Anker MagGo Power Bank 10,000mAh - Apple Watch Certified, Compact Portable Charger with Built-in USB-C Cable, 35W Max Fast Charging for iPhone 15, Samsung, iPad, AirPods - Perfect for Travel, Camping & Daily Commute

UPDATE: Anker reached out with top tier customer support. They helped me troubleshoot my slow charging speeds and it’s just that the watch itself is designed to charge at different rates depending on several different factors. They explained it very clearly and in a helpful way and it was enough for me to just keep using it in good faith. I can safely say this thing works pretty well especially by comparing it to other chargers. I tried to use other watch chargers with a wattage read and found they were the same as well with slow charging speeds. After taking this on multiple trips, it will definitely charge your watch in a pinch. I may have just had some errors in my first overnight charge but after putting it through its paces, I went a full 5 days just using this to charge my watch and even my phone once or twice and it saved me packing a two cables or fighting someone for an outlet. Is this worth the full price tag? I’m not exactly sure. I think I found my value out of it. Basically saves you from packing or buying a watch and usb c cable. Plus it has enough capacity to charge my watch several times over. Really no more complaints!Okay so two things here. I bought the other battery which has the same built in cable, but features a wall outlet plug in. Super useful when travelling. No fussing with a power brick or worrying about forgetting it plugged into the hotel wall, but whatever. Then I saw this. I was annoyed because if I had seen this one that has a watch charger built in, I would've scooped this up in a heartbeat! Against my better judgment, I bought this one too and gifted the other charger to my girlfriend. Sadly I did realize that this battery bank doesn't have a wall outlet charger. Not really this thing's fault, it doesn't advertise that it does, but man I just saw the same style battery and thought it did. Bummer. Not a big deal. What IS a big deal is that this thing comes with little circle stickers for you to put on the watch charge to help "stabilize" it. Usually a red flag when a product has a "fix" for an issue, but whatever. I love Anker products. I apply the sticker and plug my phone in. The phone charges at about 20w which I can see because of the neat little digital readout. Super cool. I have one of those cables that reads out the wattage and can confirm, I plugged it in to charge at 30w, battery confirms 30w, and even better yet, it gives an estimate to the battery being full. Very neat!Now for the terrible part. I popped my watch onto the charger....it charges at .8w. That's right. Not the max 5w, not 2w, not even 1w, just .8w. To give you an idea of how "fast" it charges, I put my watch on the charger at around 80%, went to sleep, woke up about 6 hours later to a 94% charged watch. Now I figured, maybe it's because my watch is nearly fully charged. Today I put my watch on there at 10%. Still .8w. I moved it around for a bit and I got up to 2w. Then it'd drop back down to .8w. I took the sticker off, no change, applied a new one, same result. Despite having some cool features, this is a return for me and off to find a replacement!