ISDT D2 Mark II 1-6S Smart Balance Charger – 200W 12A Dual Channel AC Charger

The ISDT D2 Mark II is a 200W dual-channel AC smart balance charger designed for users who want two independently controlled charging channels without adding a separate external DC power supply. It accepts 100–240V AC input, provides up to 12A charging current on each channel, and supports LiPo, LiHV, LiFe and Li-ion batteries from 1S to 6S, along with NiMH/NiCd and lead-acid battery programs.

Compared with the original D2 concept, the Mark II adds functions such as Parallel Task, Dual Task and CH1 DC Power output, while retaining a compact desktop format, 2.4-inch IPS display, dual-fan cooling and ISDT's scOS charging interface.

ISDT D2 Mark II Specifications

200W Dual-Channel Charging from AC Power

The D2 Mark II is particularly useful for a permanent home or workshop charging station because its power supply is built into the charger. Connect it to a compatible 100–240V AC mains source and it can operate without the separate DC power supply required by many high-performance compact chargers.

Its two charging channels can independently manage separate batteries, with charge current adjustable from 0.2A to 12.0A per channel. Maximum available charging power for the charger is 200W total, so actual current at any moment depends on battery voltage, charging conditions and how the available power is being used across the two channels.

This distinction matters when comparing charger specifications: the D2 Mark II should not be interpreted as providing 200W independently from each channel.

Two Independent Charging Channels

The D2 Mark II provides two independently controlled battery channels, allowing two supported batteries to be charged, discharged or managed at the same time. This can be especially useful for RC users who regularly prepare multiple batteries before a flying, racing or driving session.

Each channel has its own battery output and balance connection. When two different charging tasks are used, each channel can display its own operating information on the 2.4-inch IPS screen.

A 5V/2A USB output is also provided on the side of the charger for powering or charging suitable USB devices.

Parallel Task: Combine Both Channels for One Battery

One of the more important D2 Mark II upgrades is Parallel Task. Despite the name, this should not be confused with connecting several batteries to a conventional parallel charging board.

In Parallel Task mode, the D2 Mark II combines the capability of its two charging outputs for one battery. A correctly wired one-to-two power splitter is required: the battery connects to one side of the splitter while the two charger-side connections attach to the D2 Mark II output ports. The battery balance lead connects to one of the charger's appropriate balance ports.

The official operating instructions specify a Parallel Task charging-current adjustment range of 12–20A and a parallel discharge-current range of 1.5–3A. This is also why some descriptions of the D2 Mark II reference a 20A capability: 20A applies to the combined Parallel Task mode, not 20A per independent channel.

Dual Task for Matched Charging Settings

The D2 Mark II also provides a Dual Task function. When selected, the charger applies the same configured parameters to batteries connected to both channels for charging, discharging or storage tasks.

This can simplify repetitive battery preparation when two suitable packs need the same operating parameters, while still using the D2 Mark II's two-channel architecture.

CH1 Can Operate as an Adjustable DC Power Supply

The D2 Mark II adds another useful bench function: CH1 DC Power mode. When this function is selected, Channel 1 operates as an adjustable DC power output rather than as a battery charger.

The output voltage can be adjusted from 2 to 24V, with current adjustable from 1.0 to 5.0A. This can be useful for suitable low-voltage bench electronics and hobby equipment within the charger's supported output limits.

LiPo, LiHV, LiFe and Li-ion Battery Support

The ISDT D2 Mark II supports a broad range of rechargeable battery chemistries, including LiPo, LiHV, LiFe and Li-ion batteries from 1S to 6S. It also supports NiMH and NiCd batteries from 1 to 16 cells and lead-acid batteries from 1 to 12 cells.

For multi-cell lithium packs, the charger's balance connections support 2S through 6S on each channel. A 1S lithium pack does not require multi-cell balancing, which is why the supported lithium chemistry range can begin at 1S while the balance-port specification begins at 2S.

scOS Smart Charging Interface

The D2 Mark II uses ISDT's scOS smart charging interface, combining a 2.4-inch 320 × 240 IPS display with dedicated channel buttons and a speed shuttle control for navigating tasks and advanced settings.

The visual interface displays charging status, current, battery voltage, capacity information and individual cell information where applicable, helping users monitor both channels from one screen.

The charger also includes a firmware update interface, allowing supported firmware updates to be performed through a computer.

Dual-Fan Active Cooling

Inside the D2 Mark II, ISDT uses a carefully arranged internal power system together with a dual-fan cooling design. Active airflow helps remove heat generated by the internal AC power supply and charging electronics during operation.

Good ventilation around the charger is still essential. Do not block the cooling openings or operate the charger on a soft surface that can restrict airflow.

