idk786

please pardon my ignorance i am totally new to electric bikes and i just plug in & charge my kid's bike till the light goes green and he rides. He gets about 45 minutes riding flat out on a set of batteries and I bought a second set to change when the first one is flat. Now he says he's just getting warmed up when his second set is almost out (he's 6). Was about to invest in a petrol bike when i came across this, how much longer can i get on 36V lipo upgrade? is there someone who could guide me on what i need to get? from what i understand after reading all these posts the main advantage is weight reduction and increased pwer but will i get more riding time also?