BIAL 12000mAh 5V 2.4A Heated Vest Battery Pack, Power Bank for Heated Vest/Heated Jacket,5v Rechargeable Battery Pack for USB Heated Clothes, Heated Blanket, Jacket, Sleeping Bag,Phone

This battery definitely last longer than the 10000mAh battery that came with my heated vest. It is only slightly larger than the original one--but lasts longer. It does take a little longer to recharge as well. I wish they would come out with a quick charging battery since all the batteries I use with my vest take almost twice as long to recharge versus the time they last.

I got a heated vest a few months back and finally started to bust it out and put it to use and this spare battery is a life-saver.The battery that the vest came with is already fairly long-lasting, but this battery is great since not only does it last-longer, but it's also a lot more compact than the vest's original power bank. So I've been using both the vest's original power bank and then switching over to this spare battery when necessary.