I did a search and couldn’t find any pictures of a battery with a solder blob added to the top. So I decided to try it myself with some pana 2900 laptop pulls and I took pics of the finished product. I got to tell you it was easier than I thought it would be. All you need is to scratch up the surface with a file and add a nice smear of flux. I added a good amount of solder to my irons tip and touched it to the flux on the battery until the solder transferred to the battery. You can add more solder after the solder is cool to the touch to make the blob bigger. Still be cautious not to heat up the battery too much to avoid a dangerous situation I only held the iron tip to the battery for about 2 seconds.
I did the same thing to a lot of flat tops I got. Used my dremal and sanded the tops (very quick) so the solder would grab really good. Easiest thing is adding ton's of solder to the tip of the iron, then let it just fall off at the last second onto the positive terminal. As for how long the solder will stay on the terminal, I'm not sure, but it looks to be solder as 1 smooth, albeit slightly rounded button top. Next time, If I decide to do it again, I think I will find some small flat circle metal pieces, and solder it to the + terminal and sandwich solder in between it. Seems like it would be better than just having plain solder on the terminals.
Thats a pretty good idea. Now that I think about is, use a tiny hex pin like this and just dremel off the stem. Seems like it would be perfect for the terminal. Or better yet, just cut the steel pin into slices. like a loaf of bread, and looks like you could have 6-8 perfectly round pieces to solder to the terminal
Wow, that's like the perfect thing to make them button top! nice find! So you just fill the belly with solder, then put over the terminal and touch the brass letting the solder melt onto the top?
Probably would be good to smooth out the edges with a dremel or grinder and make then slightly curve so it doesn't scratch whatever it touches, I would think.
Very nice, gonna add to my saved list and order next time I place an FT order.
Sure looks that way…just a little bubble of solder, flip it over, hit the top with a soldering iron, solder inside melts and bonds the entire thing down to the top…very cool! If/when the battery dies…just hit it again with an iron…and voila reusable button top!
Ya, I just broke down and ordered 3 packs of them. I don't really like having just solder on the tops. Just the right amount of shake and inertia and there goes the solder.. bouncing around inside the light. Can you say short circuit! Using these at least I will feel more secure now my batteries have quality brass securely soldered into place! $5 for ease of mind is better than me always wondering if the solder is gonna give out at any given moment.
RMM instructions “e cause I had some Samsung 20rs I wanted to use in my modded small sun with a MTG2 emitter n for that wow factor and so far they have lasted since February n and they are still on solid just look terrible.
I have solder blobs on some of mine from over a year ago and they are still great. You can tell if they are Iffy. When they are done right they are not coming off without de-soldering them.
So yours don't have any dents at all over the past year? mine has been a month or two and alrready has dome dentage in it. Maybe its this lead free solder crap I used. I'm just paranoid! In my head I can see the possibility of solder becoming brittle and breaking off with enough bouncing around in a flashlight.
No need for scratching / sanding / grinding before soldering.
Just use some flux.
I have a bonkote flux pen which is awesome handy.
But with the resin core of the solder itself, it can be done too.
Just get it hot enough.
The top of the batt. can be heated without heating the internals of the cell.
