Hohm Tech SCHOOL⁴ 4A USB-C Battery Charger

Power your rechargeable batteries with precision using the Hohm Tech SCHOOL⁴ 4A USB-C Battery Charger. An upgraded evolution of the popular SCHOOL 2A Charger, this advanced 4-bay intelligent charger delivers fast, adaptive charging through innovative battery management technologies, USB-C connectivity, and extensive safety protections.

Designed for users who rely on multiple rechargeable lithium-ion batteries, the SCHOOL⁴ intelligently adjusts charging amperage for each installed cell, ensuring efficient charging while helping maximize battery longevity.

Note: Batteries are not included.

Intelligent 4-Bay Charging

The Hohm Tech SCHOOL⁴ features four independently managed charging bays capable of intelligently adjusting charging current based on battery requirements.

Intelligent Charging Levels:

• 0.5A Charging
• 1.0A Charging
• 2.0A Charging

The charger automatically selects the appropriate charging level to optimize battery performance and lifespan.

Advanced Battery Length Detection (BLD)

The integrated Battery Length Detection (BLD) System automatically measures each battery and adjusts charging parameters accordingly.

BLD Benefits:

• Automatic Battery Recognition
• Optimized Charging Current
• Improved Charging Efficiency
• Compatible with Batteries up to 73mm

This intelligent system helps ensure every compatible battery receives the appropriate charging profile.

Four-Stage Intelligent Charging Algorithm

The SCHOOL⁴ utilizes an advanced Four-Stage Charge/Discharge Algorithm to maximize battery health.

Charging Stages:

• Constant Current (CC)
• Constant Voltage (CV)
• Oscillation Phase
• Micro-Pulse Charging

Combined with Binomial DV Algorithmic Technology, this charging process promotes consistent performance and long-term battery reliability.

Universal Li-Ion Battery Compatibility

Designed for versatility, the SCHOOL⁴ supports a broad range of 3.6V and 3.7V lithium-ion batteries.

Compatibility:

• Li-Ion Batteries
• Battery Lengths up to 73mm
• Compatible with many popular rechargeable battery sizes

Always verify battery compatibility before charging.

Modern USB-C Connectivity

Powered through a convenient USB Type-C connection, the SCHOOL⁴ can operate from virtually any compatible 5V USB power source.

USB-C Benefits:

• Modern USB-C Input
• Reliable Power Delivery
• Wide USB Compatibility
• Convenient Charging Anywhere

Durable Fire-Retardant Construction

Unlike traditional ABS plastic chargers, the SCHOOL⁴ is built using durable non-ABS fire-retardant materials for enhanced durability and safety.

Construction Features:

• Fire-Retardant Housing
• Two-Tier Battery Bridge System
• Piano Wire Spring Charging Bays
• Multi-Groove Positive Battery Contacts

Designed for reliable everyday charging performance.

Advanced Safety Protection

Multiple built-in protections help safeguard your batteries during every charging cycle.

Safety Features:

• Reverse Polarity Protection
• Wrong Battery Type Detection
• Overcharge Protection
• Short-Circuit Protection
• Integrated Input Power Regulator
• Automaintenance System
• Battery Doctor Technology

These intelligent systems help deliver dependable charging while protecting compatible batteries.

Rear LED Status Display

The SCHOOL⁴ features a rear LED light readout system for simple charging status monitoring while maintaining its clean, screenless design.

Hohm Tech SCHOOL⁴ Features

• Four Independent Charging Bays
• Intelligent 0.5A / 1A / 2A Charging
• USB Type-C Input
• Battery Length Detection (BLD) System
• Four-Stage Charging Algorithm
• Binomial DV Algorithmic Technology
• Compatible with 3.6V / 3.7V Li-Ion Batteries
• Supports Batteries up to 73mm
• Fire-Retardant Construction
• Rear LED Charging Indicators
• Integrated Input Power Regulator
• Reverse Polarity Protection
• Overcharge Protection
• Wrong Battery Type Detection
• Short-Circuit Protection
• Operating Temperature: 0–40°C (32–104°F)

Dimensions

• 108mm × 96mm × 29mm

Battery Safety Guidelines

For safe charging and maximum battery life:

• Never overcharge or over-discharge rechargeable batteries.
• Do not charge damaged batteries or batteries with torn wraps.
• Always inspect batteries before charging.
• Never leave charging batteries unattended.
• Charge batteries on a clean, fire-resistant surface.
• Store batteries in protective, non-conductive battery cases.
• Keep batteries away from heat and open flames.
• Dispose of batteries according to local recycling regulations.

Why Choose the Hohm Tech SCHOOL⁴?

• Intelligent 4-Bay Charging
• USB-C Connectivity
• Automatic 0.5A–2A Charging
• Battery Length Detection Technology
• Four-Stage Charging Algorithm
• Universal Li-Ion Compatibility
• Fire-Retardant Construction
• Advanced Safety Protections
• Compact Screenless Design

The Hohm Tech SCHOOL⁴ 4A USB-C Battery Charger is a premium charging solution built for users who demand intelligent performance, broad battery compatibility, and dependable safety. With adaptive charging technology, USB-C convenience, advanced battery management features, and durable construction, it delivers efficient, reliable charging for compatible lithium-ion batteries every day.