Yes, a solar panel can charge a portable battery. Solar panels generate electricity from sunlight through the photovoltaic effect. This electricity can be stored in a battery bank for solar panels like Anker portable power stations, and then be used to power a portable battery or other electric devices and appliances. This makes solar panels a convenient and sustainable solution for charging on the go, especially in outdoor or off-grid situations.

Lithium-ion batteries, especially those LiFePO4 batteries used in Anker Solar Generator 767 or Anker Solar Generator 757 are considered the best option for solar panels due to their high energy density, deep cycling capability, longer lifespan, higher efficiency, low self-discharge rate, and maintenance-free operation. They offer a compact and lightweight solution for storing solar energy, maximizing the benefits of your solar panel and battery bank. Comparatively speaking, lead-acid or other types of solar panel battery banks are somewhat less superior.

The lifespan of a portable solar battery like Anker portable power stations depends on several factors like the quality of the battery, frequency of use, and maintenance. On average, a well-maintained portable solar battery can last between 5 to 15 years. It's recommended to check the specific specifications and warranty information provided by the manufacturer for a more accurate estimation of the battery's lifespan. However, regular maintenance, proper storage, and following manufacturer guidelines can help extend the lifespan of a portable solar battery.

Solar battery packs can be worth it depending on your needs and circumstances. They offer several benefits, such as storing excess solar energy for use during cloudy days or at night, providing backup power during outages, and enabling portable and off-grid charging. In addition, solar panels and battery banks are particularly useful for camping, outdoor activities, and emergency situations by providing portable and sufficient power.

However, please also consider the cost of the battery pack, your energy requirements, and the availability of reliable grid power. Assessing your specific needs and comparing the costs and benefits will help determine if a solar battery pack is worth it for you.