What are Nickel-Cadmium Batteries?
Nickel-Cadmium (NiCd) batteries were once common in portable electronics but have largely been phased out due to environmental concerns and performance limitations. They suffered from significant memory effect, where partial discharge cycles could reduce effective capacity. They also contained toxic cadmium, creating disposal challenges.
While no longer common in new mobile devices, understanding legacy battery technologies like NiCd helps when supporting older equipment.