How to test 26650's on an imax B6

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harrisonpatm

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On my last batteryhookup order I got a pack of A123 26650 LFP cells from medical laser treatment, or whatever. Just for fun really, I mostly process and test laptop 18650s, but LFP is good for some outdoor applications, thought they would be handy to have around.

batteryhookup.com

Module with 6x A123 3.2v 2500mah 26650 cells 3s2p

These modules are awesome because the case you can open with just a flat screw driver. The modules have 6 cells in 3s2p configuration and each comes with a BMS. The BMS we believe is a 10a BMS because the main wires are 16 gauge. You can charge and discharge through the BMS so it is not...
batteryhookup.com batteryhookup.com

Since all my equipment is setup for 18650s and Li-Ion, how can I discharge test these? I have an Imax B6 tester that has settings for LFP, but I don't have a good way to secure leads to the cell. Can someone recommend a method to discharge test these for checking capacity?

If I need to purchase a different charger, tester or piece of equipment, I'm just going to skip it, I don't plan of processing this size of cell or chemistry on a regular basis.
 
OPUS has a slider switch inside you can set for LifePo4 and then use the charge/discharge cycles as you would for 18650 lithium-ion.

Maybe 2 of them would fit? Or, extend the normal contacts with a wire/magnets hack?
 
Last edited:
OffGridInTheCity said:
OPUS has a slider switch inside you can set for LifePo4 and then use the charge/discharge cycles as you would for 18650 lithium-ion.

Maybe 2 of them would fit? Or, extend the normal contacts with a wire/magnets hack?
Click to expand...
Nice! I have 1 opus. Looks like 2 of them will fit. Thanks for the tip
 
harrisonpatm said:
Nice! I have 1 opus. Looks like 2 of them will fit. Thanks for the tip
Click to expand...
Cool. Here's the hidden switch
1666643142889.png

From one of our favorite youtube personalities :)
View: https://youtu.be/GDUikK7jQoo
 
harrisonpatm said:
I wonder why this feature isn't advertised, or why the switch is hidden/not easily accessible.
Click to expand...
My guess would be the limited understanding of the difference between 3.7v LiPo and 3.2v LifePo4 cells.

I can see the headlines now "It fit in my charger and then my house burnt down!!! Switch, what switch? Oh, I forgot to switch it back..."
 
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