Flywoo Ultra Power UP-S4AC 2S Charger

The Ultra Power UP-S4AC is an ultra-compact, multi-functional four-channel AC/DC balance charger engineered explicitly to service low-voltage micro FPV flight packs and small-scale receiver batteries. Supporting 1S to 2S Lithium Polymer (LiPo) and High-Voltage Lithium (LiHV) chemistries alongside 2-6 cell NiMH/NiCd configurations, this station incorporates four completely isolated charging circuits. Each independent lane features a versatile multi-connector hardware cluster that accepts SM, XH, Micro, MX, JST, and mCPX footprints natively, eliminating the need for complex adapter octopus cables. Driven by a flexible dual-input AC/DC power infrastructure and guided by a clear digital telemetry LCD screen, the unit provides refined per-port amperage adjustments alongside deep circuit protection safeguards.

Features

Isolated Four-Channel Topology: Configured with four completely independent output lanes, allowing pilots to maintain four separate batteries simultaneously at varying states of charge or different cell configurations without cross-channel current interference.

Comprehensive Native Connector Clusters: Each individual port lane is built with an integrated hardware block housing SM, XH, Micro, MX, JST, and mCPX connection points to support diverse micro whoop and mini RC battery terminals without external leads.

Dual-Input AC/DC Flexibility: Features a built-in AC transformer for seamless plug-and-play operation from standard wall outlets on the bench, while accepting a 7.0V to 17.0V DC input rail for field charging via high-capacity battery packs.

Refined Digital Telemetry Feedback: Integrated high-contrast LCD screen cycles real-time data readouts including active cell voltage metrics, continuous charging currents, and isolated port processing states paired with independent LED indicator lights.

Multi-Layered Circuit Safeguards: Hardened onboard firmware layers constantly monitor internal pipelines, deploying instantaneous automated cutoffs to protect equipment against reverse-polarity insertion, over-voltage spikes, and over-current faults.

Specifications

Brand: Ultra Power

Model Name: UP-S4AC

Primary Input Power Infrastructure: AC 100V – 240V Mainlines / DC 7.0V – 17.0V Field Input Rails

Supported Battery Chemistries: LiPo / LiHV / NiMH / NiCd

Target Battery Cell Configurations: 1S – 2S Lithium Groups / 2 – 6 Cell NiMH/NiCd Series

Concurrent Charging Lanes: 4 Independent Isolated Channels

Selectable Current Current Corridor: 0.1 A – 1.0 A Per Port (Adjustable in 0.1A increments)

Maximum Port Power Capacity: 7 W Per Channel

Maximum System Power Delivery Ceiling: 28 W Combined Total Output

Integrated Hardware Port Interfaces: SM, XH, Micro, MX, JST, and mCPX Terminal Receptors

Visual Status Interfaces: Shared Digital LCD Telemetry Screen / Individual Status LEDs

Physical Structural Mass: 220.0 g

Physical Footprint Dimensions: 125 mm × 78 mm × 42 mm

LED Diagnostics

Solid Red/Green Sequence: Standard active operational charging metrics tracked via independent channel LEDs to signal real-time energy transfers or full target capacity cutoffs.

Notes

Multi-Connector Restriction Policy: Although each channel lane possesses a cluster of multiple connector types (SM, XH, JST, etc.), these connectors share a single output circuit path. Never connect more than one battery into the exact same numerical port channel group simultaneously. Attempting to charge multiple packs on a single channel will compromise circuit insulation, causing immediate cell voltage imbalances, permanent battery breakdown, or terminal thermal hazards.

Proper Chemistry and Current Scaling: Always match your selected menu profile and charging current to the specific battery under maintenance. For standard micro 1S whoop cells, it is recommended to charge at a 1C to 2C rating (e.g., a 0.3A to 0.6A current setting for a 300mAh battery) to guarantee long lifecycles and prevent excessive internal heat generation.

Package

1 x Ultra Power UP-S4AC Four-Channel AC/DC Smart Charger Base Module

1 x Technical User Operational Reference Manual