Top positive review
With a charged battery it's great, but the solar panel on it's own, is only good for charging very low power devices.
on 25 May 2017
You can basically forget about charging the latest, power hungry smart phones directly from the solar panel right now, it's just not powerful enough to do it in the UK climate for all but the sunniest, cloudless skies.
The ONLY viable way to charge a modern smart phone/tablet off this product is to do it off the included battery pack.
If you accept the limitations of solar charging in the UK and regard being able to charge stuff in the few remote places still left in the UK as a bonus when the sun is shining, then I'm sure you won't be disappointed, but it is only a bonus. As for this product to be a genuine alternative to carrying more battery packs you will basically need a clear sky with no cloud cover at all, get that sort of weather and it will charge a low power smart phone, directly from the solar panel, to 100% capacity, in about 4hrs but only a low power, budget type phone. All you Samsung & Apple phone users can forget it.
It's for this reason that I keep two phones on me, a fully charged modern smart phone for internet access, and an old budget one that I know will be chargeable off the solar panel most of the time, even in the UK climate.
Modern smart phones, especially those that have the newer Type C USB connection need more electricity to charge than this solar panel can provide in anything but perfect, sunny weather, if cloud cover interrupts charging then you will need to unplug it and reinsert it for the phone to detect it and start charging again, not much use if a clouds come along every few minutes..right?
The solar panel will trickle charge the battery pack in most conditions though, at peak output in ideal conditions, the solar panel can charge the battery pack at roughly 300mAh an hour, so your looking at a charge time of 30-40hrs for a full 100% charge! I wouldn't like to guess how long it would take in typical UK weather, so ideally you'll aim to keep the battery at 50-60% at all times and top it up as necessary.
Keep that battery charged though and it will charge anything you throw at it. The battery is rated with a 9000mAh capacity, though only about 6000mAh of that is actually usable, which is enough to charge a modern smart phone twice or a large tablet one and a half times.