XHM603 / XHM604 Compatible Circuit Board Why you need this board Precise, repeatable battery charging and protection control that reduces overcharge and deepdischarge risk. Wide input range and dualmodel support lets one solution cover many battery systems and retrofit needs. Simple local setup and hardware adjustment make it practical onsite without special tools or software. Industrialgrade switching output and stable performance protect connected equipment during load fluctuations. Key features and benefits Dualmodel compatibility: XHM603 is designed for 12–24V battery systems and XHM604 for 6–60V battery systems, while the board accepts a broad DC input from 6–80V. Easy to choose the correct model for your system. Precise display and control: 0.1V resolution on the display and control settings for accurate charge and cutoff thresholds. Tight voltage tolerance: Direct output configuration with ±0.1V control tolerance ensures reliable start/stop behavior for charging cycles. Hardware and software adjustments: Configure thresholds using onboard buttons or by tuning the potentiometers RP1 (charge initiation) and RP2 (disconnect voltage). Battery compatibility: Supports charging/protection for 3.7–120V lithium and acid batteries using the builtin switching output mechanism. Robust under real conditions: Stable operation under fluctuating loads with a switching output design that prevents harmful voltage spikes. Easy setup and recalibration: Long press to enter setup mode, adjust values using the / and stop buttons, and perform a factory reset by pressing both buttons at poweron. What makes it stand out Combines broad input voltage support with fine 0.1V control accuracy for use across many battery types and voltage ranges. Onboard potentiometers (RP1, RP2) give immediate, tactile control for field tuning without removing the board from your system. Designed for reliability in industrial and powermanagement contexts where consistent switching and spike outputs matter. Typical applications Battery maintenance/servicing: Precise charge/start and disconnect settings for maintaining battery health during storage or regular servicing cycles. Renewable energy and offgrid systems: Set accurate charge/disconnect thresholds for solar charge controllers, small inverter systems, and battery banks. Industrial power management and backup systems: Protect UPS batteries, telecom power supplies, and equipment that require stable charging control under variable load conditions. Quick setup notes Select the correct model for your battery voltage range: XHM603 for 12–24V systems or XHM604 for 6–60V systems. Power the board with DC 6–80V input, set charge and cutoff thresholds to 0.1V resolution. Use RP1 to set the charge start voltage and RP2 to set the disconnect voltage; use the onboard buttons for digital adjustments and longpress entry to access setup mode. Factory reset is available by pressing both buttons at poweron for recalibration. Compatible models and specifications (as provided) Models: XHM603 (12–24V), XHM604 (6–60V) Input support: DC 6–80V Display/control resolution: 0.1V Control tolerance: ±0.1V Battery support: 3.7–120V lithium and acid batteries Adjustment controls: Onboard buttons, potentiometers RP1 (charge), RP2 (disconnect) Output type: Direct/switching output with stable performance under load If you need reliable, accurate, and easytoconfigure charging control for a range of battery systems, the XHM603/XHM604 compatible circuit board provides the precision and industrial stability required for maintenance, renewable, and powermanagement applications.