A simple label system distinguishes ready batteries from used ones and helps you notice a battery that behaves unusually. Without one, you end up swapping cells in the middle of a shoot and wondering which one is flat.
What to do
Use a non-damaging identification method and the manufacturer’s storage guidance. Keep contacts protected. Record which batteries were charged, used and returned to the charging area after the session.
Start by giving each battery a number or colored mark that stays with it. That way you can tell them apart quickly and spot patterns in how each one performs.
A simple labeling system
A good system is quick to use in the field:
- Numbers or colored tape on the side: placed where they do not cover contacts, vents or the maker’s markings.
- Two zones in your bag: a pocket or case for charged batteries and another for used ones.
- Case orientation: a rule such as contacts up for ready and contacts down for used, if your case allows it.
- Charging routine: charge after every session so the ready pocket is always full.
- Log: a notebook or phone note with the date, battery number and approximate shots or time used.
Keep a contact cover or case on each battery when it is loose, so metal objects cannot touch the terminals.
A mistake to avoid
Do not mix uncertain batteries back into the ready compartment. Labels should not cover contacts, vents or required safety markings. If you are not sure a battery is charged, put it with the used ones.
A detail worth checking
Keep discharged and uncertain batteries distinct from confirmed ready ones. A simple compartment convention reduces repeated checking, but it should still follow the battery maker’s storage and transport requirements.
Try this practical check
Number the batteries and track one ordinary shoot. If one consistently empties much sooner under similar use, inspect it according to the maker’s guidance rather than relying on memory. Stop using any battery that swells, leaks or becomes unusually hot.
Common questions
Can I use stickers on batteries?
Only if they do not cover contacts, markings or vents and do not make the battery harder to fit. Colored tape on the case may be safer.
How should I store batteries between shoots?
Follow the maker’s instructions, which usually advise a cool, dry place and protected terminals.
How do I tell a worn-out battery?
It drains much faster than the others, or the camera reports a low charge soon after charging. Replace it rather than relying on it for important work.
Related reading
Mirrorless Camera Buying Guide: Sensor, Lens Mount, Video (2026)
