Why do you need this and a bms? the bms is supposed to balance as well?

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.

can the 20s also be used for a 14s and 16s battery and Lifepo4 and LI

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.

Will this balancer work without a BMS?

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.

Why does daly balancer show diferent voltage on the app from my original bms? Some times in 30 mV diference

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.

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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.

Product ID: 472961877

Details

Brand
DALY
Color
Smart Active
Input Voltage
3.7 volts
Item dimensions L x W x H
2.36 x 1.38 x
Output Voltage
3.7 volts

⚡1A balanced current output

📶Bluetooth app real-time monitoring

🔋Supports Li-ion/LiFePO4 batteries

¥9310

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Description

🔋 Stay charged, stay ahead — balance your battery like a pro!

UNIVERSAL COMPATIBILITY - Works flawlessly with any BMS brand and multiple lithium battery types
24 7 INTELLIGENT BALANCING - Continuous energy transfer ensures consistent battery life anytime, anywhere
COOL EFFICIENT OPERATION - High-efficiency design minimizes heat and energy loss for safer use
PRECISION VOLTAGE EQUALIZATION - Achieve ultra-accurate 0.01V balancing for peak battery health
SEAMLESS BLUETOOTH INTEGRATION - Monitor and control your battery status effortlessly via smart app

The Daly Battery Equalizer 4S 1A is a smart active balancer designed for Li-ion and LiFePO4 battery packs, delivering precise voltage equalization (0.01V accuracy) with up to 1A balancing current. Featuring 24/7 intelligent balancing independent of charge state, Bluetooth app connectivity for real-time monitoring, and compatibility with any BMS brand, it extends battery life while operating efficiently with minimal heat generation.

Specifications

ASIN	B0B5LJY981
Best Sellers Rank	#179,599 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #774 in Power Converters
Brand	DALY
Color	Smart Active Balancer
Customer Reviews	3.6 3.6 out of 5 stars (31)
Input Voltage	3.7 volts
Item Dimensions	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 Type	Type A
UPC	768655913440
Unit Count	1 Count

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¥9310

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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