BT - C3100 V2.2 Universal Battery Charger Speedy LCD Display Smart Battery Charger for Rechargeable Batteries Ni-MH Ni-Cd AA AAA,3.7V Li-ion 18650 26650 17670 14500 18490 (4-Slot)
Brand | OPUS |
Color | purple |
Product Dimensions | 1.54"D x 3.86"W x 5.67"H |
Item Weight | 0.52 Pounds |
Output Voltage | 12 Volts |
About this item
- Plug: US adapter,Charging Cell Type: Ni-MH, NiCd, Lithium Ion,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
- Note: Battery not included,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
- Four Working Mode Available at User's Choice: Charge, Discharge, Test, Quick Test and Refresh,The charger also includes overheat detection to protect rechargeable batteries and charger itself from overheating
- 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.
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This Item Opus BT - C3100 V2.2 Universal Battery Charger Speedy LCD Display Smart Battery Charger for Rechargeable Batteries Ni-MH Ni-Cd AA AAA,3.7V Li-ion 18650 26650 17670 14500 18490 (4-Slot) | Recommendations | dummy | dummy | dummy | dummy | |
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Price | Currently unavailable. | $29.47$29.47 | -5% $39.43$39.43 Typical: $41.50 | $59.93$59.93 | $45.99$45.99 | $59.39$59.39 |
Delivery | — | — | Get it as soon as Sunday, Mar 24 | Get it Mar 22 - 27 | Get it as soon as Sunday, Mar 24 | Get it Mar 22 - 27 |
Customer Ratings | ||||||
Accuracy | 4.5 | 3.5 | — | 5.0 | 3.0 | 4.7 |
Value for money | 4.2 | 4.0 | 4.3 | — | 3.3 | 4.5 |
Easy to use | 4.6 | — | — | 4.5 | — | 4.7 |
Easy to read | — | 4.6 | — | 4.7 | — | 4.7 |
Sold By | — | AllmaybeDirect | Amazon.com | DC Workshop | AllmaybeDirect | DC Workshop |
input voltage | 240 volts | 3.6 volts | 5 volts | 240 volts | 1.2 volts | 240 volts |
weight | 0.52 pounds | 0.33 kilograms | 225 grams | — | 1.41 pounds | 0.65 kilograms |
Product information
Product Dimensions | 5.67 x 1.54 x 3.86 inches |
---|---|
Item Weight | 8.3 ounces |
ASIN | B01852TBOU |
Item model number | US126488801M |
Customer Reviews |
4.5 out of 5 stars |
Is Discontinued By Manufacturer | No |
Date First Available | November 18, 2015 |
Manufacturer | GBlife |
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Product Description
Main Features:
The charger integrates the minus delta voltage 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 )
Easy to read LCD with back light Showing Battery Voltage, Charge / Discharge Current, Charging Time, Battery Capacity etc.
Operating temperature: 0 - 40 deg.C
Max charging capacity: Up to 20000mAh
Power adapter: DC 12V, 3.0A ( Output ), 100 - 240V, 50 / 60Hz ( Input )
Highlight:
1. Voltage update rate is 30s instead of 60s.
2. 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
3.35V charging algorithm is changed to 4.27V.
4. New fan cover make better protection for cooling fan.
5. Charging current range ( mA ): 200, 300, 500, 700, 1000, 1500, 2000
6. Discharge current range ( mA ):200, 300, 500, 700, 1000 ( li-ion cell battery only )
7. Max. charging capacity: 20000mAh
8. Voltage deviation: max 0.03V 4.2V
9. Current deviation: max 5%
Type: Charger
Brand: Opus
Model: BT-C3100 V2.2
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: 0.558 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 Opus BT - C3100 Battery Charger
1 x US Power Adapter
1 x English User Manual
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the charging and discharging features of the battery charger. They say it has multiple functions for charging and discharging, and that it works great as expected. Customers are also impressed with the speed, saying it works very well for 18650 battery types. They also appreciate the accuracy, saying the charger accurately measures battery output. Customers also like the ease of use. However, some customers dislike noise. Customers have mixed opinions about the quality, heat, and charge of the charger.
