Two battery fields. That's the field that separates a hobbyist who understands LiPo management from one who's about to puff a cell.
Each battery in an RC fleet has a cycle count and a condition history. A 4S 5000mAh pack that's been through 80 cycles at 1C charge rates is in a different condition than an identical pack with 25 cycles. Knowing which battery went into which model on which flight is the data that tells you when a pack is approaching end-of-service and needs to be retired before it becomes a fire risk in your car trunk on the way home from the field.
What the Log Captures Per Session
Model and Battery are the two identifiers that anchor every flight session. Customized from the defaults to actual aircraft and pack designations — "Goblin 570 Red" and "Turnigy 6S-5000-35C #3" — these fields make the log searchable by aircraft and by individual battery.
Take Off Time as a datetime field creates the session timestamp. Air Time in decimal minutes or fractional hours is the session duration. Together they build the usage history: battery 3 on the Goblin had 8.5 minutes on 14 March, 9.2 minutes on 21 March, and then a hard landing on 28 March. That sequence is visible in the filtered log.
Airfield using GPS location pins the flying site precisely. The local flying club field, the lakeside slope site 40 minutes north, the farmer's property that requires pre-arrangement. Location records mean you can find sites again and can see the geographic distribution of your flying over a season.
Description is the session narrative — the weather conditions at the field, the specific maneuvers practiced, the incident with the tree on the third flight, the note that the tail servo felt loose on landing and needs inspection before the next session. That observation, recorded immediately with the session timestamp, is the maintenance flag that prevents the tail servo from causing a genuine crash.
Rating one to five stars is the session-quality field: the two-star rating on a windy day at an unfamiliar site versus the five-star calm autumn morning on a familiar field with three perfectly executed figures-of-eight. Over time it shows which sites and conditions produce the best flying — and which batteries seem to correlate with shorter, lower-rated sessions.