Organize every battery—and the device it powers.

VoltLocker is the tidy, visual home for your battery collection. Catalog cells and packs with photos, track chemistry and capacity, assign them to devices, and reveal instant insights with a clean, glanceable dashboard. Perfect for photographers, gamers, makers, and anyone who’s ever wondered, “Which battery goes in this thing?”

Why you’ll love it

Know what you have: Add batteries with name, type (AA, 18650, 21700, pack, etc.), chemistry (Li-ion, NiMH, LiPo…), and capacity in mAh.

See it, remember it: Snap or pick photos for both batteries and devices so you recognize them at a glance.

Always know where it belongs: Assign batteries to devices (camera, controller, light, rig). Switch and unassign with a tap.

Find it fast: Tap-to-filter and group by Assigned/Unassigned, Type, Chemistry, or Name. For devices, filter by Has Batteries/Empty and Location, or group by Location or Name.

A dashboard that actually helps:

Assignment donut (Assigned vs Unassigned)

Batteries by Type & Chemistry

Unassigned by Type (what to allocate next)

Top Devices by Assigned Count

Devices by Location

Top Battery Capacities

Recent photo strip (batteries + devices)

Quick actions: Add a battery or device right from the dashboard.

Thoughtful touches: Multi-select edit & bulk delete, context menus for fast duplicate, sleek card UI that adapts to light/dark mode.

Free to start, simple to grow

Free plan: Track up to 4 batteries and 2 devices with all core features.

One-time unlocks (optional): Remove the limits with Unlimited Batteries and Unlimited Devices—buy only what you need.

Private by design

No account. No tracking. Your data lives on your device.

Works offline—perfect for the workshop, studio, or on the go.

What can you track?

AA, AAA, 9V, coin cells

18650 / 21700 and other lithium cells

Camera NP-F / LP-E style packs

Power banks and custom packs

Anything that charges and powers your gear

Pro tips

Use photos to tell look-alike cells apart.

Filter Unassigned to see what’s idle.

Group by Type to spot gaps or duplicates.

Duplicate a battery entry to add identical spares fast.