Very good and helpful information. There is another reason you should cut the internal battery pole: you are effectively charging the dead battery. This is very bad and may lead to them leaking over time.
If you notice the internal battery at 4:07, it's quite small and cannot possibly contain enough to significantly leak, especially not in the original well-sealed container. You might argue the side hole created for the connection is a potential weak point, but unless the PC is like the IBM 5155 Portable, I don't think it could ever be a problem.
@@squirlmy I take it you have never seen what happens when that type of cell is recharged. Also that cell shown is just a representation and not what is inside the Dallas module. they can explode at worst case and catch fire with a small trickle charge.
Few notes: I always disconnect the internal battery as it is non-rechargeable and isn't supposed to be charged. Also the battery might be degraded to a point where the current drain of it can be quite high. I would suggest you to use a micro (or nano) ampere meter to measure the current when the battery is disconnected or not.
Hi! I hope that everything is all right with you :). what a nice valid point that the internal bat. drains the CR2032 faster, I didn't think of that, I just do the mod using some salvage battery holders from mobos that are not working, they have a low profile and it is a nice way of reuse some parts before sending the mobos to the bin. Waiting for another video! Thank you for taking time to produce some very interesting videos. Be well my friend, regards from Portugal!
Hello Jorge! Nice to see you here again :) I am fine, thank you and hope you are all right too? I'm glad you liked it. The last video about this mod was obviously quite interesting for many people and there were some questions regarding the drain, so I decided to make an update. More videos will follow! Thank you for watching!
"it is a nice way of reuse some parts before sending the mobos to the bin" AAARGGH!!!!! There is no reason to EVER send these motherboards to the "bin"!!! At this point most are "vintage" and are collectible. There is certainly a market and many people collect these as DOS-gamers. Save it or sell it!
I also would cut the connection to the internal battery. As others mentioned, the current draw might be higher than in your case, also shouldn't be charged - yes. But, those modules are not only found on old mainboards used nowadays by hobbyists. They are also very common on industrial PCs, and they have been running since the late 90s. Having battery die one year after replacing it is gonna be problematic. If done properly, the industrial system, usually some CNC machine, can then work for many years without needing to have the battery replaced.
I have one of these suckers on a nice later socket 7 board. The fecker is soldered with the battery side facing directly against some power MOSFETs with those branching black anodized aluminium flanges that were popular during the pentium era. There's no way to do it without desoldering it and even then bodge wire can't be thicker than a couple of mm.
thankyou for these videos on the battery replacement - i just added the coin cell battery holder on a biostar 486 pci motherboard and it seems to have worked. i managed to set the hard drive size and reboot into ms dos so i assume it works as intended (this motherboard can't boot without bios settings). the moment I started packing it back up to install it into the case however, my bad soldering broke and my ground wire came off lol. lets see how i can get it fixed again tomorrow :)
I'd like to stress out how important is to solder the wire that goes to ground on the inward side. I made the mistake of doing it on the outside and the solder joint broke, leaving me with a big ? :) LOL It was useful but you should pay attention to what's inside the socket as I have a couple boards with some IC, like with bios sockets.
Yes, it is indeed very much dependent from the environment, how to add the external battery in a best way. As I showed in the video, sometimes it is better to make it upright, sometimes you have so little space at the top, that it's better to add a battery using two cables and external holder from the side. Sometimes the ICs are sitting so tightly, that you don't even have space to add a drop of hot glue to better keep the cables in place. So, yes, you have to analyse, which way is the best, but at least the electrical part is always the same :)
A while back I went full metal jacket on one of these modules and cut out original battery. Left the original terminals for remote external battery. I do not recommend such a action generally but hey... A true hacksaw and file job that!
hello, very good modifications and video. i have MB model ROCKY-3702EV with DS12C887 but the motherboard do not do nothing... i have two cuestions (1) if the DS12C887 do not have internal battery the integrated circuit will not work? / (2) in case of DS12C887 dosent work, this will afect the motherboard?, because i do not have inicial start (dead mother board)
The module should work even with an empty battery. So, if your mainboard doesn't start at all, either the module is dead, or your mainboard. The battery is only needed to keep the BIOS settings and the clock.
Hi, Citizens. At 2:05 you seem to work with a Dallas Ds12b887, I dont have the electric plan of this battery and you have not drilled a hole into this one, I suppose that your red wire is connected on the positive contact, so its ok if We have drilled a hole in the opposite side, between the two groups of 3 pins ! Otherwise, No matter of where is the hole into the negative or the positive contact of the inner battery both are a good place for the drill, is it exact ? Your external module has the negative and positive wires going unto the battery and are They soldered together in the same hole or They have into this a tiny seperation, 1 mm, 2 mm ? Thx for you time, if you got it ! Anyway thx for all your videos.
