These are both 18650 lithium-ion cells.
They are the most common lithium cell
used in everything from power tools to
laptops to the 7000 in each and every
Tesla Model S.
The most common types of batteries
in current models are lithium-ion
batteries, often made of the same
18650 cells that are used to power
everything from laptops and cordless
drills to Tesla automobiles (the Tesla
Model S uses 7000 of these batteries to
power each car). Better manufacturers
carefully match these cells in each pack
to balance the load and increase battery
life. With high-capacity cells, this means
really long rides and years of good
service (see our article on getting the
most out of your batteries).
In the early days, lithium batteries
You have to pick a style—not just for utility, but also to fit your personality.
This is a Pedego fat-tire cruiser.
If you need a folding bike, there are electric bikes available for that. Folding bikes don’t
go as fast or as far, but if you’re commuting to and from a train station or need to toss
it in the trunk, they are perfect.
caught fire and burned down a few
garages. Lithium fires are no joke—
almost nothing will put them out. This is
why we don’t recommend that anyone
build homemade electric project bikes.
But with quality OEM batteries with
great battery management systems
(BMS) and proper handling, they’re
quite safe and will provide 500–2000 full
Batteries come in a variety of
voltages and capacities. Most range
from 24 to 48 volts, and capacities
from 10 to 20 amp-hour. Your concern
isn’t the listed capacity of the battery
but rather the range. You are more
concerned with the watt-hours of the
battery to determine range (voltage x
amp-hour). A good estimation of range
is your watt-hour of the battery divided
by 20 watt-hours/miles (what you can
expect in the best conditions using
throttle only). If you commute five miles
each way to and from work, you’re
better off with at least a 20-mile range.
It gives you a little extra in case you
need it, like strong headwinds, small
extra errands and forgetting to charge it
If you like to go on 20–40-mile
rides on weekends, get something
that has a longer range than that. Get
something with a minimum of 400–800
watt-hours of battery capacity, even if
you don’t ride 40 miles that often. Fully
exhausting the battery often is bad