BATT 4DAT

BATT 4DAT is a battery planning app for individuals, hobbyists, and small teams who want to stay ahead of dead batteries without spreadsheets.

DEVICE TRACKING
Add the devices that run on batteries — remotes, smoke detectors, key fobs, tools, toys — with cells-per-device and quantity. BATT 4DAT rolls them up into installed battery demand per battery family.

BATTERY INVENTORY
Log the packs, boxes, and loose spares you keep on hand with manufacture dates and quantities. Chemistry-aware shelf-life estimates date every entry, and a printed package expiration date always overrides the generic estimate.

PURCHASE FORECAST
The forecast compares device demand against the stock that will still be usable — stable inventory counts, expiring-soon stock is flagged, expired stock is excluded — and recommends buying only the shortfall, with estimated costs and sensible pack sizes.

BATTERY EDUCATION WIKI
Browse and search a bundled, fully offline battery knowledge base: chemistry guides, wiki articles, ranked battery types, and source-backed references covering voltage, capacity, storage, safety, and corrosion prevention.

SMART REORDER LINKS
One tap opens Amazon in your browser with a search for exactly the batteries you are short on. As an Amazon Associate, 4DAT earns from qualifying purchases — links only open the browser, and nothing is ever purchased automatically.

PREMIUM
The free plan tracks up to 10 devices and 10 battery-stock records. BATT 4DAT Premium is an optional yearly subscription ($6.99/year) that unlocks unlimited devices and battery stock.

PRIVACY FIRST
Everything stays on your device: no account, no analytics, no tracking SDKs, and the app requests zero permissions. Your battery records never leave your phone.