21–30 of 38 posts
The only thing worse than these soldered-in batteries are those motherboards with the Dallas DS1287 RTC “brick” ICs. They had a coin cell buried inside the chip[1] with no way to provide external power should it drain. [1]: http://www.mcamafia.de/mcapage0/dsrework.htm
Once while it was soldered into a mainboard :P
Why not use a 5F/5V supercapacitor, DGH505Q5R5 or anything alike ? You may need to solder a 10R current reducing resistor in series.
The only thing worse than these soldered-in batteries are those motherboards with the Dallas DS1287 RTC “brick” ICs. They had a coin cell buried inside the chip[1] with no way to provide external power should it drain. [1]: http://www.mcamafia.de/mcapage0/dsrework.htm
Necroware has a replacement design for Dallas RTCs: https://github.com/necroware/nwX287
Lots of older Apple hardware used soldered-in 1/2AA lithium batteries. You can replace them with a removable battery holder that was used on some later board versions. https://www.mouser.com/ProductDetail/Keystone-Electronics/10... https://www.mouser.com/ProductDetail/Keystone-Electronics/10...
The newer CR2032's have much lower mass and can withstand many more G's before it's an issue so they are usually in holders.
Why not use a 5F/5V supercapacitor, DGH505Q5R5 or anything alike ? You may need to solder a 10R current reducing resistor in series.
Lots of older Apple hardware used soldered-in 1/2AA lithium batteries. You can replace them with a removable battery