The current implementation feels very bad for f2p players, since the notifications seem to be a none issue if you use the "x10 battle", instead of the normal single battle.
Most people wanna get the battles over with quickly and then return 8-10hours later when the energy is refilled, this notification makes it so in the case of highlevel players have to wait, twice as long per single battle as before the notification was implemented, making it very frustration to battle 20 times in a row after this notifaction implementation. So devs please make it so we can turn it off, or add it to the victory recap... please.