@@necro_ware Sorry, which pin number has the positive internal battery? I don't want to destroy the wrong one and my RTC has different pins cutted off. Thanks in advance. That's one is to bring an AW4416 alive back!
@@nelbazan8391 Hi! Please see at 1:09, if you mean that. Which model of the RTC module do you have? Usually the missing legs are always the same. If it doesn't look like the one I'm modifying in the video, may be this approach is not applicable to your module, so be careful. And if your module has really the same pinout and the pin 20 on your module is not missing, then you don't need to drill anything. Just try to solder + directly to the pin 20 and - to pin 16 or pin 12.
@@necro_ware Thanks for your prompt reply. Mine is a sort kind of "pirated Dallas" as doesn't have the same quality as the original. I bought it little time ago but battery came empty so it's my test specimen XD. That's no problem with pin 20 as it was clear perfect with your explanation , the one I'm looking for is the internal cell coin to short it to avoid battery drainage. Anyway I'll try to find out! Thanks so much and stay safe!
@@nelbazan8391 thank you! I hope, I got you right. The pin 20 is the one where the + of the internal battery is going to. If you want to cut it, you have to drill from the side right above the pin 20. The metal part inside is the continuation of the pin 20, which goes to the internal battery. If you cut this metal you will disconnect the internal batteries + from the pin 20, where you can solder an external battery to.
I just did this today to a Dallas RTC battery in an old Gateway 2000 that I recently picked up. I didn't think it'd work but it does (although the bending back of the pins made them weak so they may break next time I remove the dallas module). I used a grinding bit on my drill (once you get past the plastic you'll grind thru the epoxy/glue stuff inside before you are greeted with the shiny contacts inside.) One thing though is will the battery inside the dallas module ever decide to leak and destroy the module's inside or even worse leak its stuff externally and onto the board?
From comments I've seen on other videos about this, the likelihood of this is low. Both due to battery chemistry not being the leaky kind, and the fact that it's epoxied in there super tightly without any gaps anywhere.
Amazing video, thanks so much! Managed to use an old rotary grinder to disconnect the old battery and connect my new holder in place on my old Pentium Pro socket 8 motherboard, which should be a nice functional build now!
I have MB model ROCKY-3702EV with DS12C887 but the motherboard do not do nothing... i have two cuestions (1) if the DS12C887 do not have internal battery the integrated circuit will not work? / (2) in case of DS12C887 dosent work, this will afect the motherboard?, because i do not have inicial start and video (dead mother board)
Yes, I wanted to try it, because I have another project, where I'd need to get the IC out of the module. Unfortunately, I'm currently short on time, since I have to meet some deadlines at work.
Good video thanks for sharing 👍. Why not cut the pin on the IC beneath and connect it straight to new battery instead of drilling? Also why don't you sacrifice one of these modules do a full gut surgery to see what's inside ?
There are no pins underneath, hence the drilling. And I know, what's inside, pretty much the same stuff you can find on my own module: th-cam.com/video/svPNxILeQEw/w-d-xo.html
IT occurs to me that you can probably dremel from the TOP of the chip and reach these terminals.... disconnect the internal battery and solder on new leads WITHOUT desoldering the chip from the motherboard...... what say you?
Of course, as long as you hit the + pol of the battery, it would work. May be my last video about it would help to find the right spot: th-cam.com/video/ecTZtZhE9bI/w-d-xo.htmlsi=wiKnX63LcEvjVZbD
I have developed / contracted this ailment too. Why not just "jump" the terminals form somewahere else on the board ? I don't have the circuit diagram for my Board - indeed the downloaded Manual is very basic, but do we really need to go into the Chip at all ? Thanks for your contribution to this collection of vids.
Unfortunately we need, yes. We need to power the RTC chip which is inside of the module. This is an old video, but you can watch my video about a better solution, which I developed later. Search for nwX287 on my channel.
my motherboard has one of those installed but it also has battery holder markings on the pcb, a white circle with the - / - signs. Is it possible to attach an external battery in that point and leave the dallas rtc untouched?
@@necro_ware :( I knew it wasn't that simple :( Than I have to get one of your necroware neat replacement modules. But there is no way I can surface mount those millipede ICs... I hope someone can make them and sell them (I'm looking at you :P )
On ebay, they are selling 14 chips for $25 plus shipping. Plutao 63, buy them and use them. If they don't work, cut into them to figure out how to do the same thing? Don't forget to make a video of your results for youtube. www.ebay.com/itm/353621172414?hash=item525576e0be%3Ag%3ARy0AAOSwVV9hFYDO&LH_BIN=1
I would be more concerned with the consequences of reverse charging the stock cell with the new one rather than just a faster discharge. It is after all not designed to be recharged.
