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General Discussions => Tech Talk => Topic started by: Friendly Angel on March 13, 2017, 03:08:52 PM

Title: Electronics and Batteries
Post by: Friendly Angel on March 13, 2017, 03:08:52 PM
(http://i.imgur.com/X8LYa6v.png)

I have an action cam that uses batteries like this - the battery slides into the camera and the little terminal squares contact some springs inside the camera.

I have six of these batteries.  Frequently I can't get the camera to turn on and I think it's because of poor contact at these terminals - sometimes it helps when I lick the battery first and some batteries work better than others. 

I've seen some kinds of paste and gel that are supposed to be for conductivity but I'm not sure what to look for.

I've tried cleaning off the camera and the battery contacts.

Anybody got some ideas?
Title: Re: Electronics and Batteries
Post by: Pusher Robot on March 15, 2017, 01:55:28 PM
This can happen if you have a layer of oxidation.  Try to abrade the contacts with fine sandpaper.  Don't use steel wool unless you are very confident the battery is completely discharged.*

* Lesson learned the hard way
Title: Re: Electronics and Batteries
Post by: The Latinist on March 15, 2017, 03:27:18 PM
 The problem is, the oxidation is likely on the contacts inside the camera. It may be impossible to reach them.
Title: Re: Electronics and Batteries
Post by: Friendly Angel on March 15, 2017, 03:39:36 PM
The problem is, the oxidation is likely on the contacts inside the camera. It may be impossible to reach them.

The thing is though, it works with some of my batteries but not others... that makes me think it's not the camera contacts.

And those little contacts on the batteries are so thin, I think sand papering them would leave nothing behind.  Maybe I'll try it on one of the older ones.

Nobody's ever used the conductive gel stuff?
Title: Re: Electronics and Batteries
Post by: Fast Eddie B on March 15, 2017, 05:09:35 PM

Nobody's ever used the conductive gel stuff?

Aircraft owners often use this stuff:

Stabilant 22, 5ml Kit Makes 30ml of 22A - 22 https://www.amazon.com/dp/B001E50GQS/ref=cm_sw_r_cp_tai_Z0AYyb4GZ76RS (https://www.amazon.com/dp/B001E50GQS/ref=cm_sw_r_cp_tai_Z0AYyb4GZ76RS)

Title: Re: Electronics and Batteries
Post by: Friendly Angel on March 15, 2017, 05:12:42 PM

Nobody's ever used the conductive gel stuff?

Aircraft owners often use this stuff:

Stabilant 22, 5ml Kit Makes 30ml of 22A - 22 https://www.amazon.com/dp/B001E50GQS/ref=cm_sw_r_cp_tai_Z0AYyb4GZ76RS (https://www.amazon.com/dp/B001E50GQS/ref=cm_sw_r_cp_tai_Z0AYyb4GZ76RS)

Thanks!  $65!  Fortunately it comes in packages for smaller applications.
Title: Re: Electronics and Batteries
Post by: SQ the ΣΛ/IGMд on March 15, 2017, 07:33:01 PM
Dielectric grease is probably what you're referring to. I use it all the time.
I'm an electronic tech so I'd have no problem opening that thing up and checking the contacts.
But if you're new to it, probably not a good idea.
Likely those contacts corroded or bent slightly.