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

- Purplish Blue EU Plug

Charge Discharge Test Refresh 4 Channels for Li-ion NiCd NiMh Batteries
    COD This product supports COD on delivery. Suggestions: Do not place orders with non-COD products, otherwise you will not be able to choose COD payment method.
    Ship between: May 30 - Jun 01, Estimated Shipping Time: business days Order Processing Time may require a few days. Once dispatched from warehouse, Shipping (or Delivery) Time depends on the Shipping Method.
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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

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



Brand: Opus
Model: BT-C3100 V2.2
Type: Charger
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


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

Dimensions and Weight

Product weight: 0.2340 kg
Package weight: 0.5700 kg
Product size (L x W x H): 14.40 x 9.80 x 3.90 cm / 5.67 x 3.86 x 1.54 inches
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 - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug
Opus BT - C3100 V2.2 Digital Intelligent 4 Slots LCD Battery Charger for Li-ion NiCd NiMh Batteries - Purplish Blue EU Plug

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Customer Reviews

4.89 out of 5
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See all 1502 reviews Write a Review
  • Volha
    Yes (2) Color: Purplish Blue Size: EU Plug
    Показатели напряжения теперь обновляются каждые 30 секунд, что в 2 раза чаще, чем в предыдущей версии.
    Исправлены неточности в показаниях мАч на некоторых Li-Ion аккумуляторах (в частности Panasonic NCR18650B, NCR18650PF). Для этого максимальная амплитуда напряжения при заряде была снижена с 5В до 4.65В).
    Улучшена работа алгоритма измерения нагрева платы контроллера. Устройство, с помощью кулера, теперь более эффективно поддерживает оптимальную температуру, не допуская перегрева, что особенно важно при заряде/разряде Li-ion аккумуляторов.
    Погрешность измерения силы тока во время заряда/разряда снижена с 5% до 3%. Точность замера напряжения аккумуляторов также повышена.
    Удалена функция предварительной зарядки с помощью импульсного тока. Сделано это для предотвращения зарядки при неправильной установке аккумулятора в слот. Ранее, устройство определяло перевернутую батарею, как имеющую напряжение в 0В (т.е. полностью разряженную и требующую предварительной зарядки) и начинало ее заряжать.
    Добавлена функция автоматической подзарядки для Li-ion аккумуляторов, устраняющее проблему разряда батареи после полного заряда (через устройство, а также из-за саморазряда). Подзарядка активируется автоматически при снижении напряжения в аккумуляторе до 4.12В.
    Уменьшен нагрев Ni-MH аккумуляторов во время зарядки.
    Время полной зарядки 4.35В и 3.7В аккумуляторов оптимизировано. CV режим зарядки для таких батарей теперь стартует при напряжении 4.26В и 2.8В соответственно.
    греется вентилятор, немного завышает емкость акумуляторов

    May 24,2016

  • p5bdkw
    Yes (2) Color: Purplish Blue Size: US Plug
    BT-C3100 V2.2, An Excellent Charger
    Backlit screen (will turn it off after 20 seconds)
    Backlit can be turned on permanently by pressing "DISPLAY" for 3 seconds.
    Charges Ni-Cd, NiMH and Li-ion batteries.
    Rubber feet.
    Approx. 3/16" bottom clearance
    6 internal temperature sensors.
    Small fan to exhaust heat.
    Fan noise has been improved from previous version (BT-C3100 V2.1).
    Excellent build quality.

    Has 5 MODES:

    Charges battery to maximum capacity.

    Discharges battery. Reduces the memory effect in the battery.

    Discharges, then charges battery 3 complete cycles to optimize it's
    maximum capacity.

    Checks the capacity of the battery.

    The charger checks the dynamic internal battery resistance.
    Consult manual for further details.

    This is an excellent, fun, easy to use, charger, that gives you total control of how
    you want to charge and maintain your batteries. A big plus is the ability to get the
    capacity of the batteries. The fan noise is considerably less annoying than the one
    on the V2.1 charger, IMHO. This charger is a great companion to my XTAR VP2.

    GearBest got it to me, fast!!!

    May 03,2015

  • Lazzaro20
    Yes (1) Color: Purplish Blue Size: EU Plug
    Good charger
    This charger meets all my needs:
    It has a single channel charge, that is, you can upload an unlimited number of batteries, so that only one, two, three or all four simultaneously. This is important for me because I have a number of devices that only need a battery or three.
    Ordinary charger can only pairs (ie 2 or 4 at a time) load.
    You can combine the types of batteries colored, so you can simultaneously charge different capacity NiMH batteries and lithium ion batteries.
    Each span can individually adjust the charging current and the function.
    Functions dominates the charger following:
    * Download (Sure)
    * Exhaust (in order to avoid any memory effects with NiMH)
    * Refresh (charger repeatedly discharge and charge cycles until improvement in battery capacity you get more. So you can old batteries, or those who have long remained, still breathing a little 'life)
    However, Opus can also deal with Li-Ion batteries, and I have the chance to request a particular device in your home. Moreover, the battery of tests (measurement of internal resistance).
    I hardly use this feature however.
    A fan, the device is also to cool the batteries, which should become warm during charging. I was able to observe that the fans have already activated, very hot but the batteries were not.
    Conclusion: excellent charger handyman.

