--- product_id: 472961877 title: "Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V" brand: "daly" price: "β‚Ή 5056" currency: INR in_stock: true reviews_count: 8 category: "Daly" url: https://www.desertcart.in/products/472961877-daly-battery-equalizer-4s-1a-with-bluetooth-app-and-wire store_origin: IN region: India --- # 1A balancing current Bluetooth app monitoring 0.01V voltage equalization accuracy Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V **Brand:** daly **Price:** β‚Ή 5056 **Availability:** βœ… In Stock ## Summary > πŸ”‹ Stay balanced, stay ahead β€” power your battery’s peak performance! ## Quick Answers - **What is this?** Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V by daly - **How much does it cost?** β‚Ή 5056 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/472961877-daly-battery-equalizer-4s-1a-with-bluetooth-app-and-wire) ## Best For - daly enthusiasts ## Why This Product - Trusted daly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Energy-Efficient & Cool:** High-efficiency energy transfer with minimal heat generation for safer operation ❄️ - β€’ **Universal Compatibility:** Works flawlessly with Li-ion & LiFePO4 packs and any BMS brand πŸ”Œ - β€’ **Precision Active Balancing:** Extends battery life with ultra-accurate 0.01V voltage equalization ⚑ - β€’ **24/7 Intelligent Equalization:** Continuous balancing regardless of charge/discharge or sleep mode πŸ”„ - β€’ **Seamless Bluetooth Integration:** Monitor and control your battery health anytime via smart app πŸ“Ά ## Overview The Daly Battery Equalizer 4S 1A is a smart active balancer designed for lithium battery packs (3.7V, 3.2V, 2.2V) that ensures ultra-precise voltage equalization (0.01V accuracy) with a balancing current up to 1A. Featuring Bluetooth app connectivity, it offers real-time monitoring and control, compatible with any BMS brand. Its 24/7 intelligent balancing extends battery lifespan by maintaining cell consistency with high efficiency and low heat generation, making it an essential upgrade for professional-grade battery management. ## Description Buy Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V: Power Converters - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: These are awesome and you can't beat the price - I read a bunch of reviews and a few of them pointed out that the negative reviews were probably because of people not knowing how to use them or the app. I decided to give them a try and ordered eleven of these, one for each of my chevy volt 48v 12s battery packs. I downloaded the app from the Google Play store and was not shocked to find that people were correct, there is little description and it is in Chinglish which is not very helpful but with a little effort on my part, I could figure out what they were attempting to say. I watched a couple of videos on youtube but those were more on the BMS and not my 12s active balancer but they did help me to feel more confident that I was setting these up correctly. From there it went smoothly. The app has you guessing but it's really quite simple. I have eleven batteries that are going to be set up in parallel for a 48v 500aH system. Step one, click on local as these active balancers use bluetooth. Step two (for me) select parallel battery configuration. Step three, click on the plus next to each of my batteries to add them to my system. Step four, go back to the previous page which now lists my batteries by their bluetooth address. Step five (repeated for each battery) click on the ID and that takes you to the setup pages where you change the parameters, when you attempt to set the first one it will ask for your password, enter 123456 and it won't ask again unless you leave this battery's set up and return to it later. Simple. Now that I have them set up, they are doing a wonderful job at keeping my batteries' cells well balanced. This is exactly what I needed and they work flawlessly. The 13 pin cable is plenty long for me to make a cable to connect to my battery's built in connector and since I had the pinout for the chevy volt battery it was a very simple process. I could not have asked for a better product at a better price. I will review again in a few months to update on how these are holding up but I do expect good things to report. Review: Must have item for your Daly BMS - I purchased a Daly BMS from desertcart years ago. My system is 16S/48v LifePO4 (300ah). I have had several batteries go bad over the years because they are improperly balanced. While Daly has "Balancing" on their BMS it's not active balancing. Even with daily charging and discharging the built-in function on the BMS is insufficient to maintain battery health. This has cost me over $1000 in battery failures. After installing the Smart equalizer the system is now balancing nicely even with the larger batteries. I initially had a few issues which was largely due to the lack of documentation. Fortunately, there are some end-user videos on YouTube. My balancer appeared to be DEAD. There are other 1-star reviews claiming the same. Probably those units were just fine. The system has one LED that only comes on when actively balancing. The default for active balancing startup is at 3.0v. This means ALL of your batteries must be 3v or higher to start balancing. I had one battery that was just under 3v. This setting can be changed in the Daly app. The second issue I had was I didn't see the Bluetooth dongle in the app. I swapped the Bluetooth from my