CellLog: LiPo Battery Tracker

CellLog is a per-pack logbook for LiPo, LiHV and Li-ion batteries. Track every pack you own — cycles, internal resistance, swelling and storage voltage — and retire packs on data, not guesswork.

MADE FOR RC, FPV, DRONE & AIRSOFT
Whether you fly quads, planes and helis, drive RC cars or run airsoft AEGs, your packs age with every charge. CellLog keeps one clean record per battery, so you always know which pack is fresh and which is on its way out.

BATTERY REGISTRY
- Register each pack: chemistry (LiPo / LiHV / Li-ion), cell count, capacity, C-rating, purchase date, baseline IR
- See your whole fleet at a glance with health badges: Healthy, Watch, Retire

CYCLE COUNTER
- Tap "+1 Cycle" after each charge - that is all it takes
- A cycle gauge fills toward your retirement limit, one colored block per log
- Session logging: back from the field, tick every pack you used and add +1 cycle to all of them in one tap

HEALTH CHECKS
- Log internal resistance per cell, swelling and storage voltage
- IR trend chart shows rising resistance before the pack lets you down
- Full log history per pack, with delete for wrong entries

RETIRE SIGNAL
- Set your own rules: cycle limit and IR rise limit
- CellLog flags packs to watch and packs to retire - with the numbers to back it up

NFC TAGS
- Stick an NFC tag on a battery, link it once, then tap to open that pack instantly
- Write tags right from the app

YOUR DATA STAYS YOURS
- Everything is stored on your device - no account, no cloud, no tracking
- Export your full logbook to CSV anytime

CellLog is free for up to 3 packs. One single purchase unlocks unlimited batteries, session logging, full log history, NFC tag writing and CSV export - forever, on all your devices.