AI-generated from the text of customer reviews
Customers like the charging capabilities of the battery charger. They mention that it has multiple functions for charging and discharging, and it charges or discharges each bay individually. Customers find the multiple functions useful for reconditioning older cells. The charger is easy to use and can charge or discharge to test capacity. Customers also appreciate the ability to set the charge and discharge rate, but the default works just fine. Overall, customers are satisfied with the charging capability of the charger.
"...based on several YouTube videos and the charger's ability to test and charge cells individually...." Read more
"...Third, the charge is accurate with a wide range of options and voltages to choose from...." Read more
"...This worked on mine as well.Again... Great charger." Read more
"This charger is extremely useful for determining battery health. It can charge, discharge test, recondition, and test resistance and it can take NiMH..." Read more
Customers are satisfied with the speed of the battery charger. They mention that it works great as expected, it doesn't run hardly at all, and works very well for 18650 battery types. The results are amazingly consistent, and there are no issues with the charger.
"...Overall this product works as advertised, and performs perfectly on both large and small jobs.Recommendation:Damn Good Buy!" Read more
"...The results are amazingly consistant. The voltage of Fully Charged batteries has been exactly the same for all batteries...." Read more
"...it only comes on as required for thermal regulation and it doesn't run hardly at all unless you are in the discharge portion of a test...." Read more
"...It does a great job of this and will tell you individual cell impedance in milliohms and total capacity in milliamp hours..." Read more
Customers like the accuracy of the battery charger. They say it's great for testing lots of 18650 batteries, and it accurately measures the batteries output. Customers also appreciate the ability to test capacity in mAh and the refresh feature. They also appreciate that it' s easy to use and can independently test capacity of 4 cells at the same time. Overall, customers are happy with the accuracy and functionality of the product.
"...purchase, and dozens of charge cycles, all of my batteries still test perfectly with no degradation of capacity...." Read more
"...It will also allow you to see the final voltage of the battery and also how many mAmp hrs. were actually loaded into the battery...." Read more
"...usually in the center 2 "bays" and reporting odd values (like charge-time starting at 44:00 instead of 00:00)...." Read more
"...Third, the charge is accurate with a wide range of options and voltages to choose from...." Read more
Customers find the battery charger easy to use. They mention that the menu is easy to navigate, and the batteries remove and install easily. The product is great quality and works great for getting batteries. Some customers find the written instructions confusing on usage, but the UI is excellent and the charge/test functionality is extremely useful with purchasing cheaper Li-ion batteries.
"...charges for different bays can be a little wonky, but it's easy to figure out and get used to...." Read more
"...PROS* It comes with an A4 instructions sheet.* Very easy to use* Independently test capacity of 4 cells at the same time..." Read more
"...The user interface is a little bit clumsy to figure out at first, but once you become accustomed to it, it's not too bad...." Read more
"...studied the manual and understood how it works I found it simple to use on a daily basis (don't skip reading the manual!)...." Read more
Customers are mixed about the quality of the battery charger. Some mention it has many useful features, the build quality seems fantastic, and is reliable. Others say it's very cheaply built, has a faulty fan, or has bad bearings.
"...But this unit isn't dumb...." Read more
"Everything arrived correctly, just as published by the seller. I recommend it" Read more
"...It's very cheaply built and has the feel and look that it is an afterthought for the USA market..." Read more
"...All the various functions work as advertised. It seems to be reasonably well made...." Read more
Customers have mixed opinions about the heat of the battery charger. Some mention that it has a fan to keep it cool, while others say that it overheats and shuts down to a 0ma rate. The control monitor and a cooling fan built into the system do a very nice job, but some customers say that the internal fan is not adequate enough for 1C discharging and that the whining sound of a failed cooling fan.
"...reeked of the smell of a circuit board that had some severe thermal damage. It smelled like something on the PC board had been burned...." Read more
"...protection: It has a temperature control monitor and a cooling fan built into the system and it does a very nice job...." Read more
"...Most other chargers don’t need one and there’s no option for passive heat dissipation...." Read more
"...let the batteries rest before use, but I still like that they aren't hot after charging...." Read more
Customers are mixed about the charge of the battery charger. Some mention that it's easy to use, has high charge and discharge rates, and can drain your batteries fully. It's awesome and never overcharges, and it will test your battery capacity and may refresh batteries that have been abused. However, others say that their batteries seemed not to last as long after being charged with this unit, and that it reduces overall life span.
