How much charge does the solar panel actually add?

Dunning states that 7–8 hours of sunlight adds about 20–30% to an iPhone. Treat the panel as an emergency top-up, not a way to refill the battery.

How many times can it charge a phone?

The 4000mAh capacity is about one full charge for a typical phone, and less after conversion losses. Expect a partial charge rather than several refills.

Does it support fast charging?

No. Both outputs are 5V/1A, so charging is slow compared with USB-C Power Delivery packs. It will top up a phone gradually.

What comes in the box?

A Micro USB charging cable and a user guide, in a standard white box. No wall adapter is included.

Can it charge two devices at once?

Yes. It has two 5V/1A outputs, so two phones or a phone and earbuds can charge together, each at 1A.

Is the battery safe to leave in a hot car?

It is UL certified, but heat degrades any lithium-polymer cell and the solar panel needs light to work. Avoid leaving it on a dashboard in direct sun.