Warnings And Safety Tips; Port / Buttons; Preset Battery Type Of Charger And Task Parameters; Key Operation Instructions - ISDT K4 User Manual

U SER GUIDE
Thanks for purchasing the ISDT K4 Smart Charger
Please visit: www.isdt.co for more details on the functions of this smart charger,
as well as purchase various accessories.
Functions of products will be kept on upgrading, the manual in your hand
may be di erent from the actual operation, please refer to the actual functions.

Warnings and Safety Tips

For your safety and a better user experience, please read this manual and
follow the instruction before using the new charger.
• Never use the charger without supervision, please stop using the charger and refer to the manual for reasons if
any functional abnormity.
•
Keep the charger away from dust, humidity, rain and high temperature, as well as avoid direct exposure to the
sunlight and intense vibration.
• Place the charger on a heat-resisting, non-flammable and insulating surface.
•
Do not use it on the car's seats, carpet or other similar places. Keep inflammable and explosive objects away
from operation areas of the charger.
• Read the instruction manual carefully to be familiar with the features of the charger, and set proper charging
parameters before operating. Setting the parameters incorrectly will result in damage to the product, personal
property and cause serious injury as well.
NEVER USE CHARGER UNSUPERVISED
• Never attempt to charge primary (non-rechargeable) batteries.
• Batteries pose a severe risk of fire if not properly handled.
• Read entire operation manual before using charger.
• This unit may emit heat during use.
Specifications
Model No.: K4
Input voltage: AC 100~240V / DC 10~34V
Output voltage: DC 1~34V
Max. input current: DC 45A
Charging current: 0.2~20A ×2
Discharging current: 0.2~3.0A ×2
Max. charging power: AC 400W / DC 600W ×2
Max. Discharging power: 30W ×2
Balance current: 1.5A/Cell Max
Supported battery types and cell count:
LiFe,LiIon,LiPo 1~8S; LiHv,ULiHv 1~7S; Pb 1~14S; NiMH/Cd 1~18S
WARNING! FIRE HAZARD!
• Only operate this device in a cool ventilated
area away from flammable objects.
• Failure to observe safety procedures may
cause damages to property or injury.
Parallel charging power/current: 800W/35A
Parallel discharging power/current: 60W/3A
Abnormal voltage alarm: Support
Incorrect cell count setting alarm: Support
Support Working temperature: 0~40°C
Storage temperature: -20~60°C
Dimension: 176×183×57mm
Weight: About 1230g

Preset Battery Type of Charger and Task Parameters

Rated Full Charge Storage
Voltage Voltage Voltage
1.20V 1.40V
NiCd/MH
2.00V 2.40V
Pb
3.20V 3.65V 3.30V
LiFe
3.60V 4.10V 3.70V
Lilon
3.70V 4.20V 3.80V
LiPo
3.80V 4.35V 3.85V
LiHv
3.90V 4.45V 3.90V
ULiHv

Port / Buttons

CH1
Button
SMART
CHARGER
Display
screen
CH1
USB-C
Balance
Upgrading Port
Port
CH1
Power
Output
AC Power DC Power
Input Input
Fan
Vent
How to Con rm Charging Current
Make sure to know the maximum charging current of the battery before charging, never use excessive
current to charge to damage your battery, which will result in over heat even explosion during the
charging process.
The charging and discharging capacity of battery is usually marked with C value. Multiplying the
charging C value and battery capacity equals to the maximum charging current supported by the
battery. For example, for a 1000mAh battery with a charging capacity of 5C, the maximum charging
current would be 1000*5=5000mA; therefore, the maximum charging current is 5A.
For a lithium battery, if it is impossible to confirm the supported charging C value, please set the
charging current below 1C, for the sake of its (lithium battery) safety.
The reference relation between C value and charging time: charging time ≥60 minutes/ charging
C value (e.g. it needs around 60-70 minutes to complete charging with 1C).
Discharge Balance Unbalanced Supported
Voltage Charge Charge
Cell Count
0.90V 1~18S
1.90V 1~14S
2.90V 1-8S
3.20V 1-8S
3.30V 1-8S
3.40V 1-7S
3.50V 1-7S

Key operation instructions

(under standby interface)
CH1 Channel Middle key:
Short press to enter the CH1
detailed parameter interface,
Long press to enter the CH1
task setting menu.
CH1
Button
CH2 Channel Middle key:
Short press to enter the CH2
detailed parameter interface,
Long press to enter the CH2
task setting menu.
Long press the CH1 and CH2
CH2
button at the same time:
Balance
Enter the advanced settings
Port
menu.
CH2
Power
Output
Fan
Vent
Max. Charging
Current
20.0A
20.0A
20.0A
20.0A
20.0A
20.0A
20.0A