Lixada 10W High Power Paper Shaped Mini Portable Monocrystalline Silicon Solar Panel Charger USB Port for Cell Phone Camping Riding Climbing Travel Outdoor Activity

I think I've been through three of these. They've worked for about as many days before the socket fails.

The panel is very lightweight.Charging power is of course less than stated, but usable enough.I took this panel on a 50 mi hike and used it to charge a power bank that I used to charge other devices at night. I doubt it charged my power bank more than 30% of capacity during the trip, but the weight of the solar panel was less than carrying a 30% larger battery and it was nice to know that if there was an emergency I could use the panel to charge up even more by leaving directly in the sun rather than hanging on my pack.If I could change anything I would ask for slightly more rigidity to the panel and a higher quality more durable mount of the charge controller. This will break easily if not babied.

This is not a 10W panel. This might not even be a 5W panel. Measurements taken with panel perpendicular to Sun in Toronto, ON, Canada, mid-September at roughly 10:30AM EST, clear skies. Relatively favourable conditions and only 2.3W measured max output (2.07W in photo).If you were going to use this for camping, I wouldn't expect any better than this. Most phone batteries are 10-20 watt-hours, (2W output for 10hrs would give you 20). You'll lose 10-20% efficiency going from the battery bank to the phone, so you would need 8-10hrs of perfect sun (and angle the panel at the sun) to fully charge a phone every day, for example.If you shift the angle of the panel, power output drops dramatically, so if you hang this off your pack, you'll likely get less output as angle changes to less than perfect (perpendicular to Sun).I think it would be optimistic to expect 15 watt-hours out of this every day (assuming you have sunny conditions all day) if you're attaching this to a pack. You're gonna need to do some math if you want to depend on this out in the wild.

I purchased but not effective...try to with cell phone, Battery bank....but in 2-3 hrs ...not satisfied.Then try to return as per Amazon policy....but no one to pickup..So not solution

This works great attached to my backpack. It’s light as anything and charges my power bank back up to full every day. I have only had it in fine weather but has been fantastic so far. Would recommend

I bought this for backpacking. I have only tested it at home so far. No, it does not charge at the advertised rate but frankly for the price, I didn't expect it to. I was able to charge a 10000 MAH battery to full charge in 4 hours or less. I didn't check on it between when I set it out and 4 hours later. Honestly, I was surprised to find it full. It was charging at 3.5W or so. Good enough for me for 5 ounces!! I did weigh it.