V2.2
RUNGU Electric Juggernaut User Manual
–
2017 model year
Copyright 2017 Standard Bearer Machines, LLC
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Battery Care
You have state-of-the-art Lithium Batteries that have different characteristics than SLA batteries. MAKE
SURE TO CHARGE IN A COOL, DRY AREA! If the 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.
Standard charge time for 14Ah batteries is approximately 5 hours with the 4A charger. When you are
through riding your bike for a while, always store your batteries in an UNCHARGED STATE (40-60% of full
charge capacity), you will greatly prolong the life of your batteries. Only fully charge the batteries when
you will be using them soon after. Store batteries in a cool, dry place, and where temperature does not
ever exceed 85 degrees F. That is pretty much all there is to it!
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
Long Term Storage
Hi Power Cycles has designed these batteries and the electrical system to be as maintenance free as
possible. In the event you plan to not use the Electric Juggernaut for a period of more than three weeks,
it is advised to open the battery case, disconnect the battery from both connectors, and remove the
battery and store it with ~60% charge (around 50-52V). If you are storing them long term (for the
winter) it is best to store in a cool place and completely unhooked from your bicycle. For best results,
every month you don’t use the Electric Juggernaut,
hook the battery up to the charger for 10-20 minutes
as the battery will lose charge over time and this will allow you to put some extra charge in the battery
and balance the cells.
Prolonging the Life of your Battery
The Electric Juggernaut features the most powerful, lightest weight and best performing batteries on
the market. NMC based systems should expect around 3-5 years of use depending on how you take care
of your battery and up to 1000 charge cycles. Remember that these batteries do have a shelf life so even
if you are not using the pack, the battery will only be good for so long.
To prolong the life and performance of the pack, it is best to not drain the pack to zero capacity (like
when the battery management system shuts it off). Going from 100% to zero capacity will adversely
affect your life cycles. It is much better, for instance, to go from 100% to 50%. If you only rode your bike
3 miles every day, you are better off charging the battery after each ride instead of waiting until the
battery is dead. Keeping the depth of discharge less than 80% (so from 100% to 20%) will make sure you
get the full life from the battery.
