SDI CELL03 Lead Acid Pulse Load Battery Tester

The SDi CELL03 CellChecker is a portable lead-acid pulse load battery tester designed to evaluate backup batteries used in fire alarm, security, emergency lighting, and UPS systems. It tests 2V, 4V, 6V, 8V, and 12V batteries with supported capacities up to 200Ah, including sealed lead-acid (SLA), AGM, gel, and flooded types. Unlike conventional voltage-only testers, the CELL03 measures battery performance under an applied load, identifies weak or failing batteries, and displays results in approximately 15 seconds.

SDi CELL03 CellChecker Lead-Acid Pulse Load Battery Tester

The SDi CELL03 CellChecker is a professional battery testing instrument engineered to evaluate the condition and remaining charge of lead-acid batteries used in fire alarm control panels, intrusion alarm systems, emergency lighting, uninterruptible power supplies (UPS), and other critical standby power applications. Using patented pulse load testing technology, the CELL03 measures a battery's ability to maintain voltage while supplying an electrical load rather than relying exclusively on open-circuit voltage or internal resistance measurements. This testing method helps technicians identify deteriorating batteries that may appear functional during a standard voltage check but cannot reliably deliver power during an outage. The instrument supports 2V, 4V, 6V, 8V, and 12V lead-acid batteries within the manufacturer's specified capacity ranges, with testing completed in approximately 15 seconds.

The CELL03 accommodates sealed lead-acid (SLA), absorbed glass mat (AGM), gel, and flooded lead-acid battery chemistries, making it suitable for maintaining a broad range of rechargeable standby batteries. Its selectable test modes cover 2V batteries from 2-25Ah, 4V batteries from 2-25Ah, 6V and 12V batteries from 1-200Ah, and 8V batteries from 2-100Ah, with specific capacity selections determined by the manufacturer's test-mode settings. During operation, the instrument applies a controlled pulse load appropriate to the selected battery category and evaluates the resulting voltage response to assess battery condition. An eight-LED indicator system with green, yellow, and red status lights communicates the estimated remaining capacity and condition, helping maintenance personnel determine when further testing or battery replacement is necessary.

Designed for fire and life safety system inspection, preventive maintenance, and battery condition assessment, the SDi CELL03 provides technicians with a practical method for evaluating standby battery performance. Regular load testing helps identify batteries that may not maintain sufficient power during an AC supply failure, supporting the reliability of fire alarm panels, security equipment, and emergency backup systems. The instrument is relevant to battery inspection practices addressed by NFPA 72 and CAN/ULC-S536, although compliance with these standards depends on the complete inspection and testing procedure. Its pulse load measurement technology also supports battery comparison, maintenance troubleshooting, and matching batteries with similar operating characteristics.

The SDi CELL03 features a portable, battery-powered design measuring approximately 9.25 inches long, 6.25 inches wide, and 2 inches high, with a weight of approximately 32 ounces (908 grams). It operates using four AA batteries, sold separately, and includes an automatic shutoff function after 20 minutes without testing activity to conserve power. The instrument uses 48-inch rubber-coated test leads with solid copper clamps for secure connections to battery terminals. Optional accessories include the CELL01CS padded carrying case, CELL01LD plier-type test leads, CELL01RL clip-type replacement leads, and CELLPAC carrying accessory kit. Manufactured and serviced in the United States, the CELL03 provides a reusable diagnostic solution for maintaining lead-acid backup batteries in commercial fire protection, security, and electrical power systems.