Hearing Aid Battery Logger – Online Hours & Size Life Expectancy
Track how long each battery size (10, 312, 13, 675) lasts you. Estimate replacement schedule.
UD5 Toolkit
Maximize your device's battery life on AMOLED/OLED screens. Activate a minimal power page to keep your phone alive longer.
On AMOLED/OLED screens, pure black pixels are turned off completely, consuming zero power. LCD screens will still benefit from reduced brightness strain.
A discreet, power-efficient digital clock keeps you informed without draining your battery. Perfect for bedside or emergency use.
No ads, no tracking, no data collection. A pure, static web tool that works offline once loaded.
See how your screen looks in power-saving mode
Track how long each battery size (10, 312, 13, 675) lasts you. Estimate replacement schedule.
Check if your brand's batteries fit other tools or if aftermarket adapters exist. A simple matrix reference for DIYers.
Enter appliance loads and battery capacity to estimate how long your RV can run without recharging. Local simulation.
Set a reminder to change smoke detector batteries every 6 months. Optional sound alert and visual countdown. Local browser notification, stay safe.
Estimate how long a battery will last given capacity (mAh/Wh) and load current. Also computes backup time for power banks. Quick and local.
Drag a virtual ruler across your screen to measure pixel distances. Horizontal and vertical guides. Useful for UI designers checking alignment.
See your monitor's color depth and pixel depth. Detect if HDR or wide gamut is available using media queries.
Toggle a screen wake lock to prevent the device from dimming or sleeping. See the lock state and learn the API.
Connect to a BLE device and read its Battery Service characteristic. See the charge level in a gauge.
Request and release a screen wake lock to keep the device awake. See the lock state in real time. Perfect for recipes or presentations.
Use the browser's native eyedropper tool to pick any color from the screen. Shows zoomed preview. Quick and easy.
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.
An on‑screen ruler that measures in pixels, centimeters, and inches. Drag to resize. Handy for UI designers and developers.
Combine multiple identical batteries in series and parallel and see the resulting voltage and total capacity. Electronics helper.
Display detailed information about your current browser, including version, JavaScript status, cookie support, and screen size. Works instantly with no input.