Cordless impact drivers utilize rechargeable batteries to power the tool. These batteries are made from different materials which make up the different types of rechargeable batteries available on Wrenchadviser site.
There are 3 common types of batteries found in cordless impact drivers
- Nickel Cadmium (NiCd)
- Nickel-metal hydride (NiMH)
- Lithium-ion (Li-Ion)
Nickel Cadmium Batteries
It is said that the first batteries used in cordless impact drivers were made from Nickel Cadmium. Over the years, advancements in battery technology have made this type of batteries used less often.
- They cost less than Li-Ion and NiMH batteries.
- They perform well in cold temperatures so they can be used in cold weather.
- If NiCd batteries are well taken care of, they last longer than Li-Ion and NiMH batteries.
- They suffer from memory effect.
- Cadmium is a very toxic material so disposing of these batteries requires special care and professional assistance.
- They weigh more than other batteries of the same voltage. They can add significant weight to the cordless impact driver.
Nickel-metal hydride (NiMH)
After the NiCd batteries came the Nickel-metal hydride batteries. Manufacturers claim that the NiMH batteries have a larger capacity and longer service life than the other batteries.
- These batteries are the most environmental friendly batteries available. They contain only mild toxins making them safe for the environment.
- NiMH batteries weigh less than Nickel Cadmium batteries of the same voltage.
- These batteries do not work well in cold temperatures. If you might use your tool in cold weather, avoid NiMH batteries because they perform worse than Li-Ion and NiCd in cold weather.
- They have the shortest run time when compared to the other batteries.
- They cost more than NiCd batteries.
Say hello to the newest technology in battery evolution. They are made from Lithium, which is a very light metal. No wonder most rechargeable batteries in the world today are Lithium-ion.
- Lithium-ion batteries are environmental friendly.
- They do not suffer from memory effect like Nickel Cadmium batteries.
- They perform well in cold temperatures so they can be used in cold weather without fear of electrocution or mishap.
- When comparing the weight of NiCd, NiMH and Li-Ion batteries of the same voltage, Li-Ion batteries weigh the least; the preferred for a handheld tool.
- Compared to NiCd and NiMH batteries of the same voltage, Li-Ion batteries have the shortest battery life.
- When explode to high temperatures, Lithium-ion batteries might explode and cause an accident.
- They cost more than NiCd and NiMH batteries.