sun into electricity you can use to power your gadgets within your vehicle. This is renewable energy that isn’t a drain on your vehicle’s battery.
• Power inverters aren’t just for vehicles – if you have a small cottage or outhouse, they’re very useful for setting up a small power source there.
• Many (but not all) power inverters come with USB outlets, useful for charging on the road without having to cart around adaptors and large plugs. For ease of use, get one compatible with USB.
• The best inverters have digital screens which show you how much energy has been consumed and information about battery voltage. It’s useful to know these things at a glance, so consider getting one that has a screen.
• Modern inverters have been made to be extra-quiet, so you won’t be woken up by a noisy machine while trying to simultaneously get some sleep and charge your phone in your RV.

Besides the sizing, there are two main types of inverter – the modified sine wave, and the pure sine wave.

So, what’s the difference, and which one will you need?

Modified Sine Wave: These tend to be cheaper, and less powerful. However, they’re good for most everyday electronics you will want to use, just not very large ones.

Pure Sine Wave: These are compatible with pretty much all electronics, gadgets, and appliances, and produce a powerful current most like the one supplied by the electric grid. These are the most common choice, because they’re more likely to be compatible with anything you need to plug in.

Like we said, they convert currents to a type safe for use in vehicles. Your vehicle’s battery voltage provides a current that powers its internal workings – you’ll need to know which voltage your vehicle’s battery uses to choose the correct inverter.

The current supplied by a battery sticks on one circuit, in one direction – where the name ‘direct current’ comes from.

However, to power your gadgets, you’ll need alternating current, as those electronics need more power to function than the DC can provide. They’re made to function with the high-voltage AC current supplied in homes.

Power inverters increase the DC voltage, change it to AC, then use it to power your devices. They amp up your battery’s voltage so you can play video games and use a kettle in your RV. Cool, huh?

Basically, they are devices that turn your vehicle battery’s direct current (DC) into alternating current (AC) – the kind of electricity you have in outlets in your house, that are connected to the energy grid.

Having a power converter means you can plug in your appliances and devices, and power them like you would through an electricity outlet in a house.

In your car, you can get USB adaptors for your cigarette lighter so that you can charge your phone or plug in your satnav. But for larger gadgets and electronics with proper plugs, you’ll need an Potek power inverter.