YR1035 Four Wire Internal Resistance Battery Tester 18650

Meet the YR1035 Four Wire Internal Resistance Battery Tester for 18650 cells—the true four‑wire solution that delivers precise, on‑the‑spot insights into battery health. By measuring internal resistance and voltage simultaneously, this tester helps you sort, compare, and screen cells with confidence, eliminating the errors caused by test leads and contact resistance.

Designed for professional electricians and electronics hobbyists alike, the YR1035 combines a compact, portable build with advanced measurement technology. It offers true 4‑wire AC sinusoidal measurements, a battery sorting function, and a low‑power design with a built‑in 2000mAh battery for longer field use. The display presents resistance and voltage clearly on a single screen, making it easy to assess battery performance at a glance. Whether you’re performing battery matching, performance testing, or routine screening, this tester makes complex measurements simple and reliable.

With the ZR function, you can measure ultra‑low resistances down to 0.30–0.50 milliohms for highly accurate assessment of fresh and healthy cells. It supports a wide range of chemistries—including lithium ion, lithium polymer, lithium iron phosphate, alkaline, dry cell, nickel metal hydride, nickel cadmium, and button cells—so you can verify the health of diverse battery types. The device is built for real‑world use: true four‑wire measurements reduce lead effects, and its energy‑efficient design keeps battery life long and reliable in fieldwork. At intercyprus.com since 2002 — trusted for quality and reliability.

Benefits & Tips

• Efficient battery sorting—quickly group cells by comparable internal resistance to build balanced packs and improve performance.
• On‑site health checks—test new or used cells across multiple chemistries to prevent weak cells from affecting your projects.
• Ultra‑low resistance insight—activate the ZR function to measure sub‑milliohm values, ideal for Li‑ion and high‑drain cells.

Product specifications

• Model: YR1035+ / YR1030+
• Type: True four‑wire internal resistance tester (AC sinusoidal, 1 kHz)
• Measurement ranges (resistance): 20 mΩ / 200 mΩ / 2 Ω / 20 Ω / 200 Ω
• Maximum resolution: 0.01 mΩ / 0.1 mΩ / 1 mΩ / 10 mΩ / 0.1 Ω (depending on range)
• Accuracy (resistance): ranges vary (approximately 0.5%–0.7% + 5–7 counts)
• Display modes (resistance): 2000 counts for resistance, with ZR enabled showing 22.00 mΩ or 220.0 mΩ, 2.200 Ω, 22.00 Ω, 220.0 Ω
• Voltage measurement: 1 V / 10 V / 100 V
• Voltage resolution: 0.00001 V / 0.0001 V / 0.001 V
• Voltage accuracy: about 0.15% + 0.015% of range
• Display counts: Resistance up to 2000 counts; Voltage up to 99999 counts; update rate 4×/s
• Operating temperature: 10°C–40°C (storage: -20°C–60°C)
• Temperature drift: 100 ppm/°C
• Maximum input voltage between terminals: 100 V
• Power consumption: < 60 mA (≥ 20 mΩ range, backlight off at 3.7 V); < 120 mA (20 mΩ range); < 10 mA in low‑power mode; 0 mA when shutdown
• Display: Resistance up to 2000 counts; Voltage up to 99999 counts; 4×/s update
• Battery: 1 × lithium battery, 2000 mAh (included)
• Material & color: ABS, black

Package includes:

• 1 × YR1035 Four Wire Internal Resistance Battery Tester
• 1 × Built‑in 2000 mAh lithium battery (included)

Warnings / reminders

• Operate within the specified voltage and temperature ranges (≤100 V between terminals; 10–40°C ambient).
• Avoid exposing the device to moisture, excessive dust, or physical shocks.
• Use only for testing batteries; the device is not a power supply for external loads.

Providing quality and trusted service since 2002 at intercyprus.com.