Car Battery Accessories Available here. When you are in the market for car battery accessories, check out our emergency power-pack with a micro USB port. It’s USB and micro USB ports make it ideally suitable for charging smartphones, tablets and any other device that has a 5V recharge capability. It’s also ready to use right out of the box, because it comes fully charged. Just plug in your device and you’re good to go. And, when night falls, you can you the installed torch to find the car keys you dropped in the drive. Of all the car battery accessories on the market, this is the one that should be in your car.