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Helmet Front Mount

 -  BLACK LC0017701

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to United States  Via Flat Rate Shipping
  • Description
  • Product FAQ
  • Customer Reviews
  • Shipping & Payment
  • Wholesale Inquiry

Main Features:

1.The charging current can be selected for 200mA, 300mA, 500mA, 700mA and 1000mA. Default discharging current is 500mA.
2.It provides four independent charging slots for rechargeable batteries. The charger can charge batteries of different type and size and with different capacity at the same time
3.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.
4. The charger also includes overheat detection to protect rechargeable batteries and charger itself from overheating.
5. New added quick test mode to test the battery impedance.
6. Four Working Mode Available at User's Choice: Charge, Discharge, Test,Quick Test and Refresh.
7. Easy Read LCD with back light Showing Battery Voltage, Charge/Discharge Current, Charging Time, Battery Capacity etc.
8.Designed for AA(LR6) and AAA(LR3)NiCd, NiMH or 3.7v Li-ion rechargeable batteries in size type of 10440, 14500, 16340, 18500, 18650, 26650, 26500
9. Ideal for Office and Home use.
10. Operating temperature: 0°C-40°C
11. Max. Charging Capacity: 20000mAh
12. Power Adapter:Output: 12V DC, 3.0A; Input: 100~240V~, 50/60Hz



Type: Charger
Plug: US adapter
Compatible : 16340 (RCR123), 18650, AAA, 14500, AA, 26650, 22650
Output Voltage: AC 100~240V 50/60HZ

Dimension and Weight

Product weight: 0.2 kg
Package weight: 0.54 kg
Product size (L x W x H): 14.4 x 4 x 10 cm / 5.67 x 1.57 x 3.93 inches
Package size (L x W x H): 21.5 x 16 x 4 cm

Package Contents

Package Contents: 1 x Battery Charger, 1 x US Power Adapter, 1 x Manual
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:
  • CHARGE: Charge battery with 200 to 1000 (2000) mA.
  • DISCHARGE: Discharge battery with 200 to 1000 mA.
  • DISCHARGE REFRESH: Discharge and charge the battery 3 times.
  • CHARGE TEST: Charge, discharge and charge the battery, show how much current was discharged.
  • QUICK TEST: Measure the internal resistance of the battery.

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.


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


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


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.

DSC_4727 DSC_4729 

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


A couple of different NiMH batteries in the charger.


And some LiIon batteries.

Using only slot #1 and/or #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: 200, 300, 500, 700, 1000, 1500, 2000
Discharge currents: 200, 300, 500, 700, 1000


supportedBatterySizes DSC_4732 DSC_4731 DSC_4733 

DSC_4734 DSC_4735 DSC_4736 DSC_4737 DSC_4738 

The charger can easily handle 
70 mm 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 LiIon chemistries.


  • The LCD background light turns off 20 seconds after the last keypress.
  • The charger has very high current spikes from the supply.
  • When charging 1 battery at 0.5A the fan turns on/off all the time, it is very annoying when sitting close to the charger.
  • When charging 4 batteries at 1A the fan runs continuous.
  • It will discharge NiMH batteries with up to 0.8mA when not charging.
  • It Will discharge LiIon batteries with up to 2.1mA when not charging.
  • Power cycling will restart charging.
  • Reinsertion of batteries will restart last mode selected.
  • Falling voltage will not restart charging.
  • When batteries are put in and no buttons is pressed a 0.5A charge will start.
  • Voltage is measured with current off and is within 0.01 volt.
  • Voltage display is updated once a minute.
  • When charger is powered on it always starts in charging mode with 0.5A selected.
  • While power is on it remembers last mode selection, but will always start at 0.5A.


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Customer Reviews

Overall Customer Rating:

4.8 40 Customer Reviews

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  • Works great

    From Marc Mar 11,2017

    Great charger don't know why it's called helmet front mount now


    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • хороший заряднник

    From Andrey Oct 21,2016

    Заряжает все типы аккумуляторов.Много разных режимов.


    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • Good charger

    From Efrad Sep 13,2016

    This is an older version of the opus charger I looked everywhere for review's and I saw that it is the same version as the new charger but has problems when charging 4 cells at once; so I haven't charged 4 cells at once. Good price on good charger if you don't need to charge 4 cells at a time.


    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • Opus BT - C3100

    From Сергей Jul 02,2016

    Классная зарядка для всех типов батареек. Одна из лучших на рынке.

    Нет в комплекте адаптера для авто

    Is this helpful? Yes 0 No 0

    Price 4

    Ease of Use 5

    Build Quality 4

    Usefulness 5

    Overall Rating 5

  • Intelligent charger

    From A.K. May 25,2016

    Good price, display with light (20 seconds), adjustable current

    Firmware my device with bugs

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 4

    Build Quality 4

    Usefulness 4

    Overall Rating 4

40 Customer Reviews >

Shipping & Payment


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% 20.8% 60.9% 5.13% 19.2
Spain, United Kingdom, Italy, Germany, France & Portugal 1.62% 41.09% 43.26% 5.71% 19.9
Netherlands, Greece, Poland 5.59% 44.44% 35.84% 13.00% 18.76
Russia 0% 11.20% 68.50% 15.80% 24.6
Japan, Korea 0% 21.30% 68.80% 9.66% 15.95
Brazil 0% 0.00% 17.96% 54.14% 38.6
Thailand, Singapore & Malaysia 0% 15.50% 45.75% 21.36% 19.03
Other countries 0.73% 40.41% 49.93% 8.92% 20.28
Priority Line United States 49.90% 46.30% 0.93% 0.06% 8.3
Spain, United Kingdom, Italy, Germany, France & Portugal 5.55% 74% 19% 0.38% 10.8
Russia 0% 0.75% 88.30% 9.05% 20.04
Australia 7.67% 86.60% 5.68% 0% 11
Korea 77.01% 21.40% 1% 0% 5.6
Japan 95.80% 2.09% 0% 0% 5.4
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8
Other countries 40.75% 49.96% 5.13% 0% 10
Expedited Shipping ALL countries(EMS) 39.85% 50.09% 8.96% 0% 9
ALL countries(DHL) 90.15% 9.84% 0% 0% 4.48
EU Warehouse: Typically 3-5 days to the UK, 3-7days 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.

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