Opus BT-C3100 Charger/Battery Tester
This product is eligible for discounts depending on how many you buy! See the table above for pricing at different quantities. You can purchase other products in the same category (batteries, chargers, or accessories) and it will add to the wholesale discount. Add some products to your cart to test! Please note that during special sales you may see no quantity pricing table above in which case the sale price is the price no matter the quantity.
This is the Opus BT-C3100 v2.2. This is identical to the BT-C3400 that some other vendors are selling. This is the most full featured charger we sell. It can do all kinds of stuff in addition to just charging batteries, including testing and cycling them.
This product is for advanced users only. We will not provide advice or technical support in using it to test your batteries.
Opus BT-C3100 Features:
- 4 independent channels. Most chargers have some channels connected together but not this one. You can have each channel doing a different thing, one could be analyzing while another is charging, they could all be charging at different rates, the sky is the limit.
- Internal resistance quick battery test mode checks internal resistance of batteries
- Discharge testing up to 1A checks that your batteries really have as many mAh as they say they do.
- Charging up to 2A per channel (up to 2 batteries) or 1A per channel (up to 4 batteries) allows very fast battery charging.
- Refresh mode allows you to cycle batteries automatically
- Charges Li-ion, NiMH, and NiCd
- NiMH/NiCd sizes: AAAA, AAA, AA, A, C, and SubC
- Li-Ion Sizes: 10440, 14500, 14650, RCR123A (17340), 17500, 17670, 18350, 18500, 18650, 19670 (protected 18650), 25500, 26500, 26650, 20700 (including IJoy)
- Can be set to 3.7V LiFeO4 charging or 4.35V high voltage li-ion charging by a switch on the PCB. Default li-ion charging mode is 4.2V CC/CV.
- Minus delta voltage charging for NiCd/NiMH reliable charging.
- New backlit LED display tells you information
In the Box:
- Opus BT-C3100 Charger/Battery Tester
- 1 US Power Adapter
- Manual
- Reviews
- Questions
- BATTERIES
- functions
- charger
- units
- Opus
- battery conditions
- rates
- YouTube
- trouble
- device
Opus BT-300
Set my Nicor aside to try this “bad boy” this is not just a charger but it also performs a plethora of other functions, quick test, full test and discharge. If you are a daily user of rechargeable batteries you should have the Opus. You have all heard horror stories of battery failures, this will give you the piece of mind that the batteries you are using are safe.
Good machine
I think the product is overall good. However, out of the box the second slot wouldn't work. I made sure it wasn't the battery that was the cause by swapping it out with others that were working in other slots. I figured it was cheaper to just keep it than spend the money to return it.
Excellent Service and Products
Super products and outstanding service. I appreciate the quick service and quality products. I will definitely order from your company again.
Big step up from simple chargers
I charge 18650s, AA, and C sizes; plan on doing AAA eventually. C barely fits and is easily dislodged by the action of adding/removing another battery. And it would be nice to handle D cells, but no. Still, I'm very pleased to have the discharge refresh option for my NIMH (big difference for some older cells), and capacity report for 18650s. It would be nice to have the capacity display stick around longer so I can make a note of it; I just have to record the mAh before I remove the cell.
Versatile Charger
I found out about this little beauty from watching YouTube videos, and since I had loads of 18650 LiON batteries and AA NiMH batteries, as well as Milwaukee M18 batteries that needed balancing, I figured I should pick up one of these chargers to test and charge all my different batteries. I like that I can set the charging current for each battery separately, and I appreciate the ability to discharge and automatically recharge batteries. Not sure how accurate the internal resistance test is, but at least it gives me some idea of the relative condition of my batteries. Overall, I think this is a very versatile and useful charger/tester for the casual hobbyist like me. It’s definitely the most capable charger I currently own and I highly recommend it.
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