On eBay, 1pc typically stands for "1 piece" or "1 unit." It is used to indicate that the listing is for a single item or unit of the product being sold. For example, if a seller lists a quantity of 1pc for a particular item, it means that the price listed is for one individual piece of that item. **

It ultimately depends on personal preference and what you would use more often. If you find yourself needing a pen frequently, then a pen would be the more practical choice. However, if you are someone who frequently loses or misplaces keys, then a keychain might be the more useful option. Both items can be functional and stylish accessories, so it's really a matter of what you would get the most use out of. **

No, CR123A batteries are typically not rechargeable. They are usually single-use lithium batteries designed for high-drain devices such as cameras, flashlights, and medical devices. Rechargeable alternatives to CR123A batteries include lithium-ion batteries, which can be recharged multiple times. **

Without further information or context, it is difficult to determine if the keychain is broken. If you can provide more details about the issue with the keychain, such as a description of the damage or malfunction, I would be happy to help assess the situation. **

Instead of using single-use batteries, which contribute to environmental waste, it is better to use rechargeable batteries. Rechargeable batteries can be used multiple times, reducing the amount of waste generated. However, if rechargeable batteries are not available or practical, using standard single-use batteries is still a better option than not using any batteries at all. It's important to consider the environmental impact and choose the most sustainable option whenever possible. **

Goldcap batteries, also known as supercapacitors, are known for their high power density and long cycle life, making them ideal for applications that require frequent and rapid charging and discharging. On the other hand, rechargeable batteries are more commonly used for their energy density and ability to hold a charge for longer periods of time. The choice between goldcap and rechargeable batteries depends on the specific requirements of the application, with goldcap batteries being more suitable for high-power, short-duration applications, while rechargeable batteries are better for longer-lasting power needs. **

The comparison between COB (Cost of Business) and VB (Value of Business) depends on the specific context and perspective. In some cases, the COB may be greater than the VB if the expenses incurred in running the business exceed the value generated. However, in other situations, the VB may be greater than the COB if the business is highly profitable and generates significant value compared to its costs. Ultimately, it is important to analyze both the cost and value aspects of a business to determine its overall performance and sustainability. **

Without a visual inspection, it is difficult to determine if the corn cob is moldy. Mold on corn cobs typically appears as fuzzy patches that can be white, green, blue, or black in color. If you see any of these signs on the corn cob, it is likely moldy and should be discarded. It is always best to err on the side of caution and throw away any corn cob that appears to have mold to avoid potential health risks. **