I don't think, that is a problem. The CR2032 is not powerful enough to recharge the internal battery. Anyway, if you are concerned, just cut the internal leads. Or use my replacement module, which I open sourced some time ago.
@@necro_ware, okey i made 1"hole" for +in the battery, and - From GND, and have some 0,5V, so i Connect normal 3V battery, and BIOS still have error, have some ideas? Peace!
@@wojtekpogromca7696 Try to save the BIOS settings once and reboot. If the error didn't gone, check your battery and the cables you soldered once again.
Very good and helpful information. There is another reason you should cut the internal battery pole: you are effectively charging the dead battery. This is very bad and may lead to them leaking over time.
If you notice the internal battery at 4:07, it's quite small and cannot possibly contain enough to significantly leak, especially not in the original well-sealed container. You might argue the side hole created for the connection is a potential weak point, but unless the PC is like the IBM 5155 Portable, I don't think it could ever be a problem.
@@squirlmy I take it you have never seen what happens when that type of cell is recharged. Also that cell shown is just a representation and not what is inside the Dallas module. they can explode at worst case and catch fire with a small trickle charge.
Few notes: I always disconnect the internal battery as it is non-rechargeable and isn't supposed to be charged. Also the battery might be degraded to a point where the current drain of it can be quite high. I would suggest you to use a micro (or nano) ampere meter to measure the current when the battery is disconnected or not.
Thanks from Germany. I just repaired a twenty years old oszilloscope. Now it works!
Great! Congratulations.
Достаточно хороших бокорезов и паяльника. Сделал по вашему видео - все заработало, спасибо! Теперь в моем zs-scorpion 256k работают часы! RESPECT!
This necroware RTC chip works great. I bought it on Amazon, soldered legs, put battery in, now I can boot my old 386 PC. Thank you!
Are they now sold on amazon too?
@@necro_ware I bought it on Amazon
Hi! I hope that everything is all right with you :). what a nice valid point that the internal bat. drains the CR2032 faster, I didn't think of that, I just do the mod using some salvage battery holders from mobos that are not working, they have a low profile and it is a nice way of reuse some parts before sending the mobos to the bin. Waiting for another video! Thank you for taking time to produce some very interesting videos. Be well my friend, regards from Portugal!
Hello Jorge! Nice to see you here again :) I am fine, thank you and hope you are all right too? I'm glad you liked it. The last video about this mod was obviously quite interesting for many people and there were some questions regarding the drain, so I decided to make an update. More videos will follow! Thank you for watching!
@Stigma Max That's exactly what he did. Did you even watch the video?
"it is a nice way of reuse some parts before sending the mobos to the bin" AAARGGH!!!!! There is no reason to EVER send these motherboards to the "bin"!!! At this point most are "vintage" and are collectible. There is certainly a market and many people collect these as DOS-gamers. Save it or sell it!
I also would cut the connection to the internal battery. As others mentioned, the current draw might be higher than in your case, also shouldn't be charged - yes. But, those modules are not only found on old mainboards used nowadays by hobbyists. They are also very common on industrial PCs, and they have been running since the late 90s. Having battery die one year after replacing it is gonna be problematic. If done properly, the industrial system, usually some CNC machine, can then work for many years without needing to have the battery replaced.
use ceramic tweezers when you pick up a battery! When they pick them up like this, they use up half the capacity just by placing them!
Ive done this to a lot of these modules to fix the computer board of vintage but spendy scientific instruments 🤓❤
Have you tried just attaching the ground wire to a ground on the motherboard, rather than on the chip?
Very clever. it worked a treat!!
I have one of these suckers on a nice later socket 7 board. The fecker is soldered with the battery side facing directly against some power MOSFETs with those branching black anodized aluminium flanges that were popular during the pentium era. There's no way to do it without desoldering it and even then bodge wire can't be thicker than a couple of mm.
But how the hell do you remember these things. Hug from Portugal
Excellent work
Best video about it. Is it the same with the Dallas DC12887A ? Thank you
Yes, you may be also interested in my other video on this topic: th-cam.com/video/svPNxILeQEw/w-d-xo.html
thankyou for these videos on the battery replacement - i just added the coin cell battery holder on a biostar 486 pci motherboard and it seems to have worked. i managed to set the hard drive size and reboot into ms dos so i assume it works as intended (this motherboard can't boot without bios settings). the moment I started packing it back up to install it into the case however, my bad soldering broke and my ground wire came off lol. lets see how i can get it fixed again tomorrow :)
Glad, I could help! Another oldie back to life, I guess?! ;)
Curse whoever put batteries INSIDE chips. They were thinking too much like Apple at the time.
