VARTA SPBC3604A Li-Ion Battery Charger VKB57061101301, 41.80V DC 4.0A, 100–240V AC Input

VARTA SPBC3604A Li-Ion Battery Charger VKB57061101301, 41.80V DC 4.0A, 100–240V AC Input
Condition: Briefly Used. No deficiencies, missing components, or physical damage were specified; verify the supplied AC cord and DC output connector against your battery system before installation.

Description

The VARTA SPBC3604A, identified by VARTA part/reference number VKB57061101301, is an AC-powered lithium-ion battery charger designed for nominal 36V Li-ion battery systems. The charger accepts universal 100–240V AC, 50/60Hz mains power and provides a regulated 41.80V DC output at up to 4.0A.

A 41.8V charging voltage strongly corresponds to a 10-series-cell (10S) lithium-ion battery architecture, where a conventional 36V nominal pack reaches approximately 42V at full charge. The slightly lower 41.80V label value should be treated as the authoritative specification for this particular charger.

With a calculated maximum rated DC output of approximately 167.2 watts, this is a substantially faster charger than common 2A chargers used with smaller 36V packs. It may be suitable for mobility equipment, industrial battery packs, powered carts, electric bicycles, scooters, and other equipment originally engineered around the same VARTA battery/charger interface.

Important: Voltage and current ratings alone do not establish charger compatibility. The DC connector, connector polarity, battery chemistry, battery-management system (BMS), temperature sensing, and any communication or enable circuitry must also match.

Specifications

• Brand / Label: VARTA
• Model: SPBC3604A
• VARTA Reference / Part Number: VKB57061101301
• Product Type: Lithium-ion battery charger
• Battery Chemistry: Li-ion
• Nominal Battery System: Approximately 36V
• Likely Cell Configuration: 10S Li-ion
• AC Input Voltage: 100–240V AC
• Maximum Input Current: 2.2A
• Input Frequency: 50/60Hz
• DC Output Voltage: 41.80V DC
• Maximum Output Current: 4.0A
• Calculated Maximum DC Output Power: 167.2W
• Input Type: Universal / worldwide mains voltage range
• Charging Method: Intended for rechargeable lithium-ion battery packs
• Additional Label: MP1403CD034085
• Plug: Rosenberger RoPD (See pictures)

Electrical Summary

Features

• Designed specifically for lithium-ion rechargeable battery systems
• Approximately 36V nominal battery-pack compatibility
• High 4.0A charging-current capability
• Regulated 41.80V DC output
• Approximately 167W maximum DC charging power
• Wide-range 100–240V AC input
• Compatible with both 50Hz and 60Hz electrical systems
• Suitable for international mains environments when used with the correct AC cord
• Dedicated charger configuration rather than a generic adjustable power supply
• Intended to work in conjunction with a battery pack equipped with an appropriate BMS
• Higher charge-current capability than typical 1.5A or 2A 36V mobility chargers

Battery Configuration

The 41.80V output is consistent with charging a battery composed of approximately 10 lithium-ion cell groups connected in series (10S).

A conventional lithium-ion cell has a nominal voltage around 3.6–3.7V. Therefore:

• 10 × 3.6V = approximately 36V nominal
• 10 × 3.7V = approximately 37V nominal
• Full-charge voltage is normally close to 42V for a conventional 10S Li-ion pack

Because this charger is specifically labeled 41.80V, batteries or equipment requiring exactly 42.0V, 41.5V, LiFePO4 charging profiles, or proprietary charging protocols should not automatically be considered interchangeable.

Applications

Potential applications include compatible:

• 36V lithium-ion battery packs
• Electric bicycles
• Electric scooters
• Personal mobility equipment
• Powered carts
• Material-handling equipment
• Portable industrial machinery
• Battery-powered service equipment
• Mobile industrial devices
• Commercial battery-powered equipment
• OEM machinery using VARTA battery packs
• Battery packs using a compatible 10S lithium-ion architecture

The VKB57061101301 part number should be used as the primary compatibility reference when replacing an original charger.

Charging Performance

At its rated 4.0A maximum output, theoretical charging time can be estimated from battery capacity. Actual charging takes longer because charging current normally tapers near full charge.

Approximate examples:

• 8Ah battery: roughly 2–3 hours
• 10Ah battery: roughly 2.5–3.5 hours
• 12Ah battery: roughly 3–4 hours
• 16Ah battery: roughly 4–5 hours
• 20Ah battery: roughly 5–6+ hours

These are general estimates only. Battery condition, BMS limits, state of charge, temperature, and charger control strategy affect actual charging time.

