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Opus BT-C3100 v2.2 4 Bay Digital Battery Charger

Opus BT-C3100 v2.2 Battery Charger

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Price: $38.99

Stock Status: In Stock

Product Details

Opus BT-C3100 v2.2 4 Bay Digital Battery Charger


Product Highlights:

  • Modes: Charge, Discharge, Test, Quick Test and Refresh
  • Output Current – up to 1A x 4 channels (selectable 200mA, 300mA, 500mA, 700mA, 1000mA) or 2A x 2 channels
  • Backlit digital display showing battery voltage, charge/discharge current, charging time, battery capacity, etc.
  • The quick test mode tests the battery impedance
  • The charger integrates the minus delta voltage for NiCd or NiMh battery charging termination, and for Li-ion batteries charging to 4.2V with pre-selected current

Package Contents:

  • OPUS BT-C3100 v2.2 digital battery charger
  • Standard US power plug
  • User Manual


  • 4 independent channels. Most chargers have some channels connected together but not this one. You can have each channel doing a different thing, one could be analyzing while another is charging, they could all be charging at different rates, the sky is the limit.
  • Internal resistance quick battery test mode checks internal resistance of batteries
  • Discharge testing up to 1A checks that your batteries really have as many mAh as they say they do.
  • Charging up to 2A per channel (up to 2 batteries) or 1A per channel (up to 4 batteries) allows very fast battery charging.
  • Refresh mode allows you to cycle batteries automatically
  • Charges Li-ion, NiMH, and NiCd
  • Can be set to 3.7V LiFeO4 charging or 4.35V high voltage li-ion charging by a switch on the PCB. Default li-ion charging mode is 4.2V CC/CV.
  • Minus delta voltage charging for NiCd/NiMH reliable charging.
  • New backlit LED display tells you information


Input – AC 100V-240V 50/60Hz or DC 12V 2A
Output Current – up to 1A x 4 channels (selectable 200mA, 300mA, 500mA, 700mA, 1000mA) or 2A x 2 channels

Compatible with:

3.6V/3.7V Lithium Ion Batteries – 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650

Dimensions (L x W x H): 6.10" (155mm) x 3.16" (80mm) x 1.73" (44mm)

Average Rating: 5 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
Great features. November 8, 2018
Reviewer: Anonymous Person from Peru, IN United States  
Purchased on the recommendation of others. For my purposes this charger provides all functions including testing and discharge etc. Good value and performance. Highly recommended.

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  0 of 0 people found the following review helpful:
Best charger I have found. July 12, 2018
Reviewer: Bill from Yadkinville, NC United States  
I already had an Opus BT-C700 for Nicads & NiMhs & needed one for lithium 18650s. After researching what is available, I ordered the BT-C3100 V2.2. It works great! I like being able to monitor all the parameters such as voltage, charge or discharge current, MaHrs put it, etc. The voltage reading is a little low but the cutoff point seems to be 4.2V like it should be.

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