The TI-84 Plus series of graphing calculators utilizes a rechargeable battery, typically a nickel-metal hydride (NiMH) or lithium-ion battery, depending on the specific model. Connecting the calculator to a power source replenishes this battery, allowing for continued operation. The included USB cable, connected to a computer’s USB port or a compatible wall adapter, serves as the conduit for this charging process.
Maintaining a fully charged battery is essential for uninterrupted use during exams, classroom activities, and extended study sessions. A reliable power source eliminates the need for battery replacements, contributing to cost savings and environmental responsibility. Early graphing calculators often relied on disposable batteries, posing both a financial burden and an environmental concern. Rechargeable batteries, as implemented in the TI-84 Plus series, represent a significant advancement in practicality and sustainability.