WESTOBiG Kelvin Four-Terminal Battery Tester — Upgraded 0–100V, 0mΩ–200Ω with Data Logging & Color Display

WESTOBiG's Kelvin four-terminal battery tester is a compact digital analyzer that measures voltage and internal resistance for a wide range of batteries with high accuracy and saved test records.

This handheld battery meter combines four-terminal (Kelvin) sensing, preset data comparison, and color display clarity to help technicians, hobbyists, and fleet managers evaluate AA cells, button batteries, lithium packs, and car batteries. It works across 0 to ±100V and resistance readings from 0mΩ to 200Ω, and stores results for later export to a PC for review.

How does Kelvin four-terminal sensing improve measurement accuracy?

Kelvin four-terminal sensing separates the current path from the voltage-sensing path so the meter excludes the test lead resistance from the reading. That means very low resistances—below 0.1 Ω—can be measured reliably, which is crucial for assessing battery internal resistance and connection quality. The included Kelvin clip cables make it simple to apply the method to small cells or large terminals.

• Eliminates lead-wire resistance for truer low-ohm readings
• Detects small changes in internal resistance that signal wear
• Works with tight terminal contacts using the included Kelvin clip

What battery types and ranges will this tester handle?

The device supports a broad selection of chemistries and sizes: disposable cells, rechargeable coins, lithium packs and automotive lead-acid batteries. Voltage measurement covers up to ±100V DC (do not apply AC), and the resistance scales span from milliohms up to 200 ohms to accommodate tiny cells and large battery banks. It's suitable for both bench use and field diagnostics.

• Voltage range: 0 to ±100V DC — do not use AC
• Resistance range: 0mΩ to 200Ω across multiple scales
• Tests AA/AAA, button cells, lithium, lead-acid, and car batteries

How can presets and data storage speed up repeated testing?

The meter lets you define up to eight preset pass/fail criteria so you can quickly screen batteries against your standards without recalculation. Every test is automatically saved to internal memory and can be exported to a PC as an Excel file for batch analysis and record-keeping. This workflow reduces manual logging and simplifies trend tracking across many batteries.

• Eight user presets for quick pass/fail comparisons
• Automatic record saving to internal memory
• PC export via Excel for analysis and archive

What does the display and physical design offer for daily use?

Rather than a monochrome readout, the meter uses a color HD screen with a clear layout to show voltage, resistance, and status flags at a glance. The housing and controls are ergonomically arranged for handheld use, and the included Kelvin clip cable supports both small and large battery terminals. Altogether the design speeds interpretation and reduces measurement errors.

• Color HD display for clearer, faster readings
• Ergonomic handheld form for field and bench work
• Includes Kelvin clip test lead for versatile connections

Who is this for: The WESTOBiG Kelvin four-terminal battery tester is aimed at technicians, electronics hobbyists, maintenance personnel, battery refurbishers, and fleet managers who need reliable voltage and internal resistance measurements across many battery types. If you compare cells frequently, validate battery packs, or maintain vehicle batteries, this meter provides accurate low-ohm readings, preset testing, and exportable records to streamline diagnostics and quality checks.