When several similar batteries share one bag, it is easy to pick up the pack you just used. A simple routine helps you spend more time on the shot and less time checking the same pack twice.
Give each pack an identity
Number the storage slots or use a removable label on the case. Keep a short note of which pack went into the aircraft and when it came out. Leave battery contacts, vents and manufacturer markings clear.
Separate ready and used packs
Reserve one compartment for packs ready for the next flight and another for packs awaiting inspection or charging. Check the actual battery reading before takeoff. For charging, storage levels and temperature limits, follow the manual for your exact battery model.