Thread: Garmin Streetpilot C320

Mr. Butters, you are indeed a person of knowledge, a scholar and a gentleman. Thank you for the detailed info.

The idea with the message is a very welcome one. Sure gramps would appreciate a personalized message :D Please, do a splash screen that says ( inside the quote ):

"Generale Spori, molimo obratite pozornost na pedalu gasa koja se u vozilu nalazi dolje desno. Nakon pokretanja vozila, istu je potrebno pritisnuti do kraja!"

"General Slow, please pay attention to the gas pedal, which is located on the lower right side of the vehicle. After starting the vehicle, it must be pressed all the way in!"

One question, if I may... battery inside of the Streetpilot is, me thinks, a 18650 2000 mAh cell I replaced quite some time ago. I distinctively remember it had some sort of an integrated circuit on it, connected to the plus and minus side of the battery, and then to the cables and the connector. Anyone knows what that specific IC is? It did not look like standard battery protection module. Probably some proprietary crap Garmin added just to mess with possible homebrew battery replacements. Asking because there is a high capacity unused Molicel P42 battery I have lying around and would like to "upgrade" the device with some hardcore "going around Europe on a single charge" type battery life. And also, it's a known fact gramps will forget the charger wherever he is off to...

EDIT ( Battery shenanigans ): Opened the unit up and did some tests. It's some sort of a charging limiter. Output directly from the Streetpilot motherboard is 4.12V, and adding the IC to the mix makes the charging output to the battery come down to 4V. I guess it IS some sort of overcharge protection, since this specific model does not have any type of sensor on the charging circuit, or it does not follow any CC/CV Li-Ion charging curve. Even without the battery, after plugging in the mini USB charger, screen says "Charging battery" So, if anyone wants to change the battery like me, be sure to return the IC back to the replaced 18650, or else there is a big chance you'll be rather unpleasantly surprised when the battery... well, explodes.