Uploaded April 2026 | Updated September 2026, 1 week ago

---

Link to the battery: amzn.to/4tA73AS
🔋 My recommended batteries: cleversolarpower.com/batteryreviews
📖 My Best-Selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified
🎁 Free Diagrams: cleversolarpower.com
Video to other reviewer: youtu.be/iABKHY2Q5zo?si=D_b6viXTjMBdW49G&t=1475

In this video I review the WattCycle 12V 100Ah Bluetooth Mini LiFePO4 battery. This battery is from the European warehouse but the one in the US is the same. I run a full capacity test, open it up, inspect the cells and BMS, test the temperature protection, and run it in parallel with another battery to check current sharing.

I found several issues with this battery including swollen cells, a low balancing current, a high MOSFET temperature disconnect threshold, and concerns around the balance wires. WattCycle responded to my findings and I include their response at the end of the video so you can judge for yourself.

Battery review terms: cleversolarpower.com/reviewterms

00:00 intro
00:36 capacity test
01:36 parallel discharge test
02:16 opening the battery
03:50 first look inside
04:40 thermal imaging test
05:23 high current discharge test
06:06 battery internal structure
08:14 swollen cells
09:46 BMS
10:53 temperature tests
14:53 APP
18:16 conclusion
18:53 company response