Tekin won't add autodetect because a dead 4s lipo (12-13V volts) looks alike a charged 3s pack (12.6 volts). That's just a liability they don't want to accept. The overlap is even worse with 5 and 6s packs. Auto voltage is definitely convenient for free running with various packs, but since Tekin's target market is racing, the vehicle it is in will rarely see a different voltage. Even then, you can change the voltage cutoff with the buttons right on the esc very quickly.