CAMERA POWER PLAN AND SESSION LOG
Yenra | Updated September 7, 2026
Article: https://yenra.com/batteries/

PURPOSE AND INSTRUCTIONS
Plan power for one identified camera and shooting session. Confirm every battery, charger, cable and external source against the camera's manual. Run representative tests before a critical assignment. This is not a universal compatibility list.

KIT
Camera model / firmware / manual:
Battery model or approved AA chemistry and matched-set size:
Charger / exact instructions:
Lens / card / recording format / display or viewfinder:
Flash / stabilization / wireless / playback / expected temperature:
External-power port / supported protocol / supply / cable:
Installed-battery requirements and documented connection procedure:

RATINGS AND TESTS
Published rating and test conditions:
Type: still images / actual video / continuous video:
Test date / mode / conditions / pack ID:
Observed camera-on minutes or representative sessions per pack:
Repeat results and range:
Thermal or media recording limits encountered:

PLAN
Required camera-on time (minutes), including applicable standby/review:
Observed usable time per pack under representative conditions (minutes):
Chosen planning allowance (fraction) and reason:
Planned minutes per pack = observed minutes x (1 - allowance):
Total packs = round required minutes / planned minutes UP to a whole pack:
Spare packs = total packs minus installed packs:
Swap opportunities / charging access / uninterrupted-take requirement:

FICTIONAL CHECK
Observed 80 minutes per pack; chosen 20% allowance; planned 64 minutes.
180 required minutes / 64 = 2.8125, rounded UP to 3 total packs.
One installed plus two spares provides 192 planned minutes.
The 20% allowance is illustrative, not a guarantee. Increase reserve when tests vary or conditions worsen. Check full-duration external power for an uninterrupted take; a USB connection alone does not prove sustained operation or in-use charging.

POST-SESSION
Actual use / remaining power / interruptions / changes for next time:

REFERENCE CONTEXT
The linked article explains the comparisons and limits. Check exact project or equipment documents before using a specification.
Sony’s ILCE-7M4 specifications
https://helpguide.sony.net/ilc/2110/v1/en/contents/TP1000660153.html
CIPA’s DC-002 standard
https://www.cipa.jp/e/std/std-sec.html
Sony’s ILCE-7M4 battery-life page
https://helpguide.sony.net/ilc/2110/v1/en/contents/TP1000640154.html
ILCE-7M4 external-power instructions
https://helpguide.sony.net/ilc/2110/v1/en/contents/TP1000640153.html