Calculate the estimated battery life and storage capacity for your TI-84 Plus CE Black Edition.
Estimated Performance Metrics
— days
Estimated days of use before recharge.
— MB
Estimated free storage space (out of 3.5 MB). Note: OS and pre-installed apps consume significant space.
Understanding Your TI-84 Plus CE Black Edition Performance
The Texas Instruments TI-84 Plus CE Black Edition is a powerful graphing calculator designed for students and educators. Its performance, particularly battery life and usable storage, is influenced by several factors related to how it's used. This calculator provides estimated metrics based on typical usage patterns.
Battery Life Estimation
The TI-84 Plus CE features a rechargeable lithium-ion battery, a significant upgrade from older models. The estimated battery life depends on:
Daily Usage (Hours): More active use drains the battery faster.
Screen Brightness: The backlit color screen is a major power consumer. Higher brightness settings will reduce battery life.
Graphics and Calculations: Drawing complex graphs, running programs, and performing intensive calculations require more power than simple arithmetic.
Session Duration: Longer periods of continuous use contribute to higher daily power consumption.
The calculation models a simplified energy consumption based on these inputs. It assumes a baseline battery capacity and adjusts it based on usage intensity. Note that actual battery life can vary significantly due to the age of the battery, environmental conditions, and specific functions being used.
Storage Capacity
The TI-84 Plus CE offers approximately 3.5 MB of user-accessible memory. However, a substantial portion of this is used by the operating system, built-in applications, and system files. The remaining storage is available for users to install additional applications (apps), store programs, and save data.
Number of Apps Installed: Each app consumes a certain amount of storage space.
This calculator provides a rough estimate of free storage. It subtracts a typical amount consumed by the OS and core functions from the total available storage, then accounts for the space taken by installed applications.
Disclaimer: These are estimations. Actual performance may vary. For precise technical specifications and usage guidelines, please refer to the official Texas Instruments documentation for the TI-84 Plus CE.
function calculateTIEnergyAndStorage() {
var usageHoursPerDay = parseFloat(document.getElementById("usageHoursPerDay").value);
var screenBrightness = parseInt(document.getElementById("screenBrightness").value);
var numAppsInstalled = parseInt(document.getElementById("numAppsInstalled").value);
var numGraphsDrawnPerSession = parseInt(document.getElementById("numGraphsDrawnPerSession").value);
var sessionDurationMinutes = parseFloat(document.getElementById("sessionDurationMinutes").value);
var batteryCapacityHours = 60; // Baseline theoretical full charge in hours of moderate use
var totalAvailableStorageMB = 3.5;
var osStorageConsumptionMB = 2.5; // Estimated storage used by OS and core functions
var estimatedBatteryLifeDays = 0;
var estimatedStorageFreeMB = 0;
// — Battery Life Calculation —
if (!isNaN(usageHoursPerDay) && usageHoursPerDay > 0) {
var brightnessFactor = (screenBrightness / 10) * 0.5; // Higher brightness increases drain
var usageFactor = (usageHoursPerDay / 2) * 1.2; // More hours increases drain
var calculationFactor = usageFactor + brightnessFactor;
// Adjustments for intensive operations
calculationFactor += (numGraphsDrawnPerSession / 5) * 0.3; // More graphs increase drain
calculationFactor += (sessionDurationMinutes / 30) * 0.1; // Longer sessions increase drain
if (calculationFactor < 0.1) calculationFactor = 0.1; // Prevent division by zero or extremely small values
// Simplified calculation: Total capacity / daily consumption rate
// Assume 2 hours usage at brightness 5 is baseline for batteryCapacityHours
var effectiveDailyUsageHours = usageHoursPerDay * (1 + (screenBrightness – 5) * 0.1) * (1 + (sessionDurationMinutes – 30)/150) * (1 + numGraphsDrawnPerSession * 0.05);
if (effectiveDailyUsageHours 90) estimatedBatteryLifeDays = 90; // Cap at a reasonable max
if (estimatedBatteryLifeDays = 0) {
var appStorageConsumptionMB = numAppsInstalled * 0.08; // Average app size in MB
estimatedStorageFreeMB = totalAvailableStorageMB – osStorageConsumptionMB – appStorageConsumptionMB;
if (estimatedStorageFreeMB < 0) estimatedStorageFreeMB = 0;
estimatedStorageFreeMB = parseFloat(estimatedStorageFreeMB.toFixed(2)); // Format to 2 decimal places
} else {
estimatedStorageFreeMB = "N/A";
}
// Display results
document.getElementById("estimatedBatteryLife").innerText = estimatedBatteryLifeDays === Infinity ? "Very Long" : (typeof estimatedBatteryLifeDays === 'number' ? estimatedBatteryLifeDays.toFixed(1) : estimatedBatteryLifeDays) + " days";
document.getElementById("estimatedStorageFree").innerText = estimatedStorageFreeMB === "N/A" ? "N/A" : estimatedStorageFreeMB.toFixed(2) + " MB";
}