The built-in smart charging technology can provide optimal and 100% safe charging in direct sunlight. -- By Wirecutter Editor. This product has 4 piece panel, each is 7w, so the power is 4 7w=28W; Theoretical output is 5V/2.4A Max for each port, 5V/4.8A Max in total, the total theoretical power is 5V 4.8A=24W Max.
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