[CM3/Raspbian] How to fix the wrong battery information?

DevTerm
1

Hi,

I have a DevTerm with CM3.

And I installed two 3.6V 3500mAh 18650 batteries. (≒ total 25.2 Wh)

But ‘upower --dump’ command shows the below messages.

…
energy: 8 Wh
energy-empty: 0 Wh
energy-full: 8 Wh
energy-dull-design: 0 Wh
…

Why the ‘energy-full’ is 8 Wh but not 25.2 Wh?

Or have I fake batteries?

2

can you share info on the batteries? brand + link to website you ordered from?

3

I bought KDsafe 18650 3500mah battery from South Korea.

4

from what i can tell these should be okay but i’m not a native speaker/from SK so i cant say for sure, i would recommend you get a pair from a brand likr LG or sony or samsung, and test to see what results you get with those. it may just be a software issue, but testing with different cells can help figure out if its the batteries themselves or not.

5

Discharge and charge using the DevTerm, that should “fix” this info. Currently it knows nothing about the battery

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7

I replaced it with new batteries and got the same result. (Samsung SDI INR18650-35E cell with protection circuit)

…
energy: 0.05 Wh
energy-empty: 0 Wh
energy-full: 8 Wh
energy-full-design: 0 Wh
…

Should I change something or remove the protection circuit?
[/quote]

8

It is not the batteries. The chip have no way to know the battery information.

You need to do a couple of cycles of charge/discharge with the battery for the chip to know about the battery!

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