Thanks. The video reviews for the boat he is getting did say the ESC has a low voltage cutoff. Between that and the charger's functionality of checking/balancing individual cell voltage, I don't see the value added for one of those little voltage checker/warning buzzer devices. Seems to me they are mostly for flying, to alert the pilot of low voltage before loss of power. I guess with the boat, the ESC will cut power briefly at low voltage but then still allow for driving the boat back in at low speed?

When you mention temp related to "discharge level" are you referring to amperage? It looks like with this charger the amount of amperage used to charge/discharge batteries can be adjusted. In the videos I watched, they were charging up to storage voltage using 1 amp. Is this the optimal amperage for charging? Would that also be the optimal amperage for discharging (if needed to get down to storage voltage), or should discharging be done at a lower rate? Also, one of the videos I watched recommended storing them in the refrigerator. None of the other videos I watched mentioned anything about storage temp, just storage voltage. Is there an optimal storage temp?