V1.0
RUNGU Electric Juggernaut LE User Manual
Copyright 2018 Standard Bearer Machines, LLC
36
Battery Care
During Charging
You have state-of-the-art Lithium Batteries. Make sure to charge them in a cool, dry area. If batteries or
charger get too hot while charging (you can’t hold your finger on either the
Battery Case, BMS, battery,
charger for more than 5 seconds), immediately stop charging and check for connection problems.
CAUTION: IT IS IMPORTANT THAT THE BATTERY CHARGER GETS AIR FLOWING OVER THE
HEATSINK AND IS OUT OF DIRECT SUN TO AVOID OVERHEATING OR BATTERY FAILURE
Standard charge time for 15Ah batteries is approximately 4.5 hours with the 4A charger.
After Riding
After riding your Rungu, store the Rungu in an UNCHARGED STATE (40-60% of full charge capacity) to
prolong the life of the battery. Avoid fully recharging the battery unless you expect to ride your Rungu
soon after (within the next 48 hours).
In general, avoid storing your Rungu in a place that exceeds 77 degrees Fahrenheit (25 degrees Celsius).
Longer term storage (>1 month) at higher temperatures impact the ability of the battery to recover full
capacity.
Long Term Storage
In the event you plan NOT to use the Electric Juggernaut for a period of more than three weeks, follow
the directions “
Remove the battery from the Electric Juggernaut
” to
remove the battery. Store it with
~60% charge (around 74V) in a dry location where temperature remains below 77 degrees Fahrenheit
(25 degrees Celsius). For best battery care during extended storage, recharge the battery for 10-20
minutes once a month. The battery will lose charge over time and these periodic short recharges will
allow you to keep the battery cells in balance prolonging the life of the battery.
Prolonging the Life of your Battery
The Electric Juggernaut features the most powerful, lightest weight and best performing battery on the
market. Depending on how you take care of your battery, you should expect 3-5 years of use and up to
1000 charge cycles. Despite its outstanding performance characteristics, the battery does have a shelf
life, so even if you are not using it the performance degrades with time. The following two best
practices along with those described above will help you optimize your battery life.
Avoid draining the battery to zero capacity (when the battery management system shuts it off
–
Cycle
A
nalyst doesn’t turn on when you turn the key
). Draining the battery adversely affects the number of
cycles a battery can sustain. Instead try to recharge your battery when
you’ve used
80% of its capacity
(68 V).
Don’t ride at full throttle all the time.
Discharge rate (Amps out) generates heat that stresses the
battery; doing so continuously diminishes the number of cycles a battery can recover fully and decreases
the life of the system. When climbing hills and going through sand, always pedal to remove some of the
load from the motor and decrease discharge rate from the battery.
