Finevu CR300HD/CR500HD battery replacement

[Adrianli]

So my Finevu CR300HD and CR500HD battery went dead. Thatz the normal thing for Finevu car cameras with lithium polymer batteries. After reading dashcam forum on how others replace their battery, I going to replace mine my way. I was thinking, since the lithium polymer will be dead in one year's time, why not just solder a connect and replace the battery externally. Much easier than open up the camera again. So my journey starts :

 

Forum read was here : https://dashcamtalk.com/forum/threads/problem-with-the-finevu-cr-300hd-internal-battery.1083/

 

Detailed instructions of how to strip the camera here : http://www.blackboxmycar.com/blogs/news/10846777-battery-replacement-instruction

 

 

 

 

 

I opened up mine as per above instructions. Remove the battery, de-solder the circuit board from the battery and solder the JST connector wires. Using my dremel, I drilled a nice clean hole thru the two casings.

 

 

[Adrianli]

Every part is in place, time to assemble back the camera.

 

 

 

 

 

The battery used is R/C grade battery. Single cell, 950mah. Original battery was single cell, 200mah.

[Adrianli]

Lastly, I use heavy duty double sided tape to stick the battery to the camera. Giving it a clean nice look. Swapping batteries is easy now.

 

Both of my Finevu cameras :

 

 

 

 

 

 

 

Plugged into pc and update the date and it is working.

 

Thanks for reading. The End.

[Dkc135]

I managed to change the battery. End result wasn't very successful as I was lazy, tried to drill the hole with the circuit board under the cover! it drilled right through the white battery wire and part of the pcb ... sucks ... Now reattaching to see if the pcb is damaged ... soldered back the white wire ... 2 hrs for me ...

 

Anyway, thanks for the clear and detailed info, Adrian! The photos helped a lot.

Edited January 16, 2015 by Dkc135

[Solar]

Lastly, I use heavy duty double sided tape to stick the battery to the camera. Giving it a clean nice look. Swapping batteries is easy now.

 

Both of my Finevu cameras :

 

Finevu Mod 007.jpg

 

Finevu Mod 008.jpg

 

Finevu Mod 009.jpg

 

Finevu Mod 010.jpg

 

 

 

Plugged into pc and update the date and it is working.

 

Thanks for reading. The End.

 

hi bro, thanks for sharing.. mine is also not able to hold charge to report the correct date/time..

could u advise if a AA size 3.7 rechargeable litium ion able to work like the lipo battery?

 

i'm kind of concern the thing will start burning up.. 

[Adrianli]

hi bro, thanks for sharing.. mine is also not able to hold charge to report the correct date/time..

could u advise if a AA size 3.7 rechargeable litium ion able to work like the lipo battery?

 

i'm kind of concern the thing will start burning up..

I don't know leh. There is a circuitry for the lithium polymer battery. So don't know if it will work with lithium ion battery.

 

Lithium polymer battery nominal voltage is 3.7v

Lithium ion battery nominal voltage is 3.6v

 

So it might overcharge the lithium ion battery and then boom. Same as Samsung Note 7. Which is not very ideal inside the car.

 

You can try outside the car and see how it goes. Then install it in your car if it is safe.

[Solar]

I don't know leh. There is a circuitry for the lithium polymer battery. So don't know if it will work with lithium ion battery.

 

Lithium polymer battery nominal voltage is 3.7v

Lithium ion battery nominal voltage is 3.6v

 

So it might overcharge the lithium ion battery and then boom. Same as Samsung Note 7. Which is not very ideal inside the car.

 

You can try outside the car and see how it goes. Then install it in your car if it is safe.

 

okie thanks bro.. i've actually done the lipo as per your demo.. great stuff!

then later recalled how lipo burns... scary...

 

that's why thought maybe try to see if there's an alternative, such as li-ion..