Which bike. Generally, you get a bit more power with a bigger battery because you get less voltage sag and the voltage will also be higher because it doesn't go down so quickly.
Cheers...I'm currently riding a Kalkhoff Sahel i360 Harmony with a 14.5ah battery but it's not quite right for me and I'm considering an Impulse 10 with a 17ah battery, not my main concern but a tad more power would be nice.
.....Mike
