HD-0688 Single-Slot 18650 Li-ion Smart Battery Charger | Pro Tronix

Product Description

The HD-0688 is a compact, high-efficiency single-slot universal smart charger engineered specifically for 3.7V Lithium-Ion cylindrical cells, with an optimized focus on standard 18650 batteries. Designed for safe and effortless benchtop utility, this plug-and-play charger features an intelligent automatic stop mechanism that cuts off power output once the cell reaches peak capacity ($4.2\text{V}$), protecting the battery against overcharging, capacity degradation, and thermal stress. Its rugged, spring-loaded slider mechanism adapts smoothly to varying cell lengths, maintaining stable electrical contact throughout the cycle. For hardware developers, field service technicians, and electronics hobbyists, it provides a highly reliable, standalone power maintenance accessory to keep diagnostic equipment and prototyping arrays continuously fueled.

Pinout / Layout Connections

The module features an integrated all-in-one chassis with direct electrical plug interfaces:

• AC Input Power Plug: Built-in flip-out or fixed wall plug pins designed to fit directly into standard electrical outlets (AC 100V – 240V).

• Single Independent Charging Slot:

  • Top Stationary Contact (+): The upper fixed metal plate serves as the positive terminal connection.

  • Bottom Spring Slider (-): The tensioned lower sliding contact plate accommodates various cell lengths and serves as the negative terminal connection.

• Status LED Indicator: A clear, surface-mounted LED light that displays immediate visual status tracking:

  • Red Light: Active charging cycle in progress.

  • Green Light: Charging cycle complete (Auto-Stop engaged) or empty slot standby state.

Applications

• Battery Maintenance: Recharging individual 3.7V 18650 Li-ion cells utilized in high-drain industrial testing gear.

• Prototyping Setup Supporter: Keeping spare 18650 power cells ready for wireless IoT nodes, field microcontrollers, and portable robotic chassis.

• Field Service Kit Asset: Providing a reliable charging solution for tactical LED flashlights, electronic test probes, and portable meters.

• DIY Hardware Testing: Safe charging and validation of recovered or individual lithium-ion cells before assembly into battery brackets.

Technical Specifications