Thank you it works great
I'd like to stress out how important is to solder the wire that goes to ground on the inward side.
I made the mistake of doing it on the outside and the solder joint broke, leaving me with a big ? :)
LOL
It was useful but you should pay attention to what's inside the socket as I have a couple boards with some IC, like with bios sockets.
Yes, it is indeed very much dependent from the environment, how to add the external battery in a best way. As I showed in the video, sometimes it is better to make it upright, sometimes you have so little space at the top, that it's better to add a battery using two cables and external holder from the side. Sometimes the ICs are sitting so tightly, that you don't even have space to add a drop of hot glue to better keep the cables in place. So, yes, you have to analyse, which way is the best, but at least the electrical part is always the same :)
Is there no way to fix this so that the battery last 10+ years, like the original module?
This fix will last 10+ years. It is literally just a change of internal battery.
A while back I went full metal jacket on one of these modules and cut out original battery. Left the original terminals for remote external battery. I do not recommend such a action generally but hey...
A true hacksaw and file job that!
a true hardware "hacker"!!!
hello, very good modifications and video. i have MB model ROCKY-3702EV with DS12C887 but the motherboard do not do nothing... i have two cuestions (1) if the DS12C887 do not have internal battery the integrated circuit will not work? / (2) in case of DS12C887 dosent work, this will afect the motherboard?, because i do not have inicial start (dead mother board)
The module should work even with an empty battery. So, if your mainboard doesn't start at all, either the module is dead, or your mainboard. The battery is only needed to keep the BIOS settings and the clock.
Hi, Citizens. At 2:05 you seem to work with a Dallas Ds12b887, I dont have the electric plan of this battery and you have not drilled a hole into this one, I suppose that your red wire is connected on the positive contact, so its ok if We have drilled a hole in the opposite side, between the two groups of 3 pins ! Otherwise, No matter of where is the hole into the negative or the positive contact of the inner battery both are a good place for the drill, is it exact ? Your external module has the negative and positive wires going unto the battery and are They soldered together in the same hole or They have into this a tiny seperation, 1 mm, 2 mm ? Thx for you time, if you got it ! Anyway thx for all your videos.
Very very interesting. Thanks!
You are welcome.
@@necro_ware Sorry, which pin number has the positive internal battery? I don't want to destroy the wrong one and my RTC has different pins cutted off. Thanks in advance. That's one is to bring an AW4416 alive back!
@@nelbazan8391 Hi! Please see at 1:09, if you mean that. Which model of the RTC module do you have? Usually the missing legs are always the same. If it doesn't look like the one I'm modifying in the video, may be this approach is not applicable to your module, so be careful. And if your module has really the same pinout and the pin 20 on your module is not missing, then you don't need to drill anything. Just try to solder + directly to the pin 20 and - to pin 16 or pin 12.
@@necro_ware Thanks for your prompt reply.
Mine is a sort kind of "pirated Dallas" as doesn't have the same quality as the original. I bought it little time ago but battery came empty so it's my test specimen XD. That's no problem with pin 20 as it was clear perfect with your explanation , the one I'm looking for is the internal cell coin to short it to avoid battery drainage.
Anyway I'll try to find out!
Thanks so much and stay safe!
@@nelbazan8391 thank you! I hope, I got you right. The pin 20 is the one where the + of the internal battery is going to. If you want to cut it, you have to drill from the side right above the pin 20. The metal part inside is the continuation of the pin 20, which goes to the internal battery. If you cut this metal you will disconnect the internal batteries + from the pin 20, where you can solder an external battery to.
I just did this today to a Dallas RTC battery in an old Gateway 2000 that I recently picked up. I didn't think it'd work but it does (although the bending back of the pins made them weak so they may break next time I remove the dallas module). I used a grinding bit on my drill (once you get past the plastic you'll grind thru the epoxy/glue stuff inside before you are greeted with the shiny contacts inside.) One thing though is will the battery inside the dallas module ever decide to leak and destroy the module's inside or even worse leak its stuff externally and onto the board?
From comments I've seen on other videos about this, the likelihood of this is low. Both due to battery chemistry not being the leaky kind, and the fact that it's epoxied in there super tightly without any gaps anywhere.
thank you
Amazing video, thanks so much! Managed to use an old rotary grinder to disconnect the old battery and connect my new holder in place on my old Pentium Pro socket 8 motherboard, which should be a nice functional build now!
