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  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
  • Opus BT - C3100 V2.2 Smart Battery Charger
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Opus BT - C3100 V2.2 Smart Battery Charger

Charge Discharge Test Refresh 4 Channels for Li-ion NiCd NiMh Batteries

4.9 1012 Reviews
Warehouse Ships on May 26
China
Selected EU PLUG

CUSTOMER REVIEWS

  • Chris

    May/25/2017 15:25:30
    Pros:
    - Fast Charging and Decharging for up to 4 Cells - Wide Compatiability (NiMh, NiCd, LiIon; AA, AAA, C, 18650, 14500, 16340, 10440, 10340, 18650, 26650, … - Informative Display - Temperature-controlled fan (V 2.2) - Good built-quality - Perfect for this price (ca. 28€)
    Cons:
    - Biggest Con: not suitable for all my NiMh-AA-Cells. Eneloops and Amazon-Basic-Cells (1900 an 2000mAh) were charged normal to full capacity and a end-voltage of ca. 1,5V (falling after end-of-charge). But my brand new Panasonic Evolta 2450mAh (12 pieces) were charged only to half capacity and a end voltage of ca. 1,4V, than the opus shows „full“. This happens randomly to one, two, three or all four slots in all programs (Charge-Test, Decharge+Charge, Decharge-Refresh). Starting another Decharge-Refresh-Cyklus with letting the Evoltas in the charger, other slots / cells were not charged full – so it seems to be not a faulty slot but the BT-C3100 cannot handle the Evoltas correctly. Charged the same Evoltas by my other Chargers (Technoline BC700 and Voltcraft ChargeManager 410) there are no problems at all and the cells are reliable charged fully (ca. 2500mAh). - Fan noise, even when charging / decharging 4 NiMh-Cells - Fan noise is ok in lower speed, but is really annoying when turning with higher speeds (scratching, scrapeing sound)
  • Ильдар

    May/24/2017 17:09:16
    Pros:
    Зарядник очень хорош. Заряжает всё что в него влазит.
    Cons:
    Размер и громкие кнопки
  • wlad

    May/24/2017 15:30:50
    Pros:
    everthing perfect!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    Cons:
    Maybe it would be nice if you could pack you package a little bit safer. Its a long way around the world
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Main Features:
NEW LED back light displays charging / discharging / quick test / circuit more clearly in the dark
NEW refresh mode can show you batteries' capacity, letting you know real magnitude
NEW added quick test mode to test the battery impedance
Four working mode available at user's choice: Charge, Discharge, Test, Quick Test and Refresh
● 4 independent charging slots charge rechargeable batteries of different types and sizes and with different capacities at the same time
● Charging current can be selected to be 200mA, 300mA, 500mA, 700mA or 1000mA ( 1500mA and 2000mA can be applied when only slot 1 or 4 is selected ). Default discharging current is 500mA
● Integrates the minus delta voltage ( -ΔV ) for NiCd or NiMh batteries charging termination, and for Li-ion batteries charging to 4.2V with pre-selected constant current. ( 3.7V Li-FeO4 and 4.35V high voltage batteries charging mode can be selected through switch on board )
● Easy-to-read LCD with back light showing battery Voltage, Charge / Discharge Current, Charging Time, Battery Capacity, etc.
● Includes overheat detection to protect rechargeable batteries and charger itself from overheating
● Designed for AA ( LR6 ) and AAA ( LR3 )NiCd, NiMH or 3.7V Li-ion rechargeable batteries in size type of 18650, 14500, 16340, 10440, also compatible with 10340, 18650, 26650, 26500 ( printed on the package ) and 17670, 18490, 17500, 17335 ( printed on the product )
● Operating temperature: 0 - 40 deg.C
● Max charging capacity: up to 20000mAh
● Power adapter: DC 12V, 3.0A ( output ), 100 - 240V, 50 / 60Hz ( input )
● Please NOTE: batteries are not included

Highlights:
1. Voltage update rate is 30s instead of 60s.
2. 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 problem in regulating the correct current level due to this over loading current on power adapter, which lead 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.
3. 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.
5. 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 excessive high temperature is reached. It is especially helpful when fan is not running and which can lead to plastic melt down happening.
6. New fan cover provides better protection for cooling fan.
7. Charging current range: 200mA, 300mA, 500mA, 700mA, 1000mA, 1500mA, 2000mA
8. Discharge current range:200mA, 300mA, 500mA, 700mA, 1000mA ( Li-ion batteries only )
9. Max. charging capacity: 20000mAh
10. Voltage deviation: < 0.03V @4.2V
11. Current deviation: < 5pct

