VR452 Battery Internal Resistance Tester & Voltmeter DC 4–12V
VR452 Battery Internal Resistance Tester & Voltmeter DC 4–12V
VR452 Internal Resistance Tester & Battery Voltmeter
Get precise, professional-grade battery diagnostics with the VR452 DC 4–12V Internal Resistance Tester. Featuring a dual digital display with a red voltage readout and blue internal resistance readout, this compact module delivers accurate, at-a-glance measurements for lab technicians, electronics hobbyists, and battery engineers alike.
Using a 4-wire measurement system with a 1 kHz AC signal, the VR452 eliminates lead resistance errors for highly reliable readings. Its mΩ/Ω auto-switching display keeps operation intuitive, while the wide DC 4–12V operating voltage means it adapts effortlessly to a broad range of bench setups and field applications.
Made in Mainland China.
Key Features
- Accurate 4-Wire Measurement: 1 kHz AC signal method eliminates contact resistance errors for trustworthy voltage and internal resistance readings.
- Wide Operating Voltage: DC 4–12V input adapts to multiple power supply scenarios — ideal for diverse lab and workshop environments.
- Dual Color Display: 0.56" dual digital display — red for voltage, blue for internal resistance — for instant, clear readability.
- Auto Unit Switching: Automatically switches between mΩ and Ω, streamlining your workflow without manual adjustments.
- Compact & Easy to Install: Measures just 48 × 29 × 22 mm, fitting neatly into custom enclosures, DIY testers, or professional lab equipment.
- Stable Low Power Draw: Only 8 mA standby / 10 mA operating current keeps energy consumption minimal.
Full Specifications
| Model | VR452 |
| Material | Plastic + Metal |
| Operating Voltage | DC 4–12V |
| Standby Current | 8 mA |
| Operating Current | 10 mA |
| Measurement Method | 4-wire system, 1 kHz AC signal |
| Voltage Measurement Range | DC 0.00–45.0 V |
| Internal Resistance Range | 00.0 mΩ–999 mΩ / 1.00–2.00 Ω |
| Unit Display | mΩ / Ω automatic switching |
| Display Size | 0.56 inch dual digital |
| Display Colors | Red (voltage) / Blue (internal resistance) |
| Product Size | 48 × 29 × 22 mm |
| Package Contents | 1 × VR452 tester module (batteries not included) |
4-Pin Wire Definition
- Red — I+
- Black — V+
- Green — I−
- Yellow — V−
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Frequently Asked Questions
Q: What types of batteries can the VR452 internal resistance tester measure?
A: The VR452 battery internal resistance tester is compatible with a wide range of rechargeable and non-rechargeable cells, including lithium-ion, LiFePO4, NiMH, NiCd, and lead-acid batteries, as long as the supply voltage is within the DC 4–12V operating range and the battery voltage falls within the 0.00–45.0 V measurement range.
Q: Why use a 4-wire measurement method instead of a 2-wire method?
A: The 4-wire (Kelvin) measurement method uses separate current-carrying and voltage-sensing leads, which eliminates errors caused by the resistance of the test leads themselves. This makes the VR452 significantly more accurate than standard 2-wire testers, especially when measuring very low internal resistance values in the mΩ range.
Q: Does the VR452 come with a power supply or batteries?
A: No — the VR452 module requires an external DC 4–12V power supply and does not include batteries or a power adapter. Please ensure you have a suitable power source available before use.
Q: Can this module be embedded into a custom enclosure or DIY project?
A: Yes. At just 48 × 29 × 22 mm, the VR452 is specifically designed for integration into custom battery testers, DIY lab instruments, or professional measurement enclosures. Its compact footprint and standard 4-pin wiring make it straightforward to incorporate into your own design.