Extech Battery Capacity and Condition Tester - BT100

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Measure battery condition and capacity without disconnecting the battery. With a continuous testing mode you get a better picture of the overall condition of the battery instead of a snapshot reading.

Extech Battery Capacity and Condition Tester - BT100

AC milliohm meter checks battery condition in seconds while the battery is still in service


  • On-line testing without disconnecting the battery
  • Simultaneously measures DC Voltage and AC Milliohms
  • Datalogger stores up to 999 tests manually or 9600 sets in continuous mode
  • With a long battery life of 7 hours for extended battery testing
  • Auto power off to save battery
  • Includes Windows compatible software for downloading readings to a PC for better analysis of data
  • 1 year warranty

There is no substitute for a properly functioning and charged battery. Batteries can suffer from a number of problems including sulfation, acid stratification and repeated incomplete charging.

Other battery testers claim to give a battery condition but they only give a snapshot of battery performance at a particular time. The Extech Battery Capacity and Condition Tester allows you to continually test the DC voltage and AC milliohms with up to 9600 sets of data.

This gives the best picture possible of the functioning and over all condition of a battery. With the added ease of testing a battery while in service for the most convenient testing possible. This instrument comes complete with Windows compatible software which makes analysis of readings a snap.

Graph the data and analyze it in a more sensible way with a PC. The BT100 Battery Capacity and Condition Tester User Manual is attached to this page to answer all additional questions.


  • Resistance Range: 40mΩ, 400mΩ, 40mΩ, 400mΩ,
  • Resistance Resolution: 10μΩ, 100μΩ, 1mΩ, 10mΩ
  • Resistance Basic Accuracy: ±(1% reading ± 8d)
  • Voltage Range: 4V, 40V
  • Voltage Resolution: 1mV, 10mV
  • Voltage Basic Accuracy: ±(0.1% reading ±6d)
  • Max Input Voltage Range: 50VDC
  • Power: 6 AAA batteries
  • Battery Life: 7 hours
  • Dimensions: 9.75 x 4 x 1.75" (250 x 100 x 45 mm)
  • Weight: 17.5oz (500g)

Unit Ship Weight: 2 lbs

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