Hiluckey Solar Charger 25000mAh, Outdoor USB C Portable Power Bank with 4 Solar Panels, 3A Fast Charge External Battery Pack with 3 USB Outputs Compatible with Smartphones, Tablets, etc.

Got mine today. It looks good. There is no hook to hang on a backpack so some of the pictures are misleading, but the snap is on a loop so the loop can be used with some type of hook to hang it. It’s not in the center, it’s by a corner, so it won’t hang straight down as if the loop were centered.I put it in the sun and the lights show the correct indications of it charging. All of the led lights are fine, there are 4 blue and 1 green. It can take up to 50 hours to charge by sunlight, so six 8 hour days plus 2 more hours. Using that info, I figured that 25000 mah (this power bank’s capacity)/50 hrs = 500 mah per hour recharge by sunshine. So 8 hours of sunshine = 4000 mah, enough to fully charge my phone from 0 to 100%. And it should recharge my phone 7 times, from 0 to 100%, on a full battery. Have not tested this in any way, just using the numbers given on this page.Most of the negative reviews are because of slow solar charging. Those people did not do their research before buying and did not have realistic expectations. Small solar panels like these are slow to recharge the power bank. That’s normal. All small, portable power banks will have this issue. This solar power bank has four solar panels, so it will recharge four times faster than a power bank with just one solar panel. It will take longer or shorter depending on the capacity of the power bank, larger capacity takes longer to fill. Charging through glass greatly reduces efficiency, slowing the process further.Find out the capacity of your phone, tablet, and other devices you want to use with this power bank to decide if it will work for you (I had to look the information up online). Maybe you need to buy a couple of them. That might be a better choice than buying a higher capacity power bank because it will give you double the solar panels, so double the recharging speed. Say you have a partner and you want to be able to recharge both your phones. This power bank will charge both your phones a few times, BUT recharging it with the sun will be one phone’s mAh per day. So, if you buy two of these solar power banks, you can set BOTH in the sun for the same 8 hours, getting double the benefit: two phones’ worth of charge in the same 8 hours.The purpose for getting the solar power bank is so that when there is no electricity to plug your phone into, and no electricity to plug the power bank into, there is another way to capture the desired energy. It’s slow, but it works in a circumstance when you would otherwise have no way to recharge. I got mine for after hurricanes when the power might be out for a week or more.I also see reviews complaining that the power bank stops working after a while. Other power banks have the same complaint, so it’s not specific to this one. I read up on why power banks might fail, and reread the owner’s manual. I wrote a maintenance list for myself, and put it with the power bank. I set myself reminders on my calendar to recharge it every other month. If followed, there should be no problems, based what I’ve read. This is not from experience. Yet.1. Unplug cables when not in use.2. Do not leave outside overnight.3. Do not leave in hot car.4. Recharge at least every 3 months.5. Do not allow full discharge.6. Temperature range: 32 deg. to 113 deg.7. Do not get very wet.8. Do not drop.9. Do not scratch solar panels.It came partially charged. It says to fully charge before use and every three months to maintain battery life. It also says not to leave in the hot car because the heat can damage it. Also, it’s not fully waterproof, it’s water resistant. Don’t drop it in a bucket of water.The added flashlight is a great bonus. But the charger can’t be set up to shine anywhere, you’d have to prop it up with other stuff. Good for when you’re holding it in your hand., not so good for setting on a table.I plugged the power bank in and fully charged it, then I used it with my regular phone charging cable to charge my phone. My phone battery was on 88%. It charged to 100% within 20 minutes, which is the same speed as every day when I recharge it. It’s also working fine charging my tablet.In the future, if I have problems, I will come back and post them here.