1.Working principle of hand generator:

Hand chargers work in exactly the same way as wind turbines or hydroelectric DAMS, although on a much smaller scale, both generate electricity by turning the turbine to cut magnetic field lines.
These turbines have been connected to a rechargeable battery, so that the electricity generated is not wasted, stored by the rechargeable battery, and then passed through the battery to power your electronic devices.

2.The main differences between hand chargers and solar panels:

Hand chargers were born long before solar panels and have been used to charge battery packs for many years. If you don't have a battery to store the electricity, it's relatively difficult and impractical to use a hand-cranking generator to supply power directly. Solar energy, on the other hand, is useful for people who can get a few hours of sunlight each day. With enough power, you'll be able to power and charge a variety of devices at the same time.

Below, let's look at the five main differences between the two tools:

1. Hand power chargers usually have add-ons, such as a radio or clock. This is because they are often used for survival purposes, or by people living in very remote areas, just imagine, without cell phone coverage, radios would be an important part of life.

2. Solar power generation does not require any physical strength, and unlike hand systems, solar panels simply need to be placed in the right position. The only thing required is to move the solar panel to ensure that it is as perpendicular to the sunlight as possible in order to get the best power generation efficiency.

3. The hand charger does not require any fuel source except for the action of the handle rotation. You can use them on sunny, rainy or snowy days, and sunlight is not a factor.

4. Solar panels can be used continuously as long as the sun comes out. If you have a solar charger that includes a battery pack, you don't have to worry about running out of power as long as there is sunlight. The hand charger needs to be continuously turned for a long time every day.

5. Portable solar panels are generally lighter than hand chargers, so they are more suitable for backpacking and camping.

3.Advantages and disadvantages of hand generator:

1.Advantages of hand generator:

The biggest advantage of the hand charger is that it does not need to consider the weather, does not need sunlight, no matter where you go, it can be used, all you need to do is constantly use the hand crank, the battery pack is constantly charged.

Another point is that the hand generator currently on the market generally integrates radio, flashlight and other functions, which will play a role in emergency situations.

At present, the newly designed hand generator on the market generally contains a rechargeable power supply below 1000mAh, which can charge your mobile phone and other devices directly through the USB cable without the need for a converter.

There are at least two ways to charge the rechargeable source: USB charging and hand charging.

2.Disadvantages of hand generator:

If you use a hand charger often, you will feel exhausted after a while.

This is also the main complaint of users, for some people, this low level of power generation efficiency may not be worth it.

Especially when considering the relatively large power consumption of some electronic devices, manual power generation may not be the best choice.

The capacity of the battery pack inside the hand charger is very limited, because you can't generate high power through hand movements, which is unlike a windmill or hydroelectric power generation, you don't have enough strength and endurance to maintain a stable charge.

Integrated radio, flashlight and other functions of the hand charger, for availability considerations, they must have a battery pack, so they are generally heavier than solar panels, which makes backpacking and other outdoor activities, increased weight.

4. Advantages and disadvantages of portable solar panels:

1.portable solar panel advantages:

In the past few years, portable solar panels seem to have become the darling of camping and hiking, they are more reliable, durable, and efficient than ever before, and photoelectric conversion efficiency is constantly improving, but the cost is constantly falling, which is undoubtedly a popular and mature technology sign.The biggest advantage of portable solar panels is that as long as they are in the sun, you don't have to worry about it.You can also hang portable solar panels on the back of your backpack while hiking, so you can get power while walking.Due to their very compact design, some also feature foldable flexible thin-film solar materials, making them easier to carry.In addition, portable solar cells are lightweight, durable, and do not overheat.

2,.portable solar panel disadvantages:

Solar chargers have their limitations, and the amount of power they generate and the strength of the current largely depend on the surrounding weather conditions.They don't generate electricity at night and are much less efficient on overcast or cloudy days.Of course, some solar panels are designed to use ultraviolet light passing through clouds, but even then, on a rainy day, only about 20 percent of the maximum power generation can be obtained.

5. How to choose:

Hand generator and portable solar panels, they are excellent survival tools, each has advantages and disadvantages, as for how to choose, the key depends on the actual use of the environment.Solar panels are better if you have access to sunlight throughout the day, while a hand power charger is more practical as a survival emergency reserve if you are indoors.For a long time walking, crossing, most people will choose portable solar panels, many portable solar panels designed for outdoor, designed to be strong, durable, dust, shock, waterproof, very suitable for outdoor daily power supply and emergency situations.Of course, in outdoor activities where you do not need to consider weight, having both devices prepared is also a more secure preparation.The hand charger is more commonly used for weak current electronic equipment power supply, suitable for emergency power use, for your family to prepare this integrated radio, flashlight hand charger, in natural disasters, wars, unrest, etc., you can better understand the latest weather changes in the region and related risk information.