In this video, I test the Lifepo4 SJY 12V 100Ah battery from the Aliexpress store. In fact, this is one of the cheapest Lifepo4 batteries assembled. I will test for capacity, resistance, disassemble and show the internal performance. The battery is assembled on the basis of new Gotion cells with a capacity of 102Ah. In the video, I will give general recommendations on how to check the battery after receiving it without disassembly.
This seller no longer ships orders from the site on Aliexpress. Motivating this by the short term of buyer protection on Ali. Probably, people open a lot of disputes, because of the long delivery and the Aliexpress platform does not like it very much. Therefore, SJY offers to buy a battery from their store on Alibaba:
🔋Lifepo4 batteries 12/24/48V from SJY store https://offer.alibaba.com/cps/pi8je8b...
🔋Lifepo4 cells 105/280Ah from SJY store https://offer.alibaba.com/cps/pi8je8b...

Also as an option, you can consider Lifepo4 battery Powerwin (on Aliexpress). There will be a review of it soon. Overall, a good battery for an adequate price.
*🔋Lifepo4 batteries Powerwin 12/24/48Vhttps://t.ly/S02
🎬 Playlist with videos on LFP, etc. AKB https://t.ly/LFP​

Useful Aliexpress Links
🛡🔋 Battery protection boards (BMS) for Lifepo4, Li-ion, LTO 🛡🔋
JK (Jikong) BMS of the new generation https://t.ly/JKN
JK (Jikong) BMS https://t.ly/JKB
LCD displays for JK BMS https://t.ly/JKD
100Balance BMS: https://t.ly/B100
Smart balancer 100Bal https://t.ly/B01
Daly BMS https://t.ly/Dly
Smart balancer Daly https://t.ly/baD
🎬 Playlist with videos on BMS https://t.ly/BMS


🔌🔋 Inverters 12-48V/220V automotive plan.
Nominal power is indicated. Clean sinus. 🔌🔋
🔌Decent 12-48V 2.5kW https://t.ly/in1
Testing the 12V version https://t.ly/IN1
Testing the 24V version https://t.ly/IN2
🔌DATOUBOSS for two voltages 12/24V https://t.ly/Dat
Video with tests https://t.ly/IN7
🔌DATOUBOSS 12V 1-1.5 kW https://t.ly/in3
Video with tests https://t.ly/IN4
🔌Baseus 12V 500W https://t.ly/in5
Video with tests https://t.ly/IN6
🔌 Budget. 12-24V 1.5kW https://t.ly/in4
Video with tests https://t.ly/IN5
🎬 Playlist with videos on inverters https://t.ly/inV


🔌☀️ Solar hybrid inverters with MPPT.
Battery charge from the sun and the network. Adulteration.
Uninterruptible power supply. 🔌☀️
☀️Deye https://offer.alibaba.com/cps/pi8je8b...
☀️PowMr 1.5/3kW 12/24V https://t.ly/pw1
☀️PowMr 4.2/6.2kW 24/48V https://t.ly/pw2
☀️PowMr 10.2kW 48V https://t.ly/pw3
☀️ECGSOLAX 1.0/1.5kW 12/24V https://t.ly/Ecg
☀️ECGSOLAX 4.2/6.2kW 24/48V https://t.ly/EcG
☀️Easun/ECGSOLAX 1.8/3.0kW 12/24V https://t.ly/Eas
☀️SRNE 5kW 48V https://t.ly/sr5
☀️GROWATT 6.0kW 48V https://t.ly/Gro
☀️EPEVER MPPT controller 10-40A https://t.ly/Epe
🎬 Playlist with video reviews and tests
solar hybrid inverters https://t.ly/Sol


⚡ Chargers ⚡
Charger 12-200v, 600-1500W (regulation I, U) https://t.ly/cg4
Charger 12V 6A https://t.ly/Cg1
Charger 12V up to 100A https://t.ly/cg2
Rechargeable 24V https://t.ly/cg3
Charger Liitokala 1.2-3.7V https://t.ly/cg5
🎬 Playlist with videos on charging devices https://t.ly/cgv


📟 Measuring and testing devices 📟
Clamp-multimeter HT208D https://t.ly/htd
UNI-T multimeter pliers https://t.ly/Uni
Battery tester EBC-A40L https://t.ly/ZKe
Battery tester EBC-A20 https://t.ly/ZKE
Thermal imager TOOLTOP https://t.ly/Too
Internal tester battery resistance YR1035+ https://t.ly/1035
Internal tester RC3563 battery resistance https://t.ly/RC3
Electronic load DL24 https://t.ly/DL2
Portable oscilloscope ET120M https://t.ly/osc
T7 transistor tester https://t.ly/tT7
HV transistor tester 120-2700V https://t.ly/tHV
🎬 Playlist with videos on measuring devices https://t.ly/vym


🛠️ Tools and auxiliary equipment 🛠️
Laboratory power supply https://t.ly/lbp
Riden Health Care Panel https://t.ly/rdn
Spot welding Docreate https://t.ly/wel
Dynamometric nozzle 2-200Nm https://t.ly/mxi
Digital microscope AD209 https://t.ly/ANd
Crimp for wires 6-50mm2 https://t.ly/50b
Hydraulic press 4-70mm2 https://t.ly/YQK
🎬 Playlist with videos on instruments https://t.ly/Ins

Support the channel https://t.ly/don

00:00 inspection and equipment
01:41​ characteristics and parameters
04:18​ how to check the battery, whether it is made on new cells
06:39​ battery weight
06:44​ charge the battery with a current of 40A using the MS-1500 power supply unit
08:07​ battery capacity testing through DL-24
09:06​ ext. resistance of the battery assembly
09:14​ internal execution
13:06​ lifepo4 cells
15:43 ext. cell resistance
17:43​ cell capacity test with a current of 40A
19:17 checking the BMS parameters
22:03 checking temperature protection and foam for flammability
24:50 testing under a load of 170-213A
28:47 long-term load 580 W and delivered W*h
35:24​ shipment of AKB with Ali with two track numbers
36:32​ conclusions