Part Number Identification

SPBC3604A

The model designation SPBC3604A appears consistent with a charger model family in which the numerical portion may describe the basic electrical class:

• 36 — likely associated with the 36V nominal battery class
• 04 / 4A — consistent with the specified 4.0A output

This interpretation is useful for identification but should not be treated as an official VARTA part-number decoding standard unless confirmed by manufacturer documentation.

VKB57061101301

VKB57061101301 appears to be a VARTA-specific product, OEM, assembly, or service reference number. This is the most useful identifier for locating an exact replacement because chargers with the same basic voltage/current specifications can have different:

• Connectors
• Polarity
• Charging logic
• Temperature-sensor connections
• Enable contacts
• Communication interfaces

Additional Label: MP1403CD034085

MP1403CD034085 is likely a production, traceability, lot, or serial-related identifier rather than the primary charger model number.

A possible structural interpretation is:

• MP — factory, production-line, or supplier designation
• 1403 — potentially a production/date-related code
• CD — possible manufacturing line, revision, or batch designation
• 034085 — likely sequential production or serial information

The manufacturer-specific coding system has not been confirmed, so it would be inappropriate to state that 1403 definitively means March 2014, even though that is one plausible date-code interpretation.

For replacement matching, prioritize identifiers in this order:

VKB57061101301 → SPBC3604A → 41.80V / 4.0A → connector and polarity → MP1403CD034085

Cross-Referenced Models

No exact plug-and-play OEM cross-reference can be established from the supplied label information alone. Appropriate search and comparison references include:

• VARTA SPBC3604A
• VARTA VKB57061101301
• SPBC3604A 36V 4A Li-ion charger
• 41.8V 4A 10S lithium-ion charger
• 42V-class 4A charger for 36V Li-ion battery systems

A generic 42V/4A charger should not be substituted solely because its voltage and current are similar.

Comparable Products

Electrically comparable charger classes include:

• 36V nominal / 41.8V 4A Li-ion battery chargers
• 36V nominal / 42V 4A Li-ion battery chargers
• 10S lithium-ion CC/CV chargers rated approximately 160–170W
• 36V 2A Li-ion chargers for slower charging applications
• 36V 5A Li-ion chargers where specifically approved by the battery manufacturer

The 2A and 5A variants should not automatically be considered replacements. A battery pack designed for a maximum 4A charging rate may not safely accept a higher-current charger.

Compatible Battery and Equipment Systems

The SPBC3604A should normally be considered part of a larger charging system consisting of:

AC mains → SPBC3604A charger → compatible DC connector → battery BMS → 10S Li-ion battery pack → powered equipment

For a replacement application, confirm all of the following:

• Original charger part number
• Battery nominal voltage
• Battery chemistry
• Maximum charging voltage
• Permitted charging current
• DC connector shape
• Connector pin count
• Positive and negative polarity
• Additional sensing pins
• Temperature-monitoring connection
• BMS requirements
• Equipment-side interlocks or communications

If the battery label specifically lists VKB57061101301 or SPBC3604A as the required charger, this is substantially stronger compatibility evidence than voltage alone.

Important Compatibility Notes

Do not use this charger with:

• 36V lead-acid batteries unless specifically approved
• 36V LiFePO4 batteries requiring a different charge voltage
• 24V lithium-ion packs
• 48V lithium-ion packs
• Battery packs requiring less than 41.8V maximum charge voltage
• Batteries whose permitted charging current is substantially below 4A
• Equipment with an incompatible connector or polarity

A Li-ion charger is a controlled charging device, not simply a 41.8V general-purpose DC power supply.

Common Requests:

• VARTA SPBC3604A 41.8V 4A lithium-ion battery charger replacement
• VARTA VKB57061101301 charger for 36V Li-ion battery pack
• 100-240V input 41.80V output 4A VARTA battery charger
• SPBC3604A charger for 10S 36V lithium-ion battery
• Replacement charger matching MP1403CD034085 and VKB57061101301

Related

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Trademark Disclaimer

VARTA and any other manufacturer names, model designations, part numbers, logos, and trademarks referenced in this description are the property of their respective owners. They are used solely for product identification, compatibility reference, and informational purposes. No affiliation with, sponsorship by, or endorsement from the respective trademark owners is implied.

P114-1; B004; GT00011