Forum Thread

soldering iron

sandmans42 2,134 516 March 29, 2016 at 04:13 AM
could have posted this under looking for deal but I think I'll have luck in this thread because you guys would be using them... I am in need of replacing a tablet battery that is soldered to a board and need a soldering iron. I checked ebay and just was wondering if you guys had any suggestions. slick and does the job. thanks!Cool

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#2
What kind of features are you looking for???

I've had a weller WLC100 iron for years, works fine, just find the adjustable dial pointless without temperature readout and the entire thing is bulky. I just upgraded to a TS100 on banggood. Thought it was going to be cheap and a scam, but after reading reviews jumped and so far so good. The lab techs where I work use digital Hakko machines and have no complaints about them and that's every day type usage.

Guess it just depends on what you want. If it's just for a one time job just get the cheapest thing you can find.
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#3
yeah just a one time use.. cheap cheap.
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#4
Quote from sandmans42 View Post :
yeah just a one time use.. cheap cheap.
I mean there is always the basic harbor freight 25W iron or the likes. It will work. You want a pretty fine tip as well. More important is you want something designed for electronics not pipes. If this your first time soldering practice on something first and get comfortable or have someone who is do it. Your expensive tablet isn't the place to learn. Smilie
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#5
Circuit Specialists has some decent soldering equipment.
If you have not done any soldering before this may be a challenge! If your tablet is worth more than $50 you may want to ask people you know if any of them do soldering. If you really want to do this yourself do some research on tip-tinning, flux, solder wick, and get some 60/40 ELECTRONIC solder. Lead free ELECTRONIC solder is a PITA. If you insist on using lead free electronic solder get some with silver. Good Luck!
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#6
Quote from jopho View Post :
Circuit Specialists has some decent soldering equipment.
If you have not done any soldering before this may be a challenge! If your tablet is worth more than $50 you may want to ask people you know if any of them do soldering. If you really want to do this yourself do some research on tip-tinning, flux, solder wick, and get some 60/40 ELECTRONIC solder. Lead free ELECTRONIC solder is a PITA. If you insist on using lead free electronic solder get some with silver. Good Luck!
By 60/40 electronic solder I think your talking about solder with Lead. I also recommend that. Wash you hands after, have ventilation and you will be just fine. It's much easier to use.
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#7
Quote from sandmans42 View Post :
I checked ebay and just was wondering if you guys had any suggestions.
ebay wouldn't be my first choice. too many bad options.

The wattage of iron that's appropriate depends on the design of the tablet. Don't go too small, it will take too long to heat up and you could potentially damage the battery. I'd aim for at least 40W, you want an iron not a gun.

I'd honestly buy local, microcenter, jr, frys, radio shack, home depot, lowes, and ace all sell soldering equipment. At hardware stores, you want to make sure you buy solder for electronics not plumbing.

A small chisel tip will work better than a conical one.
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Last edited by jkee March 29, 2016 at 04:02 PM
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#8
Quote from jkee View Post :
ebay wouldn't be my first choice. too many bad options.

The wattage of iron that's appropriate depends on the design of the tablet. Don't go too small, it will take too long to heat up and you could potentially damage the battery. I'd aim for at least 40W, you want an iron not a gun.

I'd honestly buy local, microcenter, jr, frys, radio shack, home depot, lowes, and ace all sell soldering equipment. At hardware stores, you want to make sure you buy solder for electronics not plumbing.

A chisel tip will work better than a conical one.
That being said a Conical tip will probably be smaller and work fine. OP also has to worry about too much power and overheating the board just like slow and holding it there for a while. It's a balance.
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#9
Quote from LiquidRetro View Post :
That being said a Conical tip will probably be smaller and work fine. OP also has to worry about too much power and overheating the board just like slow and holding it there for a while. It's a balance.
I should have said a small chisel tip, but it depends on exactly what you're soldering.
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#10
Get one from Harbor Freight. I like the gun style. We have 30 of them at our makerspace for teaching kids.
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#11
Quote from randomslickdealer View Post :
Get one from Harbor Freight. I like the gun style.
That might be the worst advice of the week.

Soldering guns are generally not appropriate for most electronic soldering. They pass a large current through the tip which can damage sensitive electronics. They have poor temperature regulation, they can get too hot or if you don't hold the trigger long enough they'll be too cold and you'll get cold solder joints. Compared to an iron, soldering guns are also big, heavy, awkward, and hard to control. Say NO to soldering guns.

If you're going to try to teach someone how to solder, you REALLY need to learn how do do it correctly yourself first! Tools like this from harbor freight are also tricky as they aren't always actually UL certified.

If you want to learn how to solder, I suggest this free guide which is quite thorough and has many different sections: http://store.curiousinventor.com/..._To_Solder
These days surface mount soldering is probably a more useful skill than through hole soldering, another reason to prefer a soldering iron and preferably a decent one.
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#12
thank you all for the replies!!..bigger challenge than i thought for a newbieRoll Eyes (Sarcastic)
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#13
I highly recommend the hobbyking.com solder station (Yihua 936) for less than $20 it is an excellent copy of the venerable Hakko 936. I have one and you can buy a variety of tips on ebay for about .99 each. For a small battery in a tablet I would use a fine pencil tip. Soldering is a skill so practice before doing the tablet battery.
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#14
Quote from sandmans42 View Post :
thank you all for the replies!!..bigger challenge than i thought for a newbieRoll Eyes (Sarcastic)
Soldered in batteries aren't that common, at least in teardowns I've bothered to look at. What's the model of this tablet?

It's easy to do some damage if you aren't careful. I you take a few hours to read guides and watch videos and at least an hour practicing on some old electronics you could probably do it. If you don't have any old broken electronics around, buy something at good will. Practice using desoldering wick.

Power connections are always harder, the traces/pads/wires are bigger and it's harder to heat things just right without over heating.

Feel free to ask any questions you have.

Quote from Lumpy05 View Post :
I highly recommend the hobbyking.com solder station (Yihua 936) for less than $20 it is an excellent copy of the venerable Hakko 936. I have one and you can buy a variety of tips on ebay for about .99 each. For a small battery in a tablet I would use a fine pencil tip. Soldering is a skill so practice before doing the tablet battery.
That's a good option, but you're better off with the fine chisel tip. Also if you buy other tips, I'd recommend the genuine hakko tips over the knockoffs. The cost is difference is minimal and they work better.
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Last edited by jkee March 31, 2016 at 11:45 AM
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#15
[QUOTE=jkee;83336754]Soldered in batteries aren't that common, at least in teardowns I've bothered to look at. What's the model of this tablet?

Sero 8 unfortunately. I have replaced the the sero 7 pro which it just snaps in place. I have not taken the cover off, but this is what i found:


https://www.ifixit.com/Guide/Hise...ment/39796
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