Specification

General

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
Charging Cell Qty: 4
Input Voltage: AC 100~240V 50/60HZ
Output Voltage: DC 12V, 3.0A

Functions

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

Dimension and Weight

Product weight: 0.2340 kg
Package weight: 0.5200 kg
Package size (L x W x H): 16.00 x 22.00 x 5.00 cm / 6.3 x 8.66 x 1.97 inches

Package Contents

Package Contents: 1 x Opus BT - C3100 V2.2 Intelligent Battery Charger, 1 x Power Adapter, 1 x English User Manual

 Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

This charger is an analyzing charger for LiIon and NiMH batteries, which means the charger can charge and discharge while measuring.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries 

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:


When display is flashing it is possible to select mode and current.
Using the slot button it is possible to reselect a slot and change parameters for it, also when charger is working.
When putting multiple batteries in the charger at the same time, it is possible to select mode and current simultaneous for all of them (Very nice).

When charging or discharging it is possible to use the DISPLAY button to select between V, mA and mAh.
The display button can also be used when the charge/discharge is finished, but the charger will change back to FULL display rather quickly.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

Here is an example where I have selected different functions for each slot.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

Each time a button is pressed, the light turns on for a 20 seconds.
The FULL and NULL message can also be seen.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

The charger uses an external 12 volt power supply at 3A ( see later ).
It has a fan, this is necessary to handle all four channels at full power. Even with only one channel in use the fan, it start and stop very often. The fan is not very loud, but due to the starting and stopping it is very annoying.


 Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries 

The charger uses the classical slider construction to handle most battery sizes. The slider works smoothly and can handle sizes from 32mm to 72.5mm.
For measuring internal resistance the slider is not very good, it often has a high connection resistance.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

A couple of different NiMH batteries in the charger.

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

And some LiIon batteries.

Using only slot 1 and 4, the maximum charge current is 2000mA.
In all other cases the maximum charge current is 1000mA.
The maximum discharge current is always 1000mA.

Charge currents: 200mA, 300mA, 500mA, 700mA, 1000mA, 1500mA, 2000mA

Discharge currents: 200mA, 300mA, 500mA, 700mA, 1000mA


Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries
 

The charger can easily handle 
70mm long batteries.
It is recommended to charge smaller batteries in the two center slots.
The charger has an internal switch marked with 3.7V, 4.20V and 4.35V. I have not tested this switch, because it is internal, but it might be possible to charge other Li-ion chemistries.


Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries

4.9
Price
Ease of Use
Build Quality
Usefulness
Overall Rating
  • Chris

    May/25/2017 15:25:30
    Pros:
    - Fast Charging and Decharging for up to 4 Cells - Wide Compatiability (NiMh, NiCd, LiIon; AA, AAA, C, 18650, 14500, 16340, 10440, 10340, 18650, 26650, … - Informative Display - Temperature-controlled fan (V 2.2) - Good built-quality - Perfect for this price (ca. 28€)
    Cons:
    - Biggest Con: not suitable for all my NiMh-AA-Cells. Eneloops and Amazon-Basic-Cells (1900 an 2000mAh) were charged normal to full capacity and a end-voltage of ca. 1,5V (falling after end-of-charge). But my brand new Panasonic Evolta 2450mAh (12 pieces) were charged only to half capacity and a end voltage of ca. 1,4V, than the opus shows „full“. This happens randomly to one, two, three or all four slots in all programs (Charge-Test, Decharge+Charge, Decharge-Refresh). Starting another Decharge-Refresh-Cyklus with letting the Evoltas in the charger, other slots / cells were not charged full – so it seems to be not a faulty slot but the BT-C3100 cannot handle the Evoltas correctly. Charged the same Evoltas by my other Chargers (Technoline BC700 and Voltcraft ChargeManager 410) there are no problems at all and the cells are reliable charged fully (ca. 2500mAh). - Fan noise, even when charging / decharging 4 NiMh-Cells - Fan noise is ok in lower speed, but is really annoying when turning with higher speeds (scratching, scrapeing sound)
  • Ильдар

    May/24/2017 17:09:16
    Pros:
    Зарядник очень хорош. Заряжает всё что в него влазит.
    Cons:
    Размер и громкие кнопки
  • wlad

    May/24/2017 15:30:50
    Pros:
    everthing perfect!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    Cons:
    Maybe it would be nice if you could pack you package a little bit safer. Its a long way around the world
  • Sergey Ryabov