    Oct 28,2015

  • GearDeal
    Yes (0) Color: Purplish Blue Size: EU Plug
    Opus BT-C3100 Version 2.2
    Chargeur universel intelligent livré dans une boite en carton avec une notice d'utilisation et un adaptateur EU.
    La finition du produit est correcte mais le plastique pas assez costaud pour lui offrir une
    résistance aux éventuelles chutes.
    A part ça, ce chargeur est intéressant du point de vu de ses possibilités et de son prix.
    Durant le chargement, le ventilo, de temps à autre, se met en marche et se fait entendre pendant quelques secondes.
    Globalement satisfait on verra dans le temps.

    This Opus version comes in a nice carton box with EU adapter and an operating
    instructions notice.
    Charger build quality is correct but plastic material is not strong enough in case of drop.
    Easy to start and use.
    One can easily follow charging phases individually and adjust features using different mode.
    Charging time is quiet fast.
    While charging fan become noisy for a few seconds (time to time)
    For now satisfied hope it will last.
    Last Gearbest price for this item is very competitive

    Vidéo de déballage /Unboxing :

    Feb 25,2017

  • Roman
    Yes (1) Color: Purplish Blue Size: UK Plug
    even better
    Bought it as a replacement to my 1st version of bt-c3100 by powerfocus that broke after inserting the battery in opposite way.
    It does much better job: you can top up battery that has for instance 4.16V - while previous version just notified about full battery
    It is much less obtrusive less noise from the fan, which works quieter and is on only when required.
    It does charging in some different way, battery that is old and has high internal resistance charges with smaller current, ends of charging cycle with smaller current than previous version of the charger
    Can charge two battery with 2A while previous version often just reset itself upon choosing 2 slots with 2A charging
    Overall I am very very happy about purchase, one can experience that this one is just better more refined device than previous one, however in the meantime I have notice there is new more advance charger available here - unfortunately
    The price here is the best I have came across by 30% than somewhere else!!!
    I wish it be able to charge with 3A....
    1 month in transit (but its my fault I have chosen Nederland surface post)

    Dec 08,2015

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There are two key factors which will affect the time you receive your items.

Item processing time
After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.
Shipping methods
China Warehouse:
Shipping Type Country or Region Arrive within 1-7 Days Arrive within 8-15 Days Arrive within 16-30 Days Arrive within 31-45 Days Average Time (Days)
Unregistered Air Mail or Registered Air Mail United States 0.52% 44.87% 49.88% 3.5% 18.13
Spain, United Kingdom, Italy, Germany, France & Portugal 5.18% 43.44% 48.34% 1.17% 15
Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic 2.96% 40.34% 52.54% 3.74% 18.66
Russia 0% 4.45% 84.41% 11.1% 28
Japan, Korea 0% 21.30% 68.80% 9.66% 17.75
Brazil 0% 0% 23.91% 72.09% 38.6
Turkey 0% 37.75% 59.05% 3.1% 20.33
Thailand, Singapore & Malaysia 0% 40.39% 56.12% 2.6% 16.2
Other countries 0.7% 38.79% 47.94% 8.56% 23.57
Priority Line United States 12.28% 79.05% 7.4% 0.52% 11.75
Spain, United Kingdom, Italy, Germany, France & Portugal 8.44% 66.56% 23.45% 0.45% 13.55
Russia 0% 3.48% 75.79% 20.04% 31
Brazil 2.21% 6% 61.29% 25.46% 30
Turkey 20.42% 77% 3% 0.08% 10
Australia 7.67% 86.60% 5.68% 0% 11
Korea 97.54% 1.57% 0.89% 0% 7
Japan 95.80% 2.09% 0% 0% 6.84
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8.45
Other countries 22.33% 30.8% 27.62% 17.64% 18.65
Expedited Shipping ALL countries(EMS) 3.8% 46.8% 26% 15% 14.8
ALL countries(DHL) 65.8% 25.75% 3.86% 0.37% 6.72
GW Warehouse: Typically 3-5 days to the UK, 3-7 days to other European countries.
USA Warehouse: Generally, 3-7 days to a USA address.
ES Warehouse: Generally, 2-5 days to the Spain, 3-7 days to the Portugal.
Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.
Note: This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control. Generally speaking, we offer free shipping for Opus BT - C3100 V2.2 Smart Battery Charger to United States (US, USA), United Kingdom (UK, GB), Germany, Italy, France, Spain, Portugal, Poland, Brazil, Russia, Japan, Greece, Austria, Hungary, Slovakia, Czech Republic, Ireland, Lithuania, Israel, Denmark, Norway, Sweden, Canada, Australia, Netherlands, Korea, Turkey, Mexico, Ukraine, Romania, Columbia, Thailand, Singapore, Malaysia etc. Please choose the shipping methods for the final price.

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Do you want to bulk buy ? Please submit your wholesale inquiry below. Please note we usually don’t offer free shipping on wholesale orders, but the wholesale price will be a big bargain.

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