7.2 Volt NiCd and NiMH battery packs are two common types of rechargeable batteries. Both have their own advantages and disadvantages that must be considered before making a decision on which to use.

7.2 Volt NiCd battery packs use nickel and cadmium as their primary components. They have been in use for many years and are known for their high output power, good reliability, and long cycle life. They are ideal for high-drain applications like power tools as they can deliver high current without losing their capacity. They can also be recharged quickly, which makes them convenient for those who need to use their devices frequently. However, they have some drawbacks, such as the memory effect, which may cause them to lose their capacity if not fully discharged before recharging. Additionally, they contain cadmium, which is a toxic substance that can harm the environment if not disposed of properly.

7.2 Volt NiMH battery packs, on the other hand, use nickel and metal hydride as their primary components. They are similar to NiCd batteries in many ways but are considered to be more environmentally friendly since they do not contain cadmium. They are known for their high capacity and long cycle life. They are ideal for applications that require a lot of power as they can hold more energy than NiCd batteries of the same size. They also do not suffer from the memory effect, which makes them more reliable over time. However, they tend to lose their charge more quickly than NiCd batteries, which makes them less useful for devices that are used infrequently. They are also not as good at delivering high current as NiCd batteries, which makes them less ideal for power tools or other high-drain applications.

When choosing between 7.2 volt NiCd and NiMH battery packs, several factors must be considered. If a high-drain application such as a power tool is needed, then a NiCd battery pack may be the better choice. NiCd batteries are also better for frequently used devices since they can be recharged quickly and do not suffer from the memory effect. However, if a device requires a lot of power but is not used as frequently, then a NiMH battery pack may be the better choice. They have a higher capacity than NiCd batteries of the same size, which makes them better for applications that require a lot of energy. They also do not contain cadmium, which makes them better for the environment.

Ultimately, the choice between 7.2 Volt NiCd and NiMH battery packs depends on specific needs and requirements. Both types of batteries have unique benefits and limitations, and it is essential to weigh them carefully before making a decision. By choosing the right battery pack, device owners can ensure that their devices will perform reliably and efficiently for years to come.