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BT-302 Battery Tester

About the BT-302:
The BT-302 is a handheld, quick-response tester designed for accurate and economical measurement of battery internal resistance, conductance, inter-connection strap resistance, and voltage. It helps identify weak batteries to ensure the performance and reliability of your power systems.

Capable of testing Valve Regulated Lead Acid (VRLA), Vented Lead Acid (VLA), GEL, and Ni-Cd batteries, the BT-302 is widely used by service providers, maintenance teams, and utilities for comprehensive battery condition management in telecom networks, data centers, power utilities, and industrial fleets.

Key Features

  • Multilingual interface: English, Spanish, German, French, and more

  • Two-in-one function for internal resistance and conductance testing

  • Three-clamp set for both internal resistance and inter-connection testing

  • Wide test range up to 6000 Ah and 16 V per cell

  • Fast and repeatable measurements in just seconds

  • Advanced AC-signal discharge method for high accuracy

  • User-friendly 4.3” TFT touch screen and keypad controls

  • Universal micro-USB port for firmware updates and data export

  • PC software for data analysis, trending, and reporting

  • Durable Li-ion battery with 8–12 hours field operation

Technical Specifications

Applications:

  • Single Lead-Acid or Ni-Cd cells or strings (1.2 V, 2 V, 6 V, 12 V) up to 6000 Ah

Measurement Range:

  • Internal resistance: 0.001 mΩ – 100 mΩ

  • Inter-connection resistance: 0 – 65 mΩ

  • Conductance: 100 – 19 990 Siemens

  • Voltage: 0.000 – 25 V

Resolution & Accuracy:

  • Internal resistance: 0.001 mΩ (±2 %)

  • Inter-connection: 0.01 mΩ

  • Voltage: 1 mV (±0.5 %)

Storage & Power:

  • 100 000 cells internal memory; unlimited via USB export

  • Li-ion 4000 mAh battery, 8–12 h working time

  • Data transfer via micro-USB

  • Display: 4.3″ TFT touch LCD (272 × 480 px)

  • Weight: 0.45 kg (main unit)

  • Dimensions: 186 × 98 × 40 mm

  • Housing: Acid-resistant ABS Santoprene over-mold

Protection & Standards:

  • Auto-reset disconnect; reverse polarity protection

  • Operating temp 0–40 °C; storage –20–50 °C

  • CE marking / EMC compliant

Application

  • Telecom and communication power systems

  • Uninterrupted Power Supplies (UPS)

  • Power utilities and substations

  • Data centers, hospitals, and education facilities

  • Forklift and traction battery maintenance

  • Mining, refinery, and offshore platforms

  • Battery manufacturing and quality inspection

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