FAFREES F26 Pro Manuel D'utilisation page 23

Use caution to avoid damage to battery connector terminals,
which are exposed when the battery is unlocked and
removed from the frame of the bike. In the case of damage to
the terminals or battery mounts, please discontinue use and
contact Fafrees Support immediately.
INSTALLING THE BATTERY
Ensure the battery is turned off.
DO NOT force the battery into the tray; slowly align and gently push the
battery down into the tray. Then push the battery in (make sure you push
hard enough) and hear the "CLICK" sound. Slightly turn the key to feel if
there's resistance from the key. If you can feel the resistance, then the
battery is completely locked.
Make sure there is no spaced between battery and tray.

Ensure the battery has been properly secured to the bike before each

use by carefully pulling outwards on the battery with both hands once
locked.
TIRE INFORMATION
F26 Pro/F28 Pro uses 26"*1.75" / 27.5"*1.75" rubber tires with inner tubes.
The tires are designed for durability and safety for regular cycling activities
and to be checked before each use for proper inflation and condition.
Proper inflation, care, and timely replacement will help to ensure that your
bike' s operational characteristics will be maintained, and unsafe conditions
avoided.
Fafrees recommends 40-65 PSI for the stock tires on F26 Pro/F28 Pro.
Always stay within the manufacturer' s recommended air pressure range
as listed on the tire sidewall.
It is critically important that proper air pressure is always
maintained in pneumatic tires. Do not underinflate or
overinflate your tires. Low pressure may result in loss of
control, and overinflated tires may burst. Failure to always
maintain the air pressure rating indicated on pneumatic tires
may result in tire and/or wheel failure.
Inflate your tires from a regulated air source with an available
pressure gauge. Inflating your tires from an unregulated air
source could overinflate them, resulting in a burst tire. Even
tires equipped with built-in flat-preventative tire liners can
and do get flats from punctures, pinches, impact, and other
EN 20