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DC Workshop
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BT-C3400 V31 Opus Battery Charger Analyzer Li-ion 18650 26650 3100 NiMH AA AAA C

US $52.73
ApproximatelyAU $82.31
Condition:
Brand New
More information - About this item condition
3,583 sold
Breathe easy. Free delivery and returns.
People want this. 943 people are watching this.
Postage:
Free USPS Ground Advantage®.
Located in: Sacramento, California, United States
Delivery:
Estimated between Thu, 22 May and Tue, 27 May to 43230
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the postage service selected, the seller's postage history, and other factors. Delivery times may vary, especially during peak periods.
Returns:
30-day returns. Seller pays for return postage.
Payments:
     Diners Club

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eBay item number:331325504524
Last updated on 16 May, 2025 03:23:06 AESTView all revisionsView all revisions

Item specifics

Condition
Brand New
Brand
OPUS
Compatible Battery Sizes
18500, 17500, 26650, 14650, 17670, 18650, 10440, 14500, 19670, 25500, 18350, Rcr123a
Type
Car Charger
Battery Capacity
4
Voltage
3.6 V
MPN
BTC3400
Chemical Composition
Li-Ion
UPC
0727908590739

Item description from the seller

About this seller

DC Workshop

100% positive Feedback•111K items sold

Joined Sep 1998
Usually responds within 24 hours
Battery Chargers and Rechargeable Batteries. Battery test and analyzing chargers.
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Detailed seller ratings

Average for the last 12 months
Accurate description
5.0
Reasonable postage costs
5.0
Postage speed
5.0
Communication
5.0

Popular categories from this Store

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Battery Chargers TestersOther

Seller feedback (40,349)

All ratings
Positive
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Negative
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Timely arrival and product works as expected. It condition was in original package and unopened. This was the best value I found for this product. Product was not damaged and perfect in appearance. I would recommend this product. It is an excellent charger and seller.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    The battery charger is well made and with an excellent set of features. The sellers price and delivery performance were first rate.
  • *****- Feedback left by buyer.
    Past year
    Verified purchase
    Takes a little while to learn all of the operating modes but beside charging lithium and nickel chemistry batteries, the BT-3400 also does a good job of refreshing (important for nickel chemistry batteries that have been sitting for a while) as well as determining the remaining amp-hour capacity of whatever batteries it can accept. It’s quite consistent in what capacities it reported for a few random batteries I had it test.
See all feedback

Product ratings and reviews

Learn more
4.9
172 product ratings
  • 161 users rated this 5 out of 5 stars
  • 11 users rated this 4 out of 5 stars
  • 0 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 138 reviews
  • by jewellmd99
    08 Jun, 2018Top favourable review

    Not your ordinary battery charger

    I purchased the OPUS BT-C3400 battery charger to test a large pile of 18650 batteries. I already had an Intelligent charger for these batteries, however the OPUS is different. Not only does it charge, but it will test and do a complete discharge & recharge batteries. Each slot is independently controlled. I am a person who farms 18650 batteries from old laptop batteries. I will then test & charge these batteries, separate them in piles and use the better ones in my TOMO 4-slot battery bank. The battery bank is then used to charge USB devices (i.e. phones, wireless headset, etc) while camping. With the OPUS I can identify high capacity batteries over ones that need to be recycled. I couldn't be happier with this charger. A little pricey, but it is well built and has the features I ...

    Verified purchase: YesCondition: NewSold by: rdana

  • by grantdcol
    06 Nov, 2019

    Excellent user interface, well made. I prefer it over the LiitoKala Lii-500.

    Great charger. I bought 1 of them, tried it out, then bought 3 more. I like it better than the LiitoKala Lii-500. It is built slightly better but more important to me is the user interface. It shows battery monitoring information for all 4 batteries simultaneously - charging current, voltage, cumulative mAh in during charge, cumulative mAh out during discharge, and time elapsed. The cell capacity testing feature is nice - you pop in a cell and it charges it all the way up, then discharges to a safe low voltage, and then back up. It records and displays the mAh discharged at the end of the process. Setup is super easy, you do it once, and you can pop in new cells over and over again without having to hit any buttons at all. This model discharges Li-Ion 18650 cells to 3.1v. I believe the ...

    Verified purchase: YesCondition: NewSold by: rdana

  • by jb52486
    02 Sep, 2018

    Good versatile chager for the price

    Charges batteries individually so you're assured a full charge on each battery. You can choose the charging rate for a slow or fast charge. The analyzer function can take a while,(like all day). But it will give you the current battery capacity in mah. This helped me identify which batteries were weak and so I could take them out of service. The charger is of good quality and even has its own little cooling fan. It has been working very well for me so far. Seems to be a good value for the money especially if your looking for a charger that does more than just charge batteries.

    Verified purchase: YesCondition: NewSold by: rdana

  • by legaleagle12
    08 Aug, 2019

    I haven't found a better charger.

    I haven't found a better charger at any price. It just rocks. It has all the user selectable features you could need, four independent channels each separately selectable for 'charge', discharge, internal resistance test, plus its main attraction over the competitors: refresh and multi- refresh which tell you the actual storage capacity vs the 'mAh rated' claims. Auto detection of battery chemistry and charge settings. User selectable charge or discharge current rate from 200 to 2000mA. Real time voltage and current display while charging or discharging. All the protective circuitry for both the battery and the charger currently available. There is nothing more to want other than a model with more than four battery channels.

    Verified purchase: YesCondition: NewSold by: rdana

  • by egeekmctroyd
    24 Feb, 2019

    Amazing machine.

    This isn’t your average discount store charger. This particular model has selectable charging, test and refresh modes, where one can also select the current in milliamp-hours (mAh). These can be selected on a per-slot basis, or across all four slots. Discharge runs to 0.9v on NiMH-type cells, and 3.0v on LiIon-type cells. Charge runs to 1.5v on NiMH-type cells, and 4.2v on LiIon-type cells. The charger will auto detect the cell type when the battery is inserted into the spring clip. Those clips handily accommodate a range of sizes. I’ve been using the NiMH-range “Discharge Refresh” (DR) mode for a couple solid days now, attempting to restore a 4-pack of (potentially-sacrificial) AAA cells. These were Panasonic-branded, with a 750 mAh advertised rating. Initial DR cycle yielded an actual ...

    Verified purchase: YesCondition: NewSold by: rdana

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