ISDT K2 Air Bluetooth AC/DC Dual 6S LiPo Charger
The ISDT K2 Air is a high-power AC/DC dual-channel LiPo charger built for RC pilots, drivers and hobbyists who want powerful charging at the bench without giving up smart wireless control. It supports up to 1–6S LiPo, LiHV, Li-ion and LiFe batteries, with two independently controlled charging channels and up to 20A per channel.
On AC power, the K2 Air delivers up to 200W total charging power. Connect a suitable external DC source and the charger can deliver up to 500W per channel, making it a compact but serious RC battery charger for larger-capacity packs and faster field charging.
Bluetooth connectivity adds another layer of convenience. With the ISDLink app, compatible mobile devices can monitor charging operation and access supported wireless functions, while BattAir smart battery technology helps compatible batteries exchange battery information with the charger.
Answer first: The ISDT K2 Air is best suited to users looking for a dual-channel 6S LiPo charger with built-in AC power, higher-power DC operation, Bluetooth app connectivity and smart battery support. Its standout combination is AC 200W + DC 500W ×2 + 20A ×2 + 1–6S lithium support.
Why Choose the ISDT K2 Air?
AC/DC Charging for Home and Field Use
The K2 Air combines an integrated AC input with a high-power DC input, so one charger can cover both everyday bench charging and higher-power field setups. AC input supports 100–240V, while the DC input operates from 10–30V.
Maximum charging power is 200W on AC and up to 500W ×2 on DC. The two power inputs are designed to be used separately rather than simultaneously.
Independent Dual-Channel Charging
Two independent channels allow the K2 Air to charge two compatible RC batteries at the same time. Each channel supports charging currents from 0.2A to 20A, helping the charger handle everything from smaller hobby packs to larger high-capacity LiPo batteries within its voltage and power limits.
1–6S LiPo and LiHV Battery Support
The K2 Air supports LiFe, Li-ion, LiPo and LiHV batteries from 1S to 6S. It also supports Pb batteries from 1–12S and NiMH/NiCd packs from 1–16S, giving this smart RC charger broad compatibility across different battery chemistries.
Bluetooth Control with ISDLink
A key difference between the K2 Air and a conventional balance charger is its wireless functionality. Bluetooth connectivity works with the ISDLink app for supported remote monitoring and charger management functions, reducing the need to remain directly in front of the charger when checking charge progress.
BattAir Smart Battery Support
The K2 Air supports BattAir smart battery technology. When used with compatible smart batteries, battery information can be exchanged with the charger to simplify identification and charging parameter setup.
2.8-Inch IPS Color Display
A large 2.8-inch IPS display presents charging information clearly, including channel status, current, voltage and battery data. The split-screen layout also makes it easier to monitor both charging channels at the same time.
Balance Charge, Discharge and Storage Functions
Beyond normal balance charging, the K2 Air supports discharge, storage and battery management tasks. Maximum discharge power is 15W ×2, with a discharge-current range of 0.2–1.5A per channel.
Synchronous and Parallel Charging Modes
For advanced setups, the charger supports synchronized dual-channel operation and parallel charging. Maximum parallel charging capability is rated at 800W / 35A when the charger is supplied with a suitable DC power source and configured correctly.
USB-C Firmware Updates and 5V/2A USB Output
The USB-C interface can be used for firmware updates. When USB charging is enabled in the charger settings, the Type-C port can also provide 5V/2A output for compatible devices.
Adjustable DC Power Supply Mode
CH1 can also operate as an adjustable DC power supply, providing 2–30V adjustable voltage and 1–5A adjustable current. This gives the K2 Air additional usefulness on an RC workbench beyond conventional battery charging.
ISDT K2 Air Specifications
| Model |
ISDT K2 Air |
| Charger Type |
AC/DC Dual-Channel Smart Balance Charger |
| AC Input |
100–240V |
| DC Input |
10–30V |
| Maximum DC Input Current |
35A |
| Output Voltage |
DC 1–30V |
| Charging Current |
0.2–20A ×2 |
| Maximum Charging Power |
AC 200W / DC 500W ×2 |
| Discharge Current |
0.2–1.5A ×2 |
| Maximum Discharge Power |
15W ×2 |
| Balance Current |
1.5A/Cell Max |
| LiPo / Li-ion / LiFe |
1–6S |
| LiHV |
1–6S |
| Pb |
1–12S |
| NiMH / NiCd |
1–16S |
| Parallel Charging |
800W / 35A |
| Parallel Discharging |
30W / 3A |
| USB-C Output |
5V / 2A when USB Charge mode is enabled |
| CH1 DC Power Supply |
2–30V / 1–5A adjustable |
| Display |
2.8-inch IPS Color Display |
| Dimensions |
142 × 135 × 64 mm |
| Weight |
Approx. 700g |
| Stock Number |
ISDTK2AIRDCAC |
What Batteries Can the K2 Air Charge?
For most RC users, the key specification is its support for 1S through 6S lithium batteries. That makes the K2 Air particularly useful for common RC car, airplane, FPV drone and boat battery configurations including 2S, 3S, 4S and 6S LiPo packs.
Charging current and power should always be set according to the battery manufacturer's permitted charge rate. High charger output capability does not mean every battery should be charged at the charger's maximum current.
K2 Air for RC Cars, Planes, Drones and Boats
With dual outputs, AC/DC flexibility and support for common 1–6S RC battery configurations, the K2 Air works well as a multi-purpose RC LiPo charger for workshops, race pits and flying fields. Users running several battery-powered RC platforms can manage different battery sizes and chemistries from one charger rather than maintaining separate chargers for each application.
ISDT K2 Air Manual
For charger setup, operating procedures, charging-current selection and safety information, see the
ISDT K2 Air User Manual.
Charging safety: Never leave batteries charging unattended. Use the correct battery chemistry, cell count and charging current, place the charger on a heat-resistant and non-flammable surface, and maintain adequate ventilation during operation.
Explore More RC Battery Chargers
Compare the K2 Air with other models in the
ISDT charger collection,
or browse the wider
LiPo battery charger range
for additional RC charging options.
If dual-output charging is a priority, you can also compare other models in our
dual and multi-channel LiPo charger collection.
ISDT K2 Air FAQ
Is the ISDT K2 Air an 8S LiPo charger?
No. The K2 Air supports LiFe, Li-ion, LiPo and LiHV batteries from 1S to 6S. If you specifically need an 8S charger, choose an ISDT model designed for 8S lithium batteries.
How much charging power does the K2 Air provide?
Maximum charging power is 200W using AC input and up to 500W per channel using a suitable DC power source.
Can the K2 Air charge two batteries at the same time?
Yes. It is a dual-channel charger with two independently controlled outputs, each supporting up to 20A within the charger's overall power and input limits.
Does the ISDT K2 Air support Bluetooth?
Yes. Bluetooth connectivity enables supported wireless operation and monitoring through the ISDLink app.
Does the K2 Air support BattAir batteries?
Yes. The K2 Air supports BattAir smart battery technology for compatible smart battery information exchange and assisted parameter setup.
Can the USB-C port charge other devices?
Yes. When USB charging is enabled in the system settings, the Type-C interface can provide a 5V/2A output. When USB charging is disabled, the interface is used as the firmware upgrade port.
Can the K2 Air work as a DC power supply?
Yes. CH1 can operate as an adjustable DC power supply with 2–30V voltage adjustment and 1–5A current adjustment.
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