Luckily, if you are indoors, there is no need to use a solar charger, and it cannot be used. It's okay if you go out in a sunny place, but the charging speed will be slower than a fast-charging power bank. If the sunlight intensity is not strong, it will be even slower, which is more suitable for outdoor emergency use.
Some people tested it with 5S mobile phone and Glorysolar 6.5W solar charger. The sunlight intensity is moderate and it takes 3-4 hours to fully charge. The 5S has a smaller capacity. phones may take longer to charge, if you want to charge faster, you can only choose a more powerful solar panel.
Solar chargers are generally used in emergencies. They contain solar panel + boost circuit + battery core. If you want to usesolar power to fully charge the battery core, you will probably need to put it in the sun. . It will take 3 or 5 days. If you need to use it frequently, use a 220V charger to fully charge the solar energy, so you can use it at any time.
Battery cells of this type. Chargers are generally not very good. The battery is the same as that of a copied cell phone. If it is used frequently, it can only be used 200 or 300 times.