I use both 3S and 4S lipos when I fly. I started off with 3S and upgraded to 4S, however I still use my 3S as warm up packs. Since voltage differs on both packs I created several functions to warn me no matter which pack I'm flying.
Taranis -plus, Naze32 rev5, d4r-ii, Rotorgeeks 20a ESCs, Cobra 2204/2300 (on 3S pack) / EMAX RS2205s/2300 (on 4S pack). Turnigy 1300mah 3S, Turnigy graphene 1300mah 4S
01:40 Other special functions
02:35 Timer setup
04:10 Telemetry screen explaination
04:40 start of 3S flight
07:40 3S just before battery call
09:25 3S voltage compare
09:58 start of 4S flight
11:55 4S CRASH and restart
13:05 4S punchout
13:30 4S battery warnings more frequent
14:20 4S battery critical more frequent
15:30 4S voltage compare
