VoltCano - Battery Power Calculator & Charging Database

Technical Deep Dive

Comprehensive Battery Intelligence

VoltCano compiles specifications for over 150 mobile devices, tablets, laptops, and power banks. Each entry includes precise mAh and Wh capacity measurements, maximum charging wattage supported by the device hardware, port configurations including USB-C, Lightning, and MagSafe variants, and compatibility matrices for fast-charging protocols from USB Power Delivery to proprietary standards like Samsung Super Fast Charging and SUPERVOOC.

The charging standards library documents 15 distinct protocols with version-specific technical parameters. This includes voltage range negotiation mechanics for USB-PD profiles ranging from 5V to 20V, Quick Charge iterations from 2.0 through 5.0 with their distinct handshake protocols, wireless charging standards Qi and Qi2 with power efficiency comparisons, and emerging GaN technology implementations that enable compact high-wattage chargers.

Five dedicated calculators transform raw specifications into actionable data. The charge time calculator applies real-world efficiency curves accounting for constant-current and constant-voltage charging phases, tapering algorithms above 80 percent battery level, and heat dissipation factors. Power bank calculations incorporate connection-type efficiency losses with USB-C achieving 90 percent efficiency, USB-A at 85 percent, and wireless charging around 70 percent. The electricity cost calculator models daily, monthly, and annual charging expenses based on device capacity, charging frequency, and regional kWh rates.

Verified Specifications

Version 1.1.1

Size 5.1 MB

Developer Noah Bodek

Category Utilities

Age Rating 4+ Years

Requires iOS 14.0 or later

Language English

Last Updated 17.05.2026

Platform Only for iPhone

Core Capabilities

Device Database

Access full battery specifications for 150+ devices including iPhones from the 6S through the 15 Pro Max, Samsung Galaxy flagships from S20 through S24 Ultra, Google Pixel series, iPads, MacBooks with M-series chips, Android devices from OnePlus and Xiaomi, portable power banks rated from 10,000mAh to 27,650mAh, and wearables. Each entry lists capacity in both mAh and Wh, maximum charging wattage, supported fast-charging standards, wireless charging capabilities, estimated full charge time, battery chemistry type, rated cycle count, and device-specific charging optimization tips.

Charging Standards Library

Comprehensive documentation of 15 charging protocols including USB Power Delivery 2.0 and 3.1 with programmable power supply profiles, Qualcomm Quick Charge versions 2.0 through 5.0 with backward compatibility notes, Apple MagSafe and MagSafe 3 magnetic alignment specifications, Qi wireless charging standard and Qi2 with magnetic positioning, Samsung Adaptive Fast Charging and Super Fast Charging 2.0, OPPO SUPERVOOC and VOOC technologies reaching 240W, Xiaomi HyperCharge implementations, and GaN gallium nitride charger technology enabling higher power density in smaller form factors.

Charge Time Calculator

Input your device selection from the database or manually enter capacity in mAh, set current battery percentage and target percentage, specify charger wattage, and select wired or wireless connection type. The calculator applies efficiency adjustment factors with wired charging at 85-92 percent efficiency and wireless at 65-75 percent, models the constant-current constant-voltage charging curve that causes slowdown above 80 percent battery level to protect cell longevity, and displays estimated charge time in minutes. Side-by-side comparison mode allows testing multiple wattage scenarios simultaneously to visualize the time savings from higher-wattage chargers.

Power Bank Calculator

Enter power bank capacity in mAh, select your device from the database, choose connection type with efficiency presets of USB-C at 90 percent, USB-A at 85 percent, or wireless at 70 percent efficiency. The calculator outputs the realistic number of full charges accounting for conversion losses, voltage regulation overhead, and cable resistance. Trip duration estimator allows you to set charges per day rate to calculate how many days a power bank will sustain your device usage pattern, accounting for partial discharge cycles and battery degradation over the trip duration.

Electricity Cost Calculator

Enter device battery capacity, average charges per day, charger wattage which affects vampire power draw even when not actively charging, and your electricity rate per kilowatt-hour. The calculator computes daily charging cost, multiplies to monthly and yearly projections, and includes a reference comparison table showing typical annual costs across device categories from smartphones at around two dollars per year, tablets at five dollars, laptops at fifteen dollars, up to electric vehicles at several hundred dollars annually based on regional electricity rates and usage patterns.

Power Converter

Interactive Watts-Volts-Amps triangle calculator implementing Ohm's Law where entering any two values instantly computes the third. Dedicated mAh-to-Wh converter requires voltage input since milliamp-hours must be multiplied by voltage to yield watt-hours, with adjustable voltage field defaulting to common battery voltages of 3.7V for lithium-ion cells. Preset reference buttons populate fields with standard USB configurations including USB 2.0 at 5V and 0.5A equaling 2.5W, USB 3.0 at 5V and 0.9A for 4.5W, and household outlets at 120V or 230V depending on region.

Charge Journal

Log individual charging sessions with selectable device from your tracked list, start and end battery percentage to calculate energy added, charger type and wattage which affects charging speed and heat generation, duration in minutes, ambient temperature which impacts charging efficiency and battery health, and freeform notes field for observations about charging behavior. The journal displays a weekly chart visualizing charging frequency and session duration patterns, calculates daily average charge percentage added, and tracks consecutive-day streak to gamify consistent charging habit monitoring.

Battery Health Tracker

Record battery maximum capacity percentage over time as reported by iOS Settings or third-party Android battery health apps. The line chart plots monthly trend showing the degradation curve, calculates the degradation rate as percentage loss per month, and projects the future date when battery health will decline to 80 percent which Apple defines as the threshold for battery replacement consideration. Cycle count reference displays your device's rated cycle lifespan with visual progress indicator showing current cycle count position, helping you anticipate when battery service may become necessary based on manufacturer specifications.

System Architecture

Data Storage Model

All device specifications, charging standard documentation, and calculator presets stored locally in on-device SQLite database eliminating internet dependency for core functionality
User-generated data including charge journal entries, battery health records, and custom device configurations saved to device storage with iCloud sync option for backup across user's Apple devices
Database schema version tracking enables seamless app updates with automatic migration of user data to new schema versions while preserving historical records and custom configurations
Zero telemetry or usage analytics transmission ensures complete privacy with no external server communication required for app operation beyond initial App Store download

Calculation Engine

Charge time algorithm applies piecewise function modeling constant-current phase from 0 to 80 percent at full wattage, then constant-voltage phase from 80 to 100 percent with exponential taper to protect battery longevity
Power bank efficiency factors derived from IEEE charging standard measurements accounting for DC-DC converter losses, voltage regulation overhead, cable impedance, and thermal dissipation during high-current transfer
Electricity cost calculations incorporate charger idle power consumption typically 0.1 to 0.5 watts even when not actively charging, phantom load that accumulates over 24-hour periods when charger remains plugged in
Power converter triangle solver implements Ohm's Law with input validation preventing division by zero, enforcing reasonable value ranges for consumer electronics, and displaying error states for impossible electrical configurations

About the Developer