regular Daly BMS and it worked. This allowed me to update the starting voltage. It turns out you have to add the Bluetooth dongle to the app to see it. A poor UI design in my opinion. To Fix this open the "SMART BMS" app then click on "local monitoring". Next change your battery selection to a different selection than what is currently selected, even if you are on the correct setting. This will display a link "Search". Click on search and add your device(s) to the app. Now change the battery type back to the correct one if needed. Also, you can confirm the Bluetooth is broadcasting by going to your phone connections and checking under Bluetooth / available devices. You won't be able to connect to it in this method but at least you can see its broadcasting. The Bluetooth dongle has a label with the Bluetooth broadcast ID printed on it. Hopefully, this helps out anyone else experiencing the same issues. So far I am very happy to have active balancing enabled. Batteries were within .05v difference within a day. You can select balancing all the way down to .02v in the app but .05v is the default setting. ## Features - [Active Equalizer]Can be used alone or compatible with any brand of BMS.Suitable for Li-ion/LifePO4 battery packs - [Working Principle] Balanced by energy transfer, with high efficiency, less energy loss and low heat generation. Ensure battery consistency and extend the battery life. Balanced current: 0.1-1A, Voltage equalisation accuracy: 0.01VοΌ› - [24-hour equalization] Not limited by battery charging, discharging or static, sleep mode, etc. Intelligent detection of battery voltage, automatically turn on/off balancing. - [Smart active balancer]Support UART/RS485 communication, Bluetooth APP can view battery balancing information at any time. Indicator light on/flashing: balanced state; indicator light off: non-balanced state/fault. - [Satisfactory Service]: We Provide 24-hour online service,If you encounter any problems, Please feel free to contact me, we will give you a perfect solution. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B5LJY981 | | Best Sellers Rank | #131,315 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #506 in Power Converters | | Brand | DALY | | Color | Smart Active Balancer | | Customer Reviews | 4.0 out of 5 stars 92 Reviews | | Input Voltage | 3.7 Volts | | Item Dimensions | 2.36 x 1.38 x 0.7 inches | | Item dimensions L x W x H | 2.36 x 1.38 x 0.7 inches | | Manufacturer | Dongguan Daly Electronics Co., Ltd | | Mfr Part Number | AB-1 | | Model Number | 4S 1A B0B5LJY981 | | Output Voltage | 3.7 Volts | | Plug Format | Type A | | Plug Type | Type A | | UPC | 768655913440 | | Unit Count | 1 Count | ## Product Details - **Brand:** DALY - **Color:** Smart Active Balancer - **Input Voltage:** 3.7 Volts - **Item dimensions L x W x H:** 2.36 x 1.38 x 0.7 inches - **Output Voltage:** 3.7 Volts ## Images ![Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - Image 1](https://m.media-amazon.com/images/I/61I9abwkQUL.jpg) ![Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - Image 2](https://m.media-amazon.com/images/I/71NyW7s-5IL.jpg) ![Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - Image 3](https://m.media-amazon.com/images/I/71ImZg6vDhL.jpg) ![Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - Image 4](https://m.media-amazon.com/images/I/61n-4O9sAmL.jpg) ![Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - Image 5](https://m.media-amazon.com/images/I/61qLIV1QK0L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Why do you need this and a bms? the bms is supposed to balance as well?** A: Most BMS will only balance while the batteries are charging. The active balancer works all the time. It takes current from a battery with high voltage and sends it to a battery with lower voltage. **Q: can the 20s also be used for a 14s and 16s battery and Lifepo4 and LI** A: I cannot say for sure-- but I wouldn't think so. The unit comes with the number of leads to match the cells and I don't believe it would function correctly without the same number of battery cells connected. **Q: Will this balancer work without a BMS?** A: Yes it will. You can actively monitor the state of your battery via blue tooth app and it works quite efficiently. Good for older out of balance battery packs. **Q: Why does daly balancer show diferent voltage on the app from my original bms? Some times in 30 mV diference** A: Probably the accuracy of the voltage reading. These are not "industrial grade" instruments. they are consumer level. A 30mV difference is not too big and nothing to be concerned over. ## Customer Reviews ### ⭐⭐⭐⭐⭐ These are awesome and you can't beat the price *by A***N on August 17, 2024* I read a bunch of reviews and a few of them pointed out that the negative reviews were probably because of people not knowing how to use them or the app. I decided to give them a try and ordered eleven of these, one for each of my chevy volt 48v 12s battery packs. I downloaded the app from the Google Play store and was not shocked to find that people were correct, there is little description and it is in Chinglish which is not very helpful but with a little effort on my part, I could figure out what they were attempting to say. I watched a couple of videos on youtube but those were more on the BMS and not my 12s active balancer but they did help me to feel more confident that I was setting these up correctly. From there it went smoothly. The app has you guessing but it's really quite