Compact Desktop Design

The D2 Mark II measures approximately 120 × 108 × 70mm, allowing the charger, AC power system, two charging channels and active cooling system to fit into a relatively compact desktop enclosure.

Because the AC supply is integrated, this design can reduce the number of separate devices and power cables required compared with a DC-only charger paired with an external desktop power supply.

100–240V AC Input and Power Protection

The D2 Mark II accepts 100–240V AC input, allowing the charger electronics to operate across common mains voltage ranges when used with the correct regional AC power cable and plug.

ISDT also describes the AC power-management system as using PFC technology together with several protective functions, including short-circuit, overload, over-voltage and over-temperature protection.

Multiple Interface Languages

The D2 Mark II interface supports multiple localized languages, including English, German, French, Spanish, Japanese, Traditional Chinese and Simplified Chinese.

Who Is the ISDT D2 Mark II Best Suited To?

• RC users who want a dual-channel charger with a built-in AC power supply.
• Pilots or drivers regularly charging two LiPo or LiHV batteries during the same session.
• Users working with battery systems up to 6S who do not need an 8S charger.
• Home and workshop charging stations where AC convenience is more important than an ultra-compact DC-only charger.
• Users who can benefit from Parallel Task, Dual Task or the adjustable CH1 DC Power function.

ISDT D2 Mark II Manual

For operating instructions, Parallel Task setup, Dual Task operation, DC Power mode and charger safety information, refer to the official ISDT D2 Mark II User Manual.

Compare More ISDT Chargers

If you are comparing the D2 Mark II with other AC/DC, DC-only or higher-cell-count charging options, browse the ISDT chargers and battery charging tools available from CNHL.

You can also explore the wider LiPo battery chargers collection to compare charging equipment across different brands and power levels.

What to Check Before Buying

• Confirm that your battery chemistry is supported.
• For lithium balance charging, confirm that your pack is within the supported 2S–6S balance range.
• Consider whether 200W total charging power is sufficient for your battery capacities and preferred charging rates.
• Remember that the maximum 12A rating is a current limit and does not mean 12A is available at every battery voltage and operating condition.
• If using both channels simultaneously, account for the charger's total available power.
• Use the correct regional AC mains cable and plug.
• If using Parallel Task, use the correctly wired splitter required by the operating instructions.
• Confirm battery polarity and balance connections before beginning a charge cycle.

FAQ

Is the ISDT D2 Mark II an AC or DC charger?

The D2 Mark II is an AC-input charger with a 100–240V input range. It does not require an external DC power supply for normal charging. Its CH1 DC Power function is an adjustable DC output, not a DC charger input.

How much charging power does the D2 Mark II provide?

The official specification lists a maximum charging power of 200W total. The charger has two channels with charging current adjustable up to 12A per channel, but the available current is also limited by total charging power and battery voltage.

Can the ISDT D2 Mark II charge 6S LiPo batteries?

Yes. The D2 Mark II supports LiPo and other supported lithium chemistries from 1S to 6S, with balance charging support from 2S to 6S on each channel.

Can it charge LiHV batteries?

Yes. LiHV is included among the supported battery chemistries. Select the correct LiHV charging program and confirm the battery manufacturer's permitted charging voltage before use.

Can the D2 Mark II charge two batteries at once?

Yes. It has two independently controlled charging channels. Available total charging power is shared within the charger's 200W maximum specification.

What is Parallel Task on the D2 Mark II?

Parallel Task combines both charger outputs to work with one battery through the required splitter cable. It should not be confused with using a conventional parallel charging board to connect multiple batteries.

Why do some listings describe the D2 Mark II as a 20A charger?

Each independent charging channel is specified for up to 12A. The official operating instructions specify up to 20A in the combined Parallel Task mode. Therefore, 20A should not be interpreted as 20A available independently from each channel.

What is Dual Task?

Dual Task allows the charger to apply the same configured charging, discharging or storage parameters to batteries connected to both channels.

Can the D2 Mark II work as a DC power supply?

Yes. Channel 1 can be configured as an adjustable DC power output from 2–24V and 1.0–5.0A for suitable applications.

Where can I find the ISDT D2 Mark II manual?

You can view the ISDT D2 Mark II User Manual for specifications, advanced functions and safety instructions.

Package Includes

• 1 × ISDT D2 Mark II Smart Balance Charger
• 1 × AC Input Cable

Charging Safety Notice

Always verify battery chemistry, cell count, polarity and charging parameters before starting a task. Operate the charger in a cool, well-ventilated area on a heat-resistant, non-flammable and electrically insulating surface.

Never charge damaged, swollen or otherwise questionable batteries. Do not cover the charger or obstruct its cooling fans, and never leave batteries unattended while charging or discharging.