K4 Manual (Multilingual)

ManualsBrandsiSDT ManualsBattery ChargersK4 Smart AC/DC Lithium Battery Charger (8S/20A/600W DC, 400W AC)

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.

Thanks for purchasing the ISDT K4 Smart Charger

Warnings and Safety Tips

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.

•

For your safety and a better user experience, please read this manual and

follow the instruction before using the new charger.

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

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

NiCd/MH

LiFe

Lilon

LiPo

LiHv

ULiHv

Rated

Voltage

1.20V

2.00V

3.20V

3.60V

3.70V

3.80V

3.90V

Full Charge

Voltage

1.40V

2.40V

3.65V

4.10V

4.20V

4.35V

4.45V

Storage

Voltage

3.30V

3.70V

3.80V

3.85V

3.90V

Discharge

Voltage

0.90V

1.90V

2.90V

3.20V

3.30V

3.40V

3.50V

Balance

Charge

Unbalanced

Charge

Supported

Cell Count

1~18S

1~14S

1-8S

1-7S

Max. Charging

Current

20.0A

Preset Battery Type of Charger and Task Parameters

USER GUIDE

FIRE HAZARD!WARNING!

• 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.

• 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.

NEVER USE CHARGER UNSUPERVISED

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.

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

button at the same time:

Enter the advanced settings

menu.

CH1

Button

Display

screen

SMART

CHARGER

CH1

Button

AC Power

Input

DC Power

Input

USB-C

Upgrading Port

Fan

Vent

Fan

Vent

CH1

Power

Output

CH2

Power

Output

CH1

Balance

Port

CH2

Balance

Port

Port / Buttons

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).