    May/24/2017 15:04:45
    Pros:
    Самое отличное зарядное устройство.Несколько режимов зарядки,разрядки и т.д.
    Cons:
    Пишут что минус вентилятор быстро выходит из строя.
  • Nemo

    May/24/2017 01:44:14
    Pros:
    Годный такой зарядничек. Приехал быстро. Сделан крепенько, пластик хороший, все аккуратно. Работает со всеми акками, которые удалось туда запихнуть. Можно работать с каждым слотом в отдельности по разным программам.
    Cons:
    Многие жалуются на шум вентилятора - ну да, есть что то такое, но мне не мешает. Не такой уж он и громкий. А вот провод коротковат.
  • Andreas

    May/23/2017 05:38:49
    Pros:
    great charger. no problem.
    Cons:
    none
  • Massimo

    May/21/2017 17:19:11
    Pros:
    sito da incorniciare
    Cons:
    perfetta
  • THEUVENEY

    May/20/2017 07:36:58
    Pros:
    Permet de recharger , rafraichir ,tester tous les accus NI-MH,LI-ION,NI-CD de différentes tailles ,beaucoup de possibilités avec ce chargeur ,un des meilleurs chargeurs sur le marché et a un très bon prix !!
    Cons:
    Un peu bruyant quand le ventilateur se met en marche ,sinon rien a dire !!
  • net

    May/18/2017 13:11:55
    Pros:
    Works great, I charge all the batteries. Отлично работает, все батареи аккумуляторы заряжаю.
    Cons:
    Нет минусов, все нормально работает... There are no minuses, everything works fine ...
  • Pablo Brunet

    May/18/2017 07:02:33
    Pros:
    Excellent! everythings arrived OK, fast delivery!
    Cons:
    none
  • Mikhail

    May/17/2017 07:43:38
    Pros:
    Everything corresponds to the description. Universal, multifunctional charger. Suitable are many types of batteries. Informative interface. Easy of use. Все соответствует описанию. Универсальное, многофункциональное зарядное устройство. Подходит много типов аккумуляторов. Информативный интерфейс. Простота использования.
    Cons:
    Did not notice не заметил
  • Opus bt3100 v2.2

    May/17/2017 03:02:40
    Pros:
    Super Ladegerät mit 4 einzeln zu programmierenden Schächten. Und das für knapp 28€. Bin sehr zufrieden. Es stimmt, daß man den Lüfter etwas hört, aber wenn das Gerät nicht gerade im Schlafzimmer betrieben wird, sollte man sich nicht daran stören.
    Cons:
    Keine
  • Jouni

    May/16/2017 14:33:40
    Pros:
    Good charger for 18650 li-ion batteries. shows accurately capacities, voltage, current, time.
    Cons:
    Fan is very noisy when charging,
  • battery charger

    May/15/2017 06:22:46
    Pros:
    Muito informação acerca do carregamento, muito util
    Cons:
    Barulho da ventoinha, poderia ser mais silencioso.
  • sKaru

    May/15/2017 03:01:21
    Pros:
    Build quality Easy to use Lots of options / parameters Very decent price
    Cons:
    A little noisy if put too close to a wall
  • Амир

    May/14/2017 04:37:26
    Pros:
    Один большой плюс и всё. Шикарное зарядное устройство.
    Cons:
    Минусов нет вообще.
  • Александр

    May/13/2017 15:36:06
    Pros:
    Очень качественное и многофункциональное зарядное устройство по доступной цене. Вентилятор не шумит.
    Cons:
    нет
  • Sascha

    May/13/2017 11:29:48
    Pros:
    sehr gutes Ladegerät kann ich nur empfehlen
    Cons:
    keine
  • Paddy

    May/12/2017 08:29:41
    Pros:
    Sehr gutes Ladegerät Innenwiderstand lässt sich messen refresh-funktion
    Cons:
    NICHTS
  • Arseniy

    May/12/2017 05:42:51
    Pros:
    Зарядник хорош, есть выбор тока зарядки. так же порадовали дополнительные функции типа полного разряда и тд.
    Cons:
    иногда сильно жужит кулер, а так минусов нет
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Opus BT - C3100 V2.2 Smart Battery Charger

Opus BT - C3100 V2.2 Smart Battery Charger

$29.99

Warehouse Options

  • China
Opus BT - C3100 V2.2 Smart Battery Charger

Opus BT - C3100 V2.2 Smart Battery Charger

$29.99

Size

  • US PLUG
  • EU PLUG
  • UK PLUG
  • US PLUG
  • EU PLUG
  • UK PLUG

Color

  • PURPLISH BLUE
  • PURPLISH BLUE
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