DEWBU Power Bank 12V Battery with Intelligent Led Display Battery Charger for Heated Jacket, Outdoor Electric Heating Coat, iPhone, iPad, Samsung Galaxy, Android, and Other Smart Devices

The 12v output of this power bank is a real boon. Both the 4X1.7mm barrel socket and the USB-C can provide 12 volts - 18w in the case of the barrel socket and an impressive 36w from the USB. I use this to power an astronomical telescope, which it does effortlessly. The "Charge Remaining" LED readout is a big plus.

Second spare battery I bought first one brilliant log battery life unfortunately this one did not hold charge. I was returned. Have received another one. What works fine.

Very good

When fully charged good life time just Wish I could charge my phone from it too

over priced for 5000mah battry

I bought this for my Milwaukee M12 heated Toughshell jacket and can confirm it works great, BUT you do need a separate 2.1mm male to 5.5mm female adapter (I bought a right angle one on Amazon that works perfectly). That said, highly recommend this battery: * Flat shape is MUCH more comfortable to wear in the jacket, easy to forget it’s even there compared to an M12 battery pack. * Percentage of battery life display is very helpful for deciding when to recharge. * Battery life / heat time is very good. Really the only minor negative I have found over a few months of regular use, is that the battery goes into a sleep / hibernate mode if something is plugged in and not pulling current. You can’t turn on the jacket while it’s plugged in unless you press the battery button first to wake it up. However, that also helps avoid phantom draining of the battery and in practice I’ve found it very easy to hit the button with my left hand through the material of the jacket without taking it off. It only takes a second and I very quickly got used to doing it as soon as I put my jacket on. All in all this has been a great add-on for my jacket and 100% worth it for the comfort factor alone over an M12 battery brick sticking into my kidney. I wish it was a little bit less expensive because I would like to pick up a second one as a backup battery, but it’s a somewhat niche product and I can understand the higher price point over battery packs that don’t offer 12V out (or charge status displays for that matter).

Works great as a spare battery.

Excellent

Bought this battery to have a backup for the Dewbu heated jacket I'd purchased my mom earlier in the year. She's a tiny lady in her 50s and is constantly cold, she loves the jacket so much she wears it all day at school to stay warm. The battery the jacket came with lasts all day on low but then you have to recharge it. With this extra she can bring it with her and run her jacket hotter if she wants since there's a backup ready. No need to wait for one to finish charging if you have a spare! Works great and works with the jacket which is just what we wanted. Very happy it does what it does!

I Ordered this for a Spare for my Heated camo Dewbu coat and it will not charge ? So they are sending me a new battery and I've shipped the other one back Dewbu seems to be a Good Company they was spot on they got a new one sent fast I would Definitely order from them again