Q1: How long it takes to complete the inner battery charging ?
A : Two day is enough under the sunny weather.
Q2: What is the number of cell phone charges that are possible with
one charge at full capacity?
A: Regular cell phone: about 3 times , 3G cell phone: about 2
hours.
Q3: Can I place the solar panel outside?
A: Yes, this solar panel is waterproof.
Q4: How often shall I replace the rechargeable batteries for solar
power system?
A: About every 2 years.