Electronic Accessories & Parts

Opus BT-C3100 V2.2 Smart Digital Intelligent 4 LCD Slots Universal

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97.9 star rating
97.9 of 100

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Battery Number
Model Number
Opus BT - C3100 V2.2
Intelligent Charge
Display screen
Quick charge
Brand Name
Standard Battery
BT-C3100 V2.2
US adapter
Charging Cell Type:
Ni-MH, NiCd, Lithium Ion
Rechargeable Battery Qty:
Input Voltage:
AC 100~240V 50/60HZ
Output Voltage:
DC 12V, 3.0A

15 Mar 2018
works fine, week tested put before feedback operability. delivered to your door courier. all satisfied.

- S****y S.
16 Mar 2018

- K********n Z.
12 Mar 2018
all is well. work. pro odor (if it's care): ???????? when first time out of the box, the nose beats straight; if the instrument worried operation on all kind of sniff specifically (if to nose ???????? straight, the smell).

- D****y K.
25 Nov 2017
place order sent by other address that ???????? ?????????? 652507 and 652425 index after all good EX007 which courier refused to send mail transferred call search and copy to open the item of no longer send and responding, resolved this problem features personal

- D****y P.
08 Mar 2018
Fast shipping and received without damage. The noise level of the fan is tolerable but not really quiet. The operation is intuitive and easy. Recommended charger and seller.

- W******d J.
07 Dec 2017
all working, second it's friend ???????? ?????? only this time, not trackable iml ??????? through the all the way was sent by tracking ???? was first

- R****n S.
25 Dec 2017
34 days delivery to Czech republic. Dispatched 6 days. I buy this charger because I need check 9capacity of my batteries. All slots are not calibrate at same level and show little different capacity results. One slot still show higher capacity then other slots. I'm not happy with this. If I want exactly capacity results then I must use only one and same slot to compare batteries capacity between each other (for pairing batteries). Over that I'm satisfied with this charger.

- M***k R.
30 Nov 2017
slightly longer delivery month. so so packaging, ??????? box inside, inside the box and completely whole all but ??????????????. like all expected as all in description. if problems-??????? feedback.

- D****a A.
09 Jan 2018
Very good charger. No complaints here.

- E*****l H.
22 Feb 2018
thank you! all is excellent!

- V*******v F.
01 Mar 2018

- S*******r B.
26 Feb 2018
all is excellent! recommend!

- R***n M.
04 Nov 2017
item received as advertised

- M**e K.
20 Feb 2018

- I**r S.
04 Mar 2018

- E****e K.
13 Dec 2017

- Anonymous
07 Mar 2018

- A**l S.
29 Nov 2017

- Anonymous Shopper
08 Nov 2017

- K************n N.
22 Oct 2017

- A*******r N.


Original Opus BT-C3100 V2.2 Smart Digital Intelligent 4 LCD Slots Universal Battery Charger for Rechargeable Battery EU/US Plug

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  
- The charging current can be selected to be 200mA, 300mA, 500mA, 700mA or 1000mA ( 1500mA and 2000mA can only be applied when only slot 1 or 4 is selected ). Default discharging current is 500mA  
- It provides four independent charging slots for rechargeable batteries. The charger can charge batteries of different types and sizes and with different capacities at the same time  
- The charger integrates the minus delta voltage ( - ΔV ) for NiCd or NiMh battery charging termination, and for Li-ion batteries charging to 4.2V with pre-selected constant current. ( 3.7 Li-FeO4 and 4.35 type high voltage batteries charging mode can be selected through switch on board )  
- The charger also includes overheat detection to protect rechargeable batteries and charger itself from overheating  
- 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  
- Easy to read LCD with back light Showing Battery Voltage, Charge / Discharge Current, Charging Time, Battery Capacity etc.  
- Designed for AA ( LR6 ) and AAA ( LR3 ) NiCd, NiMH or 3.7V Li-ion rechargeable batteries in size type of 10440, 14500, 16340, 17335, 17500, 18490, 17670, 18650  
- Ideal for office and home use  
- Operating temperature: 0 - 40 deg.C  
- Max charging capacity: Up to 20000mAh  
- Power adapter: DC 12V, 3.0A ( Output ), 100-240V, 50 / 60Hz ( Input )  
- Note: Battery 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 are 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 make better protection for cooling fan.  
7. Charging current range ( mA ): 200, 300, 500, 700, 1000, 1500, 2000  
8. Discharge current range ( mA ):200, 300, 500, 700, 1000 ( li-ion cell battery only )  
9. Max. charging capacity: 20000mAh  
10. Voltage deviation: < 0.03V  4.2V  
11. Current deviation: < 5%
Type: Charger     
Brand: Opus     
Model: BT-C3100 V2.2     
Plug: US adapter     
Charging Cell Type: Ni-MH, NiCd, Lithium Ion     
Compatible : 10440, 22650, 10340, 18650, 16340 (RCR123), 14500, 18500, 26650     
Rechargeable Battery Qty: 4     
Input Voltage: AC 100~240V 50/60HZ     
Output Voltage: DC 12V, 3.0A
LCD Screen: YES     
Auto Circuit Detection: YES     
Built-in Protected Circuit: YES     
Over Voltage Protection: YES     
Short-Circuit Protection: YES     
Over-Charging Protection: YES     
Over-Discharging Protection: YES
Battery Quantity: 4
Package weight: 0.53 kg     
Product size (L x W x H): 14.4 x 9.8 x 3.9 cm / 5.66 x 3.85 x 1.53 inches     
Package size (L x W x H): 16 x 22 x 5 cm / 6.29 x 8.65 x 1.97 inches
Package Contents: 1 x Battery Charger, 1 x US Power Adapter, 1 x English User Manual


Shipping CompanyShipping CostEstimated Delivery Time
DHL3 - 7 days
UPS Expedited3 - 7 days
EMS5 - 14 days
Post Air MailFree Shipping15 - 45 days
Return PolicyIf the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller ServiceOn-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).