AlpsWolf Rechargeable Flashlight, LED Spotlight Flashlight 20000 Capacity 4000LM 25h Ultra-Long Standby 3+4 Lights Modes Ultra Bright Flashlight Waterproof with USB Output as a Power Bank

It's good but it's does not have warranty .it take less time to charge

I have "real" 4000LM flashlights. This is not near that, more like half that when compared side by side.Fully charged I got 5 hours on HIGH (grid LED side). Then I measured the mAh rating from dead to full charge, took 10 hours to charge and the battery in mine is only about 9000mAh. not 15000mAh like I was told.Built quality is good enough for a house in case of emergencies. Plastic build doesn't inspire confidence to use in a shop.So not as bright as expected and battery capacity is almost half of what is advertised. I'm keeping it because because at the end of the day, 5 hours on high is one of the longer lasting flashlights I own and some light is better than no light.

BEST RESOURCEFUL ALL AROUND LIGHT... I WISH THESE WERE INVENTED YEARS/DECADES AGO. Think about it, Camping/Hiking at dusk to nitefall and the lead person has the flashlight... doesn’t help the people or children walking behind the ‘only’ person with a light source, does it? Both lights click on, ‘brightness’ front and back... problem solved. “THIS” is my go-to flashlight... If I’ve misplaced it outside somewhere, I go nuts, like misplacing your phone, or purse... I need to attach a Tile-Mate or key finder to it LOL. Can’t say enough good things about this ALPSWOLF... and the distance ahead? Up in the trees, far out into the field. Yes, quite impressive. The only downside, but really isn’t BECAUSE, You can even devise a shoulder strap (loops on handle) so your hands are free... when you look at the price, seems expensive? As many times as I’ve resourced to using it, for all sorts of things... battery life? Impressive... durability? Impressive... it’s worth every penny.

Got this for myself for my B-Day. Was shocked by how light it was, kind of thought that I’d been had by the marketing department. This light is surprising. In both spot and flood it is bright and well thought out. It’s no carbon arc search light but it keeps a fairly tight beam over 200yds. The flood light does just that, it will dump light into an area/room/pathway in ridiculous amounts. Battery life is more than adequate for a flashlight, I charged my tablet with it, almost to full charge while watching a movie. This light impresses me. I think I’m going to have to get a second one for my truck, the red and blue flashing warning lights would be good for the roadside. Hope this helps.It is now 7+ months later and I still love this light! The battery is holding up well after several night fishing trips both in the boat and on the river bank. Works great on the side of the road in “red and blue” mode, just don’t set it in or on your vehicle. Place it on the road surface, so the police don’t have anything that they can complain about. But overall this thing is the cats ass! I will be ordering at least two more for my kids cars. They are that good!

Okay, this will be a long post. Here is the short version.Works as expected for price, they "lie" about capacity.I just bought this light after a big power outage. I have about 10-15 other powerbank/flashlight devices, and just wanted one I could give to folks that I didn't mind if they broke.Upon arrival, it didn't work. No buttons worked in any way. I figured it wasn't charged, so I plugged it in. One light then worked, the other didn't, and battery showed as full. I figured the capacity lights didnt work while charging and left it for an hour.Unplugged it, no light. The power cells inside were clearly not connected. I had started a return process when I decided hey, I'm a technician, I work with controls and wiring, let me try and fix it.I took it apart, and the mounting bracket for the power cells was broken. They were ziptied to it, so this let tge battery sag. The result being that the wires got pulled off of the PCB. This is terrifying, because if they shorted in transit or at my house, the lithium cells could have caught fire. There is no battery management system after that solder connection, so that was very bad.I resoldered the connection, used epoxy and a 3d printed brace to firmly reattach the power cells, and now it works great.The problem with it was almost certainly caused during transit, so I can't fault the product too much, but there are several simple things that would have prevented this issue.#1 Use a stronger attachment method for the battery. That thin piece of plastic cannot support the cells.#2 Instead of a surface solder for the wires leading to the battery, arguably the most important wires, use a PCB passthrough hole. This would allow a FAR stronger connection.Now, for the Lie.The product description clearly states there are 3 cells. Mine only has 2. If I had the 3rd cell as it was supposed to, that would be an additional 50% capacity than what I have now. Granted, 32650 cells are theoretically 7500 mah, so 2*7500=15,000 checks out. Actually capacity seems lower than this rated amount, but not any less than I expected.I canceled the refund as I have fixed my product, and it is basically what I expected, minus a small drop in capacity, which doesn't bother me.Lights work well, brightness is roughly as expected (but I expected less than rated, as companies love to use "theoretical capacity and performance") I have a several hundred dollar light and powerbank alternative with a 2500 lumen light which is roughly as bright.I didn't check if the cells were wired in parallel or series, if they were in series then the 3rd missing cell might account for the drop in lumens, but I doubt it.Summary: rush shipping damaged product, design flaws allowed damage, power cell count is incorrect but theoretical capacity is correct. Lumens appears to be lower than claimed, but I don't have any accurate light sensors to determine for sure, and my power cells could have shorted during transit damaging them, resulting in lower voltage and thus lower lumens. Can't claim it will be the same brightness for you.I'm reasonably happy with the purchase, since I was able to fix it.

Oh god, I really thought that this was a pretty sturdy/good material/quality but NO, it's really feel so cheap, so WEAK material. And, The brightness is okI'm not amazed, and the battery life only last 30min. I can't even charge a phone.