how long does it take to charge a elf bar

It depends on the power source and the amount of energy needed to charge the battery. Generally, it takes several hours to fully charge an elf bar, but it can vary depending on the size and capacity of the battery. Some devices may have faster charging speeds, while others may take longer. It's also important to remember that the battery will lose some of its charge over time, so it's best to keep it topped up as much as possible.