going faster

Giant lafree

Hello everybody, i am new here and i need a little help with my electrical bike: a giant lafree.
I really want it to go faster but i have no idea how to do this. Do i need to buy new batteries of 48V or can I do by doing something with the batteries?
btw i think i have a 24 volt battery

Help me please

High Voltage: The Fast Track to Plug In the Auto Industry A behind-the-scenes look at the robustly competitive race to dominate the market for electric cars.
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