Remember that makes sure that the peak power supplied by photocell is not less than 1.2W. For example, if you choose a solar gadget with 3.7V/12000mAh battery and 1W peak power, it will spend you at least 44 hours to charge your solar battery completely in sunlight. About output power, there is a direct correlation between size and output. Power ranges from 10 to 30 watts. For example, a 25 Watt solar panel will completely charge the 400Wh internal battery providing up to 6 hours of run time for a 25 Watt Laptop while 5-6 hours of sun will charge the battery halfway for 3 hours of run time.
Find a Balance between Portability and Power
When looking for a solar powered panel for your laptop, size is a huge concern. No person wants to take a big and heavy solar power panel when traveling. Yet, you need to make a balance between portability and power. When you use your notebook for very little time, just choose a solar panel without internal batter. And if you need a powerful solar charger, a solar gadget with build in the battery is a fine solution.
Compatibility and Safety Protection
Solar battery panel can work with almost all of laptops such as HP, ACER, SONY and etc. Even so, maybe there is a compatibility problem with Dell laptop charging connection. Right now there are many issues about the laptops not recognizing the supply. Dell is the only OEM to use the signal. Abuse of the power cord can result in a broken signal lead.
Therefore, before you buy a charger, retain in mind that require for the compatibility issues. As safety protection, make sure extra electricity is never sent to your electronic devices, and short circuit protection-- to protect your electronics when accidentally connected with an incompatible adapter tip. Only choose a charger with overload protection and short circuit protection safety features.