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Battery Charger Analyzer Tester BT-C3100/C3400 V2.2

Regular price $54.99 USD
Regular price $69.95 USD Sale price $54.99 USD

Battery Charger Analyzer Tester for Li-ion NiMH NiCd Rechargeable Batteries C3400 BT-C3400 AA AAA C 18650

Introducing the Opus C3100 / C3400 Battery Charger – your versatile solution for charging, discharging, conditioning, and analyzing rechargeable batteries. This advanced charger is designed to accommodate nearly all Li-ion, NiMH, and NiCd consumer cylindrical cells, offering flexibility and convenience for a wide range of battery sizes.

Compatible Sizes:

  • NiMH/NiCd: AAAA, AAA, AA, A, C, SubC
  • Li-ion: 10440, 14500, 14650, RCR123A (17340), 17500, 17670, 18350, 18500, 18650, 19670, 18650, 25500, 26500, 26650

Key Features:

  • Four Independent Channels: Program each channel individually or operate all together, allowing for simultaneous charging, discharging, conditioning, or analysis of Li-ion, NiMH, or NiCd rechargeable batteries.
  • Backlit LCD Display: Digitally showcases capacity, voltage, time elapsed, and current for clear and concise monitoring.
  • Adjustable Charging Rate: Customize charging rates from 200 to 2000 mA, with a maximum of 1000 mA for all four channels.
  • Five Modes of Operation: Choose from Charge, Discharge, Discharge Refresh, Charge Test, and Quick Test for each channel to suit your specific needs.
  • Negative Delta V Full Charge Detection: Ensures optimal charging for NiMH/NiCd batteries.
  • CC/CV Charging for Li-ion: Utilizes Constant Current/Constant Voltage for efficient and safe charging of Li-ion cells.

Adapter Power Supply:

  • Input: 100 - 240 VAC, 50 - 60 Hz
  • Output: 12Vdc 3.0A


  • Charge Current: Maximum 2000 mA (1000 mA max for all four channels)
  • Maximum Discharge Current: 1000 mA (700 mA for NiMH/NiCd)
  • Maximum Charging Capacity: 20,000 mAh
  • Operating Temperature: 0 to 40 degrees Celsius

Package Includes:

  • Opus C3400 Battery Charger
  • Wall Adapter Power Supply
  • DC Power Car Adapter
  • Operating Manual


  • Brand Name: Opus
  • Quick Charge: Yes
  • Data Transmission: No
  • Intelligent Charge: Yes
  • Certification: CE

Experience intelligent and efficient battery management with the Opus C3400 – Order now for a reliable and feature-rich charging solution.

Opus BT-C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger For Li-ion NiCd NiMH AA AAA 10440 14500 18650 17335 17500 Rechargeable Batteries

This charger is a analyzing LiIon and NiMH charger, this means the charger can both charge and discharge while measuring. The total number of function is large and this means the technical section in this review is very large.

When the charger is turned on, it displays test where all the text can be seen.

When startup is finished it is possible to select mode.


Item type:Battery Charger

Voltage update rate is the 30s instead of 60s.

Charging voltage is regulated to 4.7V instead of 5.0V, thus loading on power adapter when batteries are flat is less. 5.0V charging voltage has a problem in regulating the correct current level due to this overloading current on the power adapter, which leads to Panasonic brand Li-ion batteries showed wrong charging capacity value ( + 25 percent ). With 4.7V charging voltage, the load on power adapter is greatly reduced and thus can make all types of batteries charged properly.

4.35V charging time can be very long because charging current is regulated in entering the CV stage at 4.12V, which is same as 4.2V type. Now, 4.35V charging algorithm is changed to 4.27V.

Better safety feature: PCB temperature was used to in controlling fan on / off only with 2.0V, now this function is enhanced so that temperature is monitored for entering thermal shutdown mode when an excessive high temperature is reached. It is especially helpful when the fan is not running and which can lead to plastic meltdown happening.

New fan cover provides better protection for the cooling fan.

Charging current range: 200mA, 300mA, 500mA, 700mA, 1000mA, 1500mA, 2000mA

Discharge current range:200mA, 300mA, 500mA, 700mA, 1000mA ( Li-ion batteries only )

Max. charging capacity: 20000mAh

Voltage deviation: < 0.03V @ 4.2V

Current deviation: < 5pct

Brand: Opus

Type: Charger

Model: BT-C3100 V2.2

Plug: EU adapter, UK plug, US adapter

Charging Cell Type: Lithium-Ion, Ni-MH, NiCd

Compatible: 10440,14500,16340,18650,18500,26650,17500。

Charging Cell Qty: 4

Input Voltage: AC 100~240V 50/60HZ

Output Voltage: DC 12V, 3.0A

LCD Screen: Yes

Circuit Detection: Yes

Protected Circuit: Yes

Short Circuit Protection: Yes

Over Voltage Protection: Yes

Over Charging Protection: Yes

Over-Discharging Protection: Yes

Package Include:

1X Opus BT - C3100 V2.2 Intelligent Battery Charger

1X Power Adapter

1X English User Manual