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This is a 20,000 mAh Li-ion battery. As for the heater vest, this has more to do with how the heater vest charges, and how much power is required to charge it.
Sorry, there was a problem. Please try again later.I don't know if it will work with a heater vest. I image it will work with it if it has a usb, micro usb, or a usb-c port
Sorry, there was a problem. Please try again later.I have seen other battery charger/banks that swear they have 15,000 or 20,000. I think those are crap. This is TRUE 20,000. I got loads of charging of multiple devices. This is one of the best I've seen
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