BaTTimer: Battery Calculator

Joostafer

Contains adsIn-app purchases

About this app

BaTTimer — battery runtime calculator and battery life estimator for discharge and charge.

Calculate how long your battery will last under load or how long it takes to charge. This battery calculator supports LiFePO4, AGM, GEL, lead-acid and other battery types.

Enter battery voltage (12V / 24V / 36V / 48V), capacity (Ah), and set minimum discharge level. Choose discharge or charge mode and input power or current in watts or amps. The app estimates battery runtime and shows a countdown timer.

BaTTimer helps you avoid deep discharge and understand battery charge time using a simple and practical battery runtime calculator.

Key features:

• Battery runtime calculator (discharge & charge)
• Battery life estimation based on load
• Voltage, capacity, and discharge limit settings
• Countdown timer for battery usage
• Power input in watts or amps
• Notifications before battery reaches limit
• Profiles for multiple battery setups
• Widget with active timer
• Clean and simple UI

Ideal for:

• Solar systems and off-grid setups
• UPS and backup batteries
• DIY electronics
• RV, boats, camping
• Power banks and external batteries

This battery calculator is useful for engineers, hobbyists, and anyone working with battery-powered systems.

Note: Results are estimates and may vary depending on real-world conditions.

What’s new

New update brings better control over your battery.

• Charge mode: estimate time to full
• More accurate runtime calculations
• Multiple battery profiles support
• Smart reminders before critical discharge
• Improved performance and UI

Stay in control. Avoid deep discharge. Plan ahead.