Full test results of a 12V 4s2p 240AH battery pack

[mchamster]

Long time lurker ... Thanks for all the information in this forum.

Last week, I built a 12V 4s2p 240AH battery pack with LiitoKala cells and got a Rigol DL3021A Electronic Load. The pack was charged to about 95% and then discharged leaving about 5%, mostly because I didn't want to put too much stress on the new battery. The battery was discharged at a constant current of 17A.

As a way to return a little something to the community that I have taken so much from, I offer my full raw test results. Feel free to use this any way you want.

Cells used:

• https://www.aliexpress.com/item/1005002600357563.html?spm=a2g0s.9042311.0.0.3c0d4c4dViW8Cl

Raw test results:

• https://docs.google.com/spreadsheets/d/1HrAQH-SI4GVIMjDyGYK_XYRP-vjm7FdEam_Uxf_fx9o/edit?usp=sharing

For myself, I used the information to create my own discharge table. The table leaves 10% available capacity below 0%, so it's not a true discharge table but one that will help extend the life of the battery and gives me a bit of a reserve.

Have fun with this!

Percent	Volt (12v)
100	13.8000
90	13.2311
80	13.2250
70	13.1880
60	13.1238
50	13.0865
40	13.0615
30	13.0204
20	19.9500
10	12.8320
0	12.6717

This measured with a 4-wire Load test and collaborated within 0.1mv against my bench multimeter. I trust these results.