
Archived App (Last seen on 29 Oct 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
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About
CellDrain - Thermal Battery Predictor
Predict the unpredictable. Master your thermal environment.
When you are operating in sub-zero arctic winds or intense desert heat, your equipment’s factory battery percentage is lying to you. Standard indicators measure current voltage, entirely ignoring the precipitous drop-off caused by environmental thermal shock. For professional drone pilots, cinematographers, and field researchers, this blind spot results in ruined takes, grounded flights, and sudden catastrophic gear failure.
CellDrain is a mission-critical thermodynamic calculation engine built specifically for field operators.
By taking your equipment's baseline power draw, your specific battery capacity, and the current environmental temperature, CellDrain computes a highly accurate Thermal Runtime Gauge. Stop guessing how much time you have left based on a generic battery icon, and start operating with precision-calculated minute-by-minute predictions.
THE FLEET DEGRADATION MATRIX
Professionals don’t just use one battery. Log your field sessions directly into the Cell Archive. CellDrain analyzes your historical data to track the exact degradation curve of every individual battery in your kit. Instantly identify which cells are performing at peak efficiency and which ones are dying and need to be purged from your fleet before your next paid gig.
THE EXPEDITION SIMULATOR
Planning a shoot in harsh conditions? Use the Expedition Simulator to run a reverse-thermodynamic calculation. Input your target shoot duration and the expected weather, and CellDrain will tell you exactly how many fully charged battery packs you need to survive the environment.
Feature List
Thermodynamic Sag Engine: Proprietary algorithm that calculates true runtime decay based on temperature and capacity.
Thermal Runtime Gauge: Clear, high-visibility countdown of true operational minutes remaining.
Fleet Matrix: Track and assign health scores to every individual battery you own.
Cell Archive: Log specific field sessions to build a personalised, long-term degradation database.
Expedition Simulator: Predictive kit planning for future shoots in extreme weather.
Custom Equipment Profiles: Pre-calibrated discharge baselines for Drones, Camera Bodies, Video Lights, Audio Recorders, and Field Monitors.
Minimal Topographic UI: A bespoke, glare-resistant interface designed for high legibility in harsh outdoor environments.
Real-World Problem Solved
Lithium-ion batteries suffer severe voltage sag in cold weather and capacity degradation in extreme heat. Factory battery gauges do not account for these external thermal realities. CellDrain solves the problem of "unexpected equipment death" by providing operators with the true, environmentally-adjusted operational time they actually have left.
Why This Solution Is Valuable
CellDrain shifts the professional workflow from reactive guessing to proactive, data-driven planning. It prevents the catastrophic loss of expensive equipment (such as drones falling from the sky), ensures cinematographers capture the final shot without power failure, and prevents operators from packing dead or severely degraded batteries for high-stakes, unrepeatable shoots.
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What's New in CellDrain
1.1.0
October 21, 2026
Improved the smoothness within the application







