Battery Calculator vs CrashMatrix Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Battery Calculator
Calculate estimated battery run time based on capacity and device consumption. Determine battery capacity from stored energy and voltage, and calculate required battery ratings based on load and duration.
- Battery life calculator
- Battery capacity calculator
- Battery size calculator
- Estimate run time
- Calculate battery capacity in Wh
- Calculate required battery rating in Ah
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Battery calculator include battery life calculator, battery capacity calculator and battery size calculator. battery life calculator uses battery capacity and device consumption to calculate estimated run time of battery life. battery size calculator calculates battery capacity, measured in amp hours based on energy stored in a battery, expressed in watt-hours and the voltage of the battery. battery size calculator calculates required the battery rating in ampere hour based on load, duration and discharge level. Formula: Battery Life Calc battery life = BC/DC * (BE/100) where: BC - capacity of your battery, measured in ampere hours [Ah] or miliampere hours [mAh]. This value is printed on your battery. DC - average current draw from electronic device, expressed in amperes [A] or miliampere [mA]. BE - The battery efficiency is the ratio of the energy retrieved from the battery, to the energy provided to the battery, when coming back to the same SOC state. Lithium-ion stays close to 90%. Lead acid batteries are lower at about 90%, and nickel-based batteries are closer to 80%. Battery Capacity Calc E = V * Q where: E - energy stored in a battery, expressed in watt-hours [Wh] or kilowatt-hours [kWh]. V - voltage of the battery. Q - battery capacity, measured in ampere hours [Ah] or miliampere hours [mAh]. Battery Size Calc Current calculation: If the load is specified in watt, the current is calculated as: I = P * V where: I - current in ampere. P - power in watts. V - voltage in volts. Lithium-ion batteries size = (100*I*t) / (100–Q) Lead-acid battery size = (100*I*t) / ((100−Q) * (0.02*t+0.6)) where: I - current in ampere. t - duration in hours. Q - required remaining charge in percentage. A battery rated for 100 Amp hours will provide 5 Amps for 20 Hours. If it is a 12 volt battery, multiply 100 by 12 and the battery will provide 1200 Watt Hours. divide the result by 1000 and the battery can supply 1.2 kW hours for the metric 'kilo' prefix. A kilowatt hour is a measure of energy used by an appliance if it were kept running for one hour. To keep in mind. Since the Amp Hour rating is a 20 Hour rating, so we need to treat kilowatt conversion as 20 hour rating. For the 1200 Watt Hour conversion, the battery will provide 60 Watts for 20 Hours. Ampere is an electrical unit used to measure the current flow towards the load. The battery life or capacity can be calculated from the input current rating of the battery and the load current of the circuit. Battery life will be high when the load current is less. You can determine the time that how long the battery charge will last. For example, a circuit connected with 1000 mAh current rating and it is connected to the load of 20 mAh. Then the battery will last for 50 hours. Batteries are available in different current rating due to its high requirement of different industrial and domestic purposes. Any battery life can be easily calculated by the values of battery capacity in mAh/Ah and load current in mA/A. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
CrashMatrix Pro
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CrashMatrix Pro puts the power of advanced collision analysis in your pocket. Built by a veteran law enforcement professional with 35+ years of experience, this app delivers 37+ industry-standard calculators used in traffic crash reconstruction. SPEED ANALYSIS Speed from Skid Marks Slide to Stop Combined Speed Critical Speed Yaw Vault / Flip Speed from Fall Multi-Surface Speed INTERMEDIATE TOOLS Time & Distance Perception-Reaction Distance Stopping Distance Acceleration / Deceleration Grade Adjustment Drag Factor Kinetic Energy ADVANCED ANALYSIS Momentum (Inline & 360 Vector) Delta-V Crush Energy Coefficient of Restitution Law of Cosines Closing Speed RECONSTRUCTION SPECIALTIES Motorcycle Slide Rider Vault Wheelbase Reduction Truck/Trailer Momentum Trailer Braking Rollover Speed Pedestrian Speed Bicycle Speed And more ADDITIONAL FEATURES Complete Formula Reference Cards with worked examples Unit Converter (Feet/Inches, MPH/FPS) Imperial and Metric toggle on every calculator Step-by-step completed formulas shown with every calculation Common drag factor and braking efficiency reference tables Works 100% offline — no internet required Designed for law enforcement officers, accident reconstructionist, insurance investigators, and forensic engineers who need accurate, reliable calculations in the field. One-time purchase. No subscriptions. No ads. No data collection.
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Verdict
The clearest difference is price: Battery Calculator at $2.99 against CrashMatrix Pro's $9.99. Battery Calculator also leads on iOS requirement (13.0 vs 15.1). CrashMatrix Pro's advantage is update cadence (every 4 days vs every 40 months). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Battery Calculator costs $2.99 and CrashMatrix Pro $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Battery Calculator ships an update every 40 months, CrashMatrix Pro every 4 days. Both last shipped on October 24, 2026.
| Parameter | Battery Calculator | CrashMatrix Pro |
|---|---|---|
| Price | $2.99 — better | $9.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 40 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 1 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitrio | Brian Watson |
In-app purchases
Battery Calculator
No in-app purchases
CrashMatrix Pro
No in-app purchases
Questions
Is Battery Calculator free?
Is CrashMatrix Pro free?
Do Battery Calculator or CrashMatrix Pro have ads?
Which is updated more often, Battery Calculator or CrashMatrix Pro?
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