Hollyland Spares - Dual-Slot Charger (for Mars & Cosmo Series)

The Hollyland Dual-Slot Charger is an official OEM power accessory designed to charge the heavy-duty lithium-ion batteries that power the Mars and Cosmo wireless video transmission lines.

Because high-power wireless video transmitters and field monitors place a continuous drain on field batteries, keeping a fresh supply of power on standby is essential. This intelligent, dual-channel hub charges two production batteries simultaneously, ensuring your transmission system remains active throughout extended production schedules.

Core Hardware & Power Management Features

• Simultaneous Dual-Channel Charging: Engineered with two completely independent internal charging circuits. Unlike sequential chargers that top off one battery at a time, this intelligent hub pumps power into both connected batteries at the same time, cutting down your turnaround time on set.

• Intelligent Microprocessor Regulation: Built with an integrated safety monitoring chip. The charger automatically detects the specific capacity of the inserted cells, managing voltage and balancing the thermal envelope to prevent overcharging, short circuits, or performance degradation.

• Segmented LED Power Indicators: Each battery dock features a dedicated row of high-visibility LED status lights. This gives camera assistants and DITs (Digital Imaging Technicians) an instant visual reading of the exact charge percentage ($25\%, 50\%, 75\%, 100\%$) across both bays.

• Versatile Power Input Options: Equipped with standard power input architecture (such as a DC barrel or a modern USB connection interface depending on production batches), allowing it to run cleanly from standard AC wall outlets or high-output portable power banks on location.

System Interoperability & Battery Compatibility

This specialized charging block is custom-molded to interface seamlessly with the industry-standard battery type utilized natively by Hollyland's wireless image hubs:

• Battery Family Support: Sony L-Series / NP-F style batteries (including common capacities like NP-F550, NP-F750, NP-F970, and NP-F990).

• Ecosystem Hardware Targets: Powers the batteries that clip directly onto the rear sleds of the Mars 300 Pro, Mars 400S Pro, Mars 4K, Cosmo C1, and the Mars M1 / M1 Enhanced wireless field monitors.

Technical Specifications Matrix

• Official Component Family: OEM Production Infrastructure Power & Battery Spares

• Bay Configuration: 2 × Completely Independent Charging Slots

• Battery Chemistry Optimization: Lithium-Ion (7.4V Standard L-Series Architecture)

• Status Monitoring Interface: Independent multi-stage LED capacity displays

• Chassis Construction: Impact-Resistant, Flame-Retardant ABS Polymers

• Color Configuration Profile: Production Matte Black Finish

On-Set Lithium-Ion Charging Advice: To maximize the lifespan and safety of your high-capacity NP-F batteries, try to let hot batteries cool down for a few minutes before clicking them onto the charger immediately after a long shoot block. Batteries coming straight off a high-draw wireless transmitter or an active monitor carry significant residual heat; letting them settle prevents thermal saturation, allowing the charger’s intelligent safety chip to cycle power into the cells safely and efficiently.