Yukon Trail Dirt Hawk 20 Owners Manual - Manual (Page 18)

DO NOT RETURN STORE. For questions regarding assembly and use, call Customer Service: 877-441-6999.
Charger
The electric bike comes with its own “Smart Charger” that connects with an
easy-access charger port for recharging the batteries. This charger has lights
which show the battery charge status.
Batteries work best when they have a full charge, so always be sure to
recharge them fully after each ride. If you leave then in a run-down condition,
without recharging them, it will shorten their life expectancy.
Li-Ion (Lithium ion ) batteries –charge for 4-6 hours
SLA (Sealed Lead Acid) batteries-charge for 6-8 hours
The charger may get warm to the touch, so make sure you charge they are
in an open area and do not lay anything on the charger unit while charging.
Although you cannot over-charge the batteries using the “Smart Charger”,
We recommend that you do not leave the charger plugged in for more the
24 hours.
If your charger shows a solid green light after charging for a short period of
time, your battery may have been only partially discharged (Short ride), or
this may be the sign of a partially worn out battery reduced charge
capacity. Continue charging for the full time, to cover all the bases. If the
battery still has not charged, you may need to replace it.
Even with Proper care, a rechargeable battery dose not last forever.
Average battery life depends of use and conditions.
The charger and charger port should be regularly inspected for
damage (Cord, plug, enclosure, etc.). If damage is found stop using until
the damage part can be repaired or replaced.