"This charger is extremely useful for determining battery health...." Read more
"...Its not a CV (constant voltage) charger. It does a slight overvolt to get the amperage moving...." Read more
"...This is a useful function for erasing battery memory and re-optimizing the amount of charge that can be put into the cell, especially in older..." Read more
"...The fact that it will actually bring some dead batteries back to life, instead of just getting rid of them to a recycling station is a great feature..." Read more
Customers are not satisfied with the noise produced by the battery charger. They mention that the fan is very noisey, can be heard in the background on conference calls, and makes a beeping screeching sound. Some customers also report that the charging process makes grating sounds.
"...The fans will try to spin up and make a hell of a noise because they are out of balance or something...." Read more
"...The fan can be loud, or just high pitched, so I wouldn't want this thing in my bedroom...on in the master bath, but anywhere else is fine as it's..." Read more
"...has a cooling fan that runs during the discharge cycle that puts out a bit of noise---not a lot, but enough to be pesky if you're trying to watch a..." Read more
"...Not too long after receiving the fan started to make an awful grinding/grating sound, it was loud enough to be heard across my house...." Read more
Reviews with images
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Top reviews
Top reviews from the United States
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The unit came with the base station, and power supply and Manual.
Pros:
I found these to be very well design elements of this unit both before, during and after using it:
Modes: There are 5 different modes that can be selected for the unit to perform. Charging, Discharging, Refresh, Test, and Quick Test. Having this many options for your batteries is quite nice!
Overheating protection: It has a temperature control monitor and a cooling fan built into the system and it does a very nice job. But that doesn't mean you shouldn't monitor the batteries. When you get a "heater" on you hands, the unit will keep dumping more and more power into that bad battery and struggle to keep the unit cool. I have a laser temperature unit to keep track of the batteries.
Display: I found this very useful. you can cycle through all the settings the unit is currently set for without disrupting the process, including the current status of the process that it is doing.
Current: This is my favorite part of the unit. You can charge or discharge 4 cells at the same time at 1000mAh or 1 amp for Lithium Ion cells. you are also given charging options of 200, 300, 500, 700, 1000, 1500 and 2000mAh. However for the upper charging mAh options you have to use certain slots and only 2 can be done at the same time.
Voltage meter: Now I only use the voltage from my multimeter as the actual voltage of a cell. But this unit isn't dumb. If it reads that the voltage of a cell is low, it will not simple start dumping the selected mAh current you selected into the cell. It automatically drops the current down to a very small "trickle" charge until the voltage comes up enough to start putting in the selected current. I like this feature!
Backlit Display: You have the option of having the backlit display on all the time or having it turn itself off after a preprogrammed amount of time.
Multiple Cell options: Way too many to list here, but trust me this baby can handle all kinds of batteries.
Cons:
Resetting: I've not figured out what the conditions are that cause this unit to reset during the charging process. It's not over heating, or power drops or the power supply, but for some reason the unit will auto reset to the default charge settings which are 500mAh. the only thing I have figured out that overrides this is to select all the bays and cycles through the modes back to charge and setting the current back to 1000mAh. Very frustrating indeed considering how much I like this unit.
Fans: While I did list this as a big Pro, it is also a Con in the fact that there is a balancing problem with how these units are manufactured. The fans will try to spin up and make a hell of a noise because they are out of balance or something. This happens multiple times until finally they start to spin up without issue. I've learned to live with it, but it is something to consider if you are planning on buying this unit.
Wish List:
More powerful power supply unit. The PSU that comes with the device does a good job, but it is only rated at 12DC and input of 100-240V at 50/60Hz and the output is 12v DC at 3.0A, which seems odd that it can charge at 4A. So IMO a more powerful PSU is needed.
Personal experience:
I'm building a DIY powerwall for my house, and I have 1000's of 18650 cells to process. I have 5 of these units working around the clock and other than the Con I listed regarding resetting (which only happens on the oldest unit) these babies do a great job!
Bottom Line:
Overall this product works as advertised, and performs perfectly on both large and small jobs.
Recommendation:
Damn Good Buy!
Top reviews from other countries
Reviewed in Mexico on April 5, 2022