simple. I have eleven batteries that are going to be set up in parallel for a 48v 500aH system. Step one, click on local as these active balancers use bluetooth. Step two (for me) select parallel battery configuration. Step three, click on the plus next to each of my batteries to add them to my system. Step four, go back to the previous page which now lists my batteries by their bluetooth address. Step five (repeated for each battery) click on the ID and that takes you to the setup pages where you change the parameters, when you attempt to set the first one it will ask for your password, enter 123456 and it won't ask again unless you leave this battery's set up and return to it later. Simple. Now that I have them set up, they are doing a wonderful job at keeping my batteries' cells well balanced. This is exactly what I needed and they work flawlessly. The 13 pin cable is plenty long for me to make a cable to connect to my battery's built in connector and since I had the pinout for the chevy volt battery it was a very simple process. I could not have asked for a better product at a better price. I will review again in a few months to update on how these are holding up but I do expect good things to report. ### ⭐⭐⭐⭐⭐ Must have item for your Daly BMS *by P***A on January 10, 2024* I purchased a Daly BMS from Amazon years ago. My system is 16S/48v LifePO4 (300ah). I have had several batteries go bad over the years because they are improperly balanced. While Daly has "Balancing" on their BMS it's not active balancing. Even with daily charging and discharging the built-in function on the BMS is insufficient to maintain battery health. This has cost me over $1000 in battery failures. After installing the Smart equalizer the system is now balancing nicely even with the larger batteries. I initially had a few issues which was largely due to the lack of documentation. Fortunately, there are some end-user videos on YouTube. My balancer appeared to be DEAD. There are other 1-star reviews claiming the same. Probably those units were just fine. The system has one LED that only comes on when actively balancing. The default for active balancing startup is at 3.0v. This means ALL of your batteries must be 3v or higher to start balancing. I had one battery that was just under 3v. This setting can be changed in the Daly app. The second issue I had was I didn't see the Bluetooth dongle in the app. I swapped the Bluetooth from my regular Daly BMS and it worked. This allowed me to update the starting voltage. It turns out you have to add the Bluetooth dongle to the app to see it. A poor UI design in my opinion. To Fix this open the "SMART BMS" app then click on "local monitoring". Next change your battery selection to a different selection than what is currently selected, even if you are on the correct setting. This will display a link "Search". Click on search and add your device(s) to the app. Now change the battery type back to the correct one if needed. Also, you can confirm the Bluetooth is broadcasting by going to your phone connections and checking under Bluetooth / available devices. You won't be able to connect to it in this method but at least you can see its broadcasting. The Bluetooth dongle has a label with the Bluetooth broadcast ID printed on it. Hopefully, this helps out anyone else experiencing the same issues. So far I am very happy to have active balancing enabled. Batteries were within .05v difference within a day. You can select balancing all the way down to .02v in the app but .05v is the default setting. ### ⭐ Needed for their BMS to work properly but beware they may sell you a dud *by C***G on September 13, 2024* Daly BMSs require their active balancers to fully charge a pack. You can see my 1-star review under Daly BMSs, However, despite having a Bluetooth connection with their "Smart BMS" app, it is not integrated with the BMS. To this day, the active balancer fails to accurately reflect its current status in the app - whether it is turned on or off, balancing or not balancing, its limits reached or not, no such indication. When I asked Daly through Amazon Messages, they claimed that if I was using a Dalg K-series BMS, I would need a different model being sold on Amazon, one with 2 UART ports, not 1 as the one sold on Amazon. Since you could not return the one you just bought because Daly Electric does not honor the 30-day Refund or Replacement warranty published on Amazon - you'd have to buy a new one from them! None of this was disclosed on the BMS page or on the active balancer page. If you got suckered, that's your problem. Daly will not send you a prepaid return label or work with you until all Daly items work together. CAVEAT EMPTOR - I have now wasted months and over $1K going down the Daly BMS / balancer rabbit hole only to be left with incomplete packs that have to be gingerly recycled if even possible. ## Frequently Bought Together - Daly Battery Equalizer 4S 1A with Bluetooth App and Wire Leads and Compatible Active Balancer for Lithium Battery Rated 3.7V 3.2V 2.2V - DALY Smart BMS 4S 12V 100A with WiFi Module and CAN 485 Communication Protection Board for Remote Monitoring of LifePO4 Lithium Battery Pack --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/472961877-daly-battery-equalizer-4s-1a-with-bluetooth-app-and-wire](https://www.desertcart.in/products/472961877-daly-battery-equalizer-4s-1a-with-bluetooth-app-and-wire) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-04-23*