E-flite Ultra Micro 4-Site BNF User Manual

Page 5

Li-Po cells should not be discharged to below 3V each under load. In the case of the

1S Li-Po battery used for the 4-Site, you will not want to allow the battery to fall to

below 3V during flight.

The 4-Site receiver unit features a soft low voltage cutoff (LVC) that occurs when the

battery reaches 3V under load. When the soft cutoff occurs, the ESCs of the receiver

unit will reduce power to the motor (regardless of the power level you have set with

the throttle stick) in order to prevent the voltage of the battery from dropping below

3V. This reduction in power usually requires that you land the model immediately, at

which point you should power down the model and unplug the flight battery. And while

it is possible to power the model up and to fly again after the soft LVC occurs, this

is NOT recommended as continued discharging to the soft LVC will cause permanent

damage to the Li-Po battery that results in lost power and duration when using the

battery for subsequent flights, or failure of the battery entirely. Continued attempts

to further discharge the battery may also result in loss of control while the motor is

running as the voltage of the battery may drop below the minimum operating voltage

of the receiver and other electronics.

Also, it is not recommended that you fly to the soft LVC every time you fly. Instead,

you should be aware of the power level of the battery/airplane throughout the flight,

and if at any time the airplane begins to require more throttle than typical to maintain

flight, you should land the airplane immediately. Routinely discharging the battery to

the soft LVC can still cause permanent damage to the battery.

If you have any further questions or concerns regarding the handling, charging and/or

use of the included Li-Po battery, please contact the Horizon Support Team

at 877-504-0233.

Celectra 4-Port 1-Cell 3.7V 0.3A DC Li-Po Charger Instructions

LED functions under normal operation:

• Solid – Charging

• Blinking – Charging nearly complete

• Off – Fully Charged

Replace D-size batteries when:

• LED remains solid for over 60 minutes when charging (70mAh–150mAh) Li-Po

batteries

• LED remains solid after removing single-cell Li-Po batteries from individual ports.

• LED remains off after inserting discharged single-cell Li-Po batteries in individual

ports.

It is important that you only charge E-flite and ParkZone 1-Cell 3.7V Li-Po batteries,

used in our Ultra-Micro flyers, with the Celectra 4-Port 1-Cell 3.7V 0.3A DC Li-Po

Charger (EFLC1004). Please familiarize yourself thoroughly with the Battery Warnings

and Guidelines section before continuing.