Interactive Energy Simulator

Phone Battery & Charging Calculator

Simulate charging curve, real-world Screen-on Time (SOT), and battery endurance by device or custom hardware profile.

Xiaomi Redmi A7

1-Click Lifestyle Presets:

Everyday Mode: ~32% remaining at 11:30 PM bedtime.

Battery Capacity: 5200 mAh

1,500 mAh 5,000 mAh (Standard) 8,000 mAh

Charger Power (Wattage): 15 W

5W (Standard) 45W (Fast) 150W (Hyper)

Refresh Rate

Brightness Level

Values use standard Li-ion saturation curves with thermal stepping after 80% to preserve battery health.

Full Charge Time (0% to 100%)

-- mins

Fast Charging

0% to 50% -- m Fast Stage

0% to 80% -- m Optimal Cutoff

80% to 100% -- m Trickle Protection

0% 50% (Fast) 80% (Safe) 100%

Charge 20 mins: +50%

15-Minute Emergency Boost: How much battery you get in 15 mins

+--%

Full 100% Discharge Estimate

-- hrs BGMI / Genshin / COD

-- hrs YouTube / Netflix 1080p

-- hrs Instagram / Chrome / FB

-- hrs 4G / 5G VoLTE

-- days Screen Off, Background Sync

20% – 80% Rule: Charging up to 80% and not letting battery drop below 20% can extend total battery lifespan from 2 years up to 4+ years.
Heat Management: Avoid intensive gaming while ultra-fast charging (67W+) as elevated temperatures accelerate chemical degradation.
Overnight Charging: Modern phones feature adaptive trickle protection, but disconnecting around 80-90% preserves optimal battery health.