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Description
OPUS BT-C3100 Smart Smart Digital Intelligent 4-Slot Battery Charger, EU Plug, US Plug, UK Plug1. Four independent charging channels: With independent charging control chip, precise control of the charging situation of each charging slot, the working power of the charger is 12V 3A, and a dedicated DC switching power supply is used 2. There are four levels of charging current available for selection, 200 300 500 700 1000mA, among which, if there is only 1, 4 channels with batteries, the current levels are: 200 300 500 700 1000 1500 2000mA, the
1. Four independent charging channels: With independent charging control chip, precise control of the charging situation of each charging slot, the working power of the charger is 12V-3A, and a dedicated DC switching power supply is used
2. There are four levels of charging current available for selection, 200/300/500/700/1000mA, among which, if there is only 1, 4 channels with batteries, the current levels are: 200/300/500/700/1000 / 1500/2000mA, the discharge battery can be set to 200/300/500/700/1000mA
3. The discharging mode does not switch to charging, and the battery discharge capacity is displayed. In charging mode, the 4.21V charger is judged to be fully charged
4. LCD screen: Can display the real-time charge/discharge capacity, voltage, current, and time of the 4 channels of batteries
5. Four working modes: Charge, discharge, repair and capacity test and battery internal resistance test
6. Applicable battery type: Lithium battery, model: 10440, 14500, 16340, 18500, 18650, 26650, 26500; Ni-MH battery, model: AA, AAA, C, D
7. Working temperature: 0 to 40 degrees celsius
8. Note: The product does not contain batteries
Function button:
1. MODE operating mode selection button
2. DISPLAY display mode button
3. CURRENT current adjustment button
4. SLOT, can individually adjust the working mode of each channel
The specific operation method of the charger:
1. Long press MODE for 2 seconds to enter the working mode to select, and then press this key to have four working modes to choose from, namely charge, discharge, repair capacity test and battery internal resistance test
2. Press DISPLAY to display the charge current, battery voltage, battery power, and battery charge and discharge time respectively.
3. When power on, the charger defaults to the charging mode and the charging current is 500mA
4. When powering on, press CURRENT to adjust the current. When entering work, if you want to adjust the current again, you need to switch the working mode to press this key to be effective. The charge and discharge current can be adjusted.
5. Press SLOT to adjust the working mode of each channel individually
6. When the temperature of the battery exceeds 40 degrees when the battery is charged or the temperature of the PCB board exceeds 40 degrees, the fan will start to rotate.
7. Select the capacity test working mode, the current can be the same as charging
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
My pit bull loves them.
Color: Purple
I picked up the Frienhund Tough Dog Toys 3-pack for my large, heavy chewer, and overall I’m pretty impressed. Right out of the box, the toys feel solid and well-made—definitely more durable than your average chew toy. My dog usually destroys new toys within a day or two, but these have held up significantly longer, which is a big win.
They also do a great job of keeping him occupied. The shapes and textures seem to keep his interest, and I’ve noticed less destructive chewing on furniture since introducing these. That alone makes them worth it.
The only reason I’m giving 4 instead of 5 stars is that while they’re very tough, they’re not completely “indestructible” (despite the claim). After a couple of weeks of heavy use, there are some visible wear marks. Still, compared to most other toys we’ve tried, these last much longer.
Overall, a great option for medium to large dogs that are aggressive chewers—durable, engaging, and a solid value for a 3-pack.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Great Toys for Chewers
Color: Purple
Love these dog toys, they are so well-made and keep my Golden Retriever busy for hours. The variety of sizes is nice too, they aren’t heavy at all, but they sure hold their shapes , even with the constant chewing. The price was very reasonable, too.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Grateful for chewers!
Color: Purple
Very tough very durable. I have two dogs and they are still not into pieces so really good quality good value for your money.
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Reviewed in the United States on June 10, 2026
★★★★★ 4
Great product
Color: Purple, Color: Purple
My dogs loved these toys. Durable and apparently very coveted as my puppers “argued” over who got each one. Kept them playing and chewing for hours. Giving only 4 stars instead because I Wish the size was bigger because I have found that sometimes I don’t see it and stepping on it is Absolutely NO FUN.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Rottweiler approved
Color: Purple
My Rottweiler puppies love these bones. I feel good about letting them play with these and not worry they will break or that they can choke because they are durable and a good size and weight. I like the variety and can put peanut butter on the crevices if I want to give as a treat. Worth the money!
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Reviewed in the United States on June 7, 2026
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