
Battery Internal Resistance Tester
ZWNZT
With advanced built-in analytics, the instrument transitions from simple measurements to intelligent diagnostics to help you improve battery maintenance efficiency.


ZWNZT
With advanced built-in analytics, the instrument transitions from simple measurements to intelligent diagnostics to help you improve battery maintenance efficiency.

ZWCFD series
This instrument integrates charging and discharging functions as a versatile "one-stop" maintenance tool to ensure the reliability of your power system.

ZWCDJ series
Chargers for battery testing help you evaluate battery performance by simulating various charging conditions and measuring voltage, current, and capacity.

ZWNDY
It is a multi-functional portable tester that automatically, quickly, and accurately measures battery operating status, improving your work efficiency.

ZWFDY series
It offers multiple test modes, and a single module can monitor 24 cells simultaneously, helping you keep your equipment safe.

ZWHHY series
When the battery is offline, a single battery can be activated, which greatly reduces the workload of your daily battery testing and maintenance.

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Combines charging, discharging, activation, and online monitoring in one unit. Seamlessly switches modes to maintain battery health without manual intervention.
Utilizes intelligent high-efficiency loads (PTC) without red heat phenomena. Maintains constant current/power discharge precisely even under fluctuating voltage.
Supports SD card data storage and powerful PC management software. Automatically generates test reports, curves, and histograms, enabling unattended operation and reducing labor costs.
Behind every reliable reading is our dedicated workshop. From high-grade component sourcing to 48-hour aging tests and final calibration, we meticulously craft durability and accuracy into every unit.












We offer flexible end-to-end services and customized optimal solutions. With strict quality control ensuring reliability and concierge-style after-sales support, we create lifetime records to provide you with the best and fastest service.
We provide full-process services from pre-sales through sales to after-sales.
We have a comprehensive quality inspection process to ensure the quality of every product you receive.
Concierge-style service, creating a “health record” for every device you purchase.

Discover what our clients have to sya
At Zhiwei Electric Power, we provide a clear, efficient, and hassle-free procurement experience to ensure you quickly receive high-quality testing solutions.
Don’t just buy a product; get a solution. Send us your testing requirements, and our engineers will recommend the optimal model with a detailed technical proposal and competitive offer.
We confirm all specs via a formal Proforma Invoice (PI). Once terms are agreed upon and the advance payment is verified, your order immediately enters our production priority queue.
Every unit undergoes final QC testing before export packing. We handle shipping documentation (B/L, AWB) and provide tracking details to ensure smooth customs clearance and arrival.
It acts as a versatile 4-in-1 station: Online Monitoring, Constant Current Discharge, Smart Charging (3-stage), and Battery Activation. It is designed not just to test capacity, but to actively remove sulfation and regenerate lagging batteries.
Absolutely. With 0.001V Resolution, the equipment can pinpoint specific lagging or deteriorated cells that standard testers might miss. This high sensitivity is crucial for analyzing the internal resistance and actual capacity of every single battery.
Yes, through its built-in Activation Function. The equipment uses deep-discharge and intelligent charge cycles to reverse sulfation on the plates. This process restores the chemical activity of “lagging cells,” effectively regenerating old batteries that would otherwise be scrapped.
A battery string is only as strong as its weakest cell. Our equipment identifies “lagging cells” (weak units) through high-precision monitoring. By treating or replacing only the weak cells early, you prevent them from damaging the entire bank, saving you the cost of full-string replacement.
1、Through Unattended Operation. The integrated system automatically switches from discharge to charge modes and logs all data to an SD card. Combined with PC auto-reporting software, it eliminates the need for manual monitoring and data entry, reducing technician hours by over 70%.
2、Yes. Our high-precision monitoring identifies specific “Lagging Cells” (weak units). Instead of prematurely scrapping an entire 110V/220V string, you only replace the faulty units. Additionally, the Activation Function can regenerate older batteries, extending their useful life by 2-3 years.
3、Significantly. Our “Quick Capacity Test” evaluates battery health in just 3 to 20 minutes, compared to traditional 10-hour discharge tests. Also, the All-in-One design (Charge, Discharge, Monitor) reduces procurement costs and storage space compared to buying three separate units.