AB02S GPS and memory battery

#1

Hello,
I bought an HTCC-AB02S V.1.0. at the back we can see the possibility of soldering a memory battery for the GPS:

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Can you confirm that this is for the backup of the GPS and so that it can resume the GPS position faster?

And what kind of battery should you solder?

thank you,

#2

hi,

This is a super capacitor. The courier do not allow transportation of such capacitors. We had to remove it.

Q: Can you confirm that this is for the backup of the GPS and so that it can resume the GPS position faster?
A: Yes, the purpose of the capacitor in this position is: When the development board suddenly loses power, it is used to back up GPS information.

There is a downside to using farad capacitors: When your development board needs to enter low power consumption, the super capacitor will have a charging process, which will extend the time for the development board to enter low power consumption.

#3

BAYMAK| XH414H-IV01E 3.3V/0.07F farad capacitors 4.8*1.4 super capacitor

#4

C49 is missing…


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image.png800×379 68.4 KB

However, the D5 diode is there, so VBACKUP voltage is supplied from main battery source. Thus, GNSS TTFF should not deteriorate that far.

#5

Hello,

thank you very much for this reference. I want to cut the battery when I shut down the system.

So I’m going to solder this super capacitor.

Thanks for your help,

Christophe