It is for a scooter weighing about 11 kg total, the legal definition I don't know exactly :
"Electric scooter means a device with no more than two ten-inch or smaller diameter wheels that has handlebars, is designed to be stood upon by the operator, and is powered by an electric motor that is capable of propelling the device with or without human propulsion at a speed no more than twenty miles per hour on a paved level surface."
But since my goal is not to define such scooters for legislation, current or future, but to possibly find a lighter alternative to the currently installed battery which weighs roughly 2 kg (casing is thin plastic box) :
model YK-3606-B4
zhuoneng
36 V 6 Ah 216 Wh
which I'd assume is a normal Li-ion
I was considering RC model Li-polymer batteries :
zippy
turnigy
multistar
but they seem to require a special charging connector which I don't think I have installed ?
as for LTO Lithium titanate I don't think they have high energy density ? from wikipedia :
A disadvantage of lithium-titanate batteries is that they have a lower inherent voltage (2.4 V), which leads to a lower specific energy (about 30–110 Wh/kg[1]) than conventional lithium-ion battery technologies, which have an inherent voltage of 3.7 V[10], although some lithium-titanate batteries are reported to have an energy density of up to 177 Wh/L.[1]
apparently there are quite high energy density Li ceramic (or glass ?) electrolyte ones, but not yet available commercially ? (also not flammable)
so the best way to reduce weight at the moment might be Li-polymer ? but a bit complicated/delicate ?
I don't intend to do any stunts with it, only make it a little lighter in order to carry it for a flight of stairs ...