I have MB model ROCKY-3702EV with DS12C887 but the motherboard do not do nothing... i have two cuestions (1) if the DS12C887 do not have internal battery the integrated circuit will not work? / (2) in case of DS12C887 dosent work, this will afect the motherboard?, because i do not have inicial start and video (dead mother board)
Awesome work am going to try this,can you do a video maybe using a heat gun to remove the ic from the Dallas case,maybe it can work..😊
Yes, I wanted to try it, because I have another project, where I'd need to get the IC out of the module. Unfortunately, I'm currently short on time, since I have to meet some deadlines at work.
Good video thanks for sharing 👍. Why not cut the pin on the IC beneath and connect it straight to new battery instead of drilling? Also why don't you sacrifice one of these modules do a full gut surgery to see what's inside ?
There are no pins underneath, hence the drilling. And I know, what's inside, pretty much the same stuff you can find on my own module: th-cam.com/video/svPNxILeQEw/w-d-xo.html
Yo! Did you know if Computer will work without this Chip, it wont turn on, or have some error?
It won't turn on. The RTC module is mandatory.
Soo i thing my RTC died, well... thats how retro works ;)
IT occurs to me that you can probably dremel from the TOP of the chip and reach these terminals.... disconnect the internal battery and solder on new leads WITHOUT desoldering the chip from the motherboard...... what say you?
Of course, as long as you hit the + pol of the battery, it would work. May be my last video about it would help to find the right spot: th-cam.com/video/ecTZtZhE9bI/w-d-xo.htmlsi=wiKnX63LcEvjVZbD
Very helpful
Thank you ! :)
I'm glad, I could help, thank you too.
I have developed / contracted this ailment too. Why not just "jump" the terminals form somewahere else on the board ? I don't have the circuit diagram for my Board - indeed the downloaded Manual is very basic, but do we really need to go into the Chip at all ? Thanks for your contribution to this collection of vids.
Unfortunately we need, yes. We need to power the RTC chip which is inside of the module. This is an old video, but you can watch my video about a better solution, which I developed later. Search for nwX287 on my channel.
@@necro_ware you're right - I'd forgotten about powering the internals when there are no thru' connection pins...
Thank you!
Helpful. Just did one on an Intergraph Interpro 2020
Then may be you are also interested in the module which I presented a month ago...
@@necro_ware I did have a look - nice little module. But I prefer to leave a piece of the original chip in place.
Thanks!
my motherboard has one of those installed but it also has battery holder markings on the pcb, a white circle with the - / - signs. Is it possible to attach an external battery in that point and leave the dallas rtc untouched?
No, you have then to replace the RTC module by a related IC and add a crystal. If you look around you will find a place, where a crystal is missing.
@@necro_ware :( I knew it wasn't that simple :(
Than I have to get one of your necroware neat replacement modules. But there is no way I can surface mount those millipede ICs... I hope someone can make them and sell them (I'm looking at you :P )
very good. but what would the procedure be like for the Dallas DS1220AB-200?
I have no idea, never had that ones in my hands yet, sorry.
On ebay, they are selling 14 chips for $25 plus shipping. Plutao 63, buy them and use them. If they don't work, cut into them to figure out how to do the same thing? Don't forget to make a video of your results for youtube. www.ebay.com/itm/353621172414?hash=item525576e0be%3Ag%3ARy0AAOSwVV9hFYDO&LH_BIN=1
I would be more concerned with the consequences of reverse charging the stock cell with the new one rather than just a faster discharge.
It is after all not designed to be recharged.
I don't think, that is a problem. The CR2032 is not powerful enough to recharge the internal battery. Anyway, if you are concerned, just cut the internal leads. Or use my replacement module, which I open sourced some time ago.
What do u apply in 2:00??
solder flux
Yo there mate, can i Just solider the battery, into right pinout? Will mobo run without module? Peace!
Unfortunately there is no pin where you could solder the battery to. That's why we need to drill it after all.
@@necro_ware, okey i made 1"hole" for +in the battery, and - From GND, and have some 0,5V, so i Connect normal 3V battery, and BIOS still have error, have some ideas? Peace!
@@wojtekpogromca7696 Which error do you get?
@@necro_ware CMOS failure, and CMOS battery error
@@wojtekpogromca7696 Try to save the BIOS settings once and reboot. If the error didn't gone, check your battery and the cables you soldered once again.
Good
Hi
Please help me
M48z08-100pc1
IT WORKED