Brass Knuckle batteries are a battery that uses a metal knuckle to plug into a USB port.
The battery has an 18650-type battery, and it can be used for the same purposes as the rechargeable batteries that power most laptops.
You can use them to charge a smartphone or laptop, and they also charge a PC.
They are also very versatile: they can charge a laptop for about an hour, and then recharge it for another hour or two, which means you can recharge both the laptop and the phone simultaneously.
Brass Knurling is not the only battery out there that uses this type of design.
There are also rechargeable lithium-ion batteries that can be plugged into USB ports to charge other devices.
Brassknuckle batteries use the same principle as a battery, but they are rechargeable instead of rechargeable.
These batteries have an 18-volt battery and can be charged by USB.
This makes them a great choice for a laptop charger that charges all of your devices simultaneously.
You’ll need a 24-volt USB power source to use them.
You could also buy a battery and plug it into your computer or laptop for charging.
BrassKnuckles are currently on sale at Amazon for $49.99.
Brass knuckles are not the cheapest battery available, but you will get much more bang for your buck if you buy them.