There are a few important things to consider when buying a solar flashlight. Here is a quick checklist: 1. Solar panel The efficiency of a solar panel plays a decisive role in the performance of a solar charger. If you want a portable solar charger with higher efficiency, you can choose a thin film solar panel, but the price is usually high. The more common is monocrystalline silicon and polycrystalline silicon solar panels. 2. Battery capacity The larger the capacity of the solar energy storage battery, the longer it will take to charge your electronic device. The higher the capacity of the battery, the larger the capacity of the solar panel, which is a good choice for users who need to charge in more complex outdoor environments. However, the larger the capacity of the battery, the heavier the portable solar charger. 3. Solar charger interface There are usually 2 types of power interfaces, one is the DC output interface, and the other is the AC output interface. It is mainly used for charging the mobile phone. The DC output interface can be used for charging devices such as drones and laptops. The AC output interface can be used for devices such as hair dryers, which can be used for multiple devices and have multiple charging modes. 4. Charging speed Different devices have different charging speeds. Therefore, we usually recommend that everyone choose the one with the higher charging power when choosing a solar charging light. How to Choose a Solar Charger That Fits Your Needs When choosing a solar charger that suits your needs, you need to think about what you are going to use it for. The size, power, and other factors should be considered. For example, if you are just using it to charge your phone while traveling, you can choose a small one. But if you need to use it in more complex outdoor environments, you need to choose a larger one that has a longer charging time and larger capacity. In addition, the solar charger with a larger capacity can also be used as a camping stove, so you don’t need to worry about buying a solar charger with a large capacity. In fact, you can choose one that is large enough. How to Use a Solar Charger 1. Charge the battery with a charger. The solar panel and the battery should be connected with the provided connecting line. Turn on the battery switch, and when the voltage indicator is stable, you can start charging. The charging time is related to the ambient temperature. The higher the ambient temperature, the longer the charging time. 2. Check the output voltage and current of the charger. Use a multimeter to measure the output voltage and current of the charger. If the charging voltage is not constant or there is an error, the charger may not work properly. 3. Check the performance of the solar charger. Turn on the solar charger and let the solar panel face the sunlight. If the charging indicator light of the solar charger is on, it indicates that the solar charger is working normally. 4. Check the charging time and capacity of the battery. You can use a multimeter to measure the voltage and current of the battery to check the charging time and capacity of the battery. If the charging voltage is not constant or there is an error, the battery may not work properly. 5. Check whether the charging power is stable. You can use a multimeter to measure the charging power of the solar charger. If the charging power is unstable or there is an error, the solar charger may not work properly. 6. Check whether the charging performance is stable. You can use a multimeter to measure the charging performance of the solar charger. If the charging performance is not stable or there is an error, the solar charger may not work properly. Why Choose to Buy Solar Flashlight? The first is that solar power is an inexhaustible clean energy source. Solar chargers are suitable for charging various electronic devices. As long as you put it in the sun, you can get energy. It can work in the sun during the day and recharge at night. You don't have to worry about it running out of power. The second is that solar power is a green and pollution-free energy source. It is an environmentally friendly and energy-saving product, and it will not pollute the environment. See more details about solar flashlight in AliExpress Video Page.