--- product_id: 472961877 title: "DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion" brand: "daly" price: "€ 59.23" currency: EUR in_stock: true reviews_count: 8 category: "Daly" url: https://www.desertcart.at/products/472961877-daly-smart-active-balancer-4s-1a-with-bluetooth-for-lifepo4 store_origin: AT region: Austria --- # 1A balancing current Bluetooth real-time monitoring 0.01V voltage equalization accuracy DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion **Brand:** daly **Price:** € 59.23 **Availability:** ✅ In Stock ## Summary > 🔋 Stay balanced, stay ahead — power your off-grid lifestyle with smart precision! ## Quick Answers - **What is this?** DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion by daly - **How much does it cost?** € 59.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/472961877-daly-smart-active-balancer-4s-1a-with-bluetooth-for-lifepo4) ## 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 - • **Energy-Efficient Design:** High-efficiency energy transfer minimizes heat and maximizes battery lifespan. - • **Precision Power Balance:** Achieve ultra-accurate 0.01V voltage equalization for peak battery health. - • **Seamless Bluetooth Sync:** Monitor your battery pack anytime, anywhere with smart app connectivity. - • **Universal Compatibility:** Works flawlessly with any BMS and supports Li-ion & LiFePO4 batteries. - • **24/7 Intelligent Balancing:** Continuous, automatic balancing regardless of charge or discharge state. ## Overview The DALY Smart Active Balancer 4S 1A is a cutting-edge battery equalizer designed for Li-ion and LiFePO4 packs. Featuring 1 amp bidirectional balancing current and ultra-precise 0.01V voltage equalization, it ensures optimal battery consistency and longevity. With 24/7 intelligent balancing and Bluetooth app monitoring, users gain real-time insights and control. Compatible with any BMS, this compact device delivers efficient energy transfer with minimal heat, making it an essential upgrade for DIY off-grid and professional battery management setups. ## Description Buy DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion | Battery Equalizer. Cell Balancing. Bluetooth App Monitoring. Bidirectional Energy Transfer. DC-DC Energy Transfer Technology.: Power Converters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: a DIY dream come true - I live 5 months a year off grid, using a 60ah homemade battery to run fridge and some led lights. No BMS. The most I've used for 15 hours of nighttime is 200wh. For 3 years, I've charged the battery to 13.8v. I had a capacitor balancer, but never knew if it was working. Bought this active balancer, set the charge volts to 14.4v and watched in amazement, on my phone, the individual battery voltages rise, and the balancer doing its job. At 1 amp, balance happens pretty fast. Aside from a Victron SCC, this is my best solar purchase. The app is a little weird, since it's meant for a Daly BMS, but you can set the important parameters, like start voltage of balance and Delta of balance. Not so sure- tried it today and the balance just got worse, even when the battery was in absorption getting only 3 amps of input. Ended up with a delta of 0.150, charging to 14 volts. Tried it again a few days later: Set charge to 14 volt amps to 2 amps. All cells balanced out fine. Raised voltage to 14.4 , all cells balanced fine. My batteries are probably the problem- got one that's always lower. FWIW- the battery gained 10wh going from 14v to 14.4v. I don't see the point of pushing the battery to gain so little. I'll be charging at 13.8 or maybe 13.9v. Very happy with this balancer, even if it just showed me the cells voltage it would be worth the cost. Review: Works! - Ordered on the 19th, received on the 28th. Model # I received is HJ20 (4S). I am using this on my DIY LFP pack that previously had a cell voltage delta of .12V when charging - and getting worse (yes was top balanced first). First test and my delta was max of .027V! I am pleasantly surprised how accurate the voltage readings are, although not perfect. The parameters were easy to set up on my iphone just how I wanted them. You can setup to balance only when charging (ie all cells above chosen V). Starts balancing as low as .02V delta. App looks to be same as their BMS, showed balancing current of .7- .9A while in use and it drew from any cell to give to any cell (did not need to be adjacent). Doesn't look like there is a way to change from C to Fahrenheit, and the built in temp probe was hovering just below the 60C limit (which is changeable). If this product lasts in the long run it is well worth the money and piece of mind. ## 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: 0.01V； - [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 | #11,997 in Musical Instruments ( See Top 100 in Musical Instruments ) #7 in Equalizers & Feedback Controllers | | Brand | DALY | | Color | Smart Active Balancer | | Customer Reviews | 3.7 out of 5 stars 32 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 | | Number of Items | 1 | | 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 Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion - Image 1](https://m.media-amazon.com/images/I/61I9abwkQUL.jpg) ![DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion - Image 2](https://m.media-amazon.com/images/I/71NyW7s-5IL.jpg) ![DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion - Image 3](https://m.media-amazon.com/images/I/71ImZg6vDhL.jpg) ![DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion - Image 4](https://m.media-amazon.com/images/I/61n-4O9sAmL.jpg) ![DALY Smart Active Balancer 4S 1A with Bluetooth for LiFePO4 Li-ion - 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 ### ⭐⭐⭐⭐⭐ a DIY dream come true *by S***N on May 15, 2023* I live 5 months a year off grid, using a 60ah homemade battery to run fridge and some led lights. No BMS. The most I've used for 15 hours of nighttime is 200wh. For 3 years, I've charged the battery to 13.8v. I had a capacitor balancer, but never knew if it was working. Bought this active balancer, set the charge volts to 14.4v and watched in amazement, on my phone, the individual battery voltages rise, and the balancer doing its job. At 1 amp, balance happens pretty fast. Aside from a Victron SCC, this is my best solar purchase. The app is a little weird, since it's meant for a Daly BMS, but you can set the important parameters, like start voltage of balance and Delta of balance. Not so sure- tried it today and the balance just got worse, even when the battery was in absorption getting only 3 amps of input. Ended up with a delta of 0.150, charging to 14 volts. Tried it again a few days later: Set charge to 14 volt amps to 2 amps. All cells balanced out fine. Raised voltage to 14.4 , all cells balanced fine. My batteries are probably the problem- got one that's always lower. FWIW- the battery gained 10wh going from 14v to 14.4v. I don't see the point of pushing the battery to gain so little. I'll be charging at 13.8 or maybe 13.9v. Very happy with this balancer, even if it just showed me the cells voltage it would be worth the cost. ### ⭐⭐⭐⭐ Works! *by B***E on October 31, 2022* Ordered on the 19th, received on the 28th. Model # I received is HJ20 (4S). I am using this on my DIY LFP pack that previously had a cell voltage delta of .12V when charging - and getting worse (yes was top balanced first). First test and my delta was max of .027V! I am pleasantly surprised how accurate the voltage readings are, although not perfect. The parameters were easy to set up on my iphone just how I wanted them. You can setup to balance only when charging (ie all cells above chosen V). Starts balancing as low as .02V delta. App looks to be same as their BMS, showed balancing current of .7- .9A while in use and it drew from any cell to give to any cell (did not need to be adjacent). Doesn't look like there is a way to change from C to Fahrenheit, and the built in temp probe was hovering just below the 60C limit (which is changeable). If this product lasts in the long run it is well worth the money and piece of mind. ### ⭐ Daly has potential to be the best reliable bms equipment supplier however that’s not my experience *by M***. on May 9, 2026* Daly products have let me down too many times. Didnt get a chance to install it because the Bluetooth port in the Daly bms then it stopped working consistently so I stopped using it. Started acting up just before a very long sailing trip and then became a hazard. Spent many hundreds of $ on Daly just to be slow walked on a replacement for them when they died or started dying within a year, I gave up. Had to buy a different replacement bms and not sure what I did with it after I removed it. Was in touch with Daly when the Bluetooth ports and Bluetooth electronics were dead and dying. However I had to start my traveling before I would have been able to receive a replacement. Daly understood that I would contact them after my move to get it taken care of. I did contact them after I reached my destination however the unit had to be replaced during the trip and I don’t know where I put the unit. They wanted pics of their trouble shooting directions and I couldn’t provide that because of the situation. Therefore I threw away money again. I’ve been thru several Daly bms’s and none were reliable. Great ads they have but apparently the ones I’ve purchased were defective especially when needed for critical applications. Not happy and you should truly contemplate which brand of bms you use for an expensive lifepo4 battery bank. Daly makes money hand over fist with the bms’s but beware because you just may receive like I have and many others a bad piece of equipment. This review I didn’t really want to do but it is a necessity to give it. Good luck with your purchase. ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/472961877-daly-smart-active-balancer-4s-1a-with-bluetooth-for-lifepo4](https://www.desertcart.at/products/472961877-daly-smart-active-balancer-4s-1a-with-bluetooth-for-lifepo4) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-17*