The China PR70 Zinc Air Battery is a type of primary battery that offers several advantages over other types of batteries. Some of the main advantages of the PR70 include:

1. High energy density: The PR70 has a high energy density, which allows it to store more energy than other types of primary batteries of the same size. This makes it a great choice for devices that require more power or for devices that are used frequently.
2. Cost-effective: The PR70 is relatively inexpensive compared to other types of batteries, making it an economical choice for many applications.
3. Widely available: These batteries are widely available in the market which make it convenient to find and purchase.
4. Long shelf life: The PR70 has a relatively long shelf life, which means it can last for several years without losing its charge. This makes it ideal for devices that are not frequently used.
5. Reliable performance: These batteries are known for their reliable performance and ability to deliver a consistent power output over an extended period of time.

Overall, the China PR70 Zinc Air battery is a reliable, cost-effective and convenient power source for a wide range of electronic devices that require more power than a PR44 and that are not designed for rechargeable batteries, for example medical devices, hearing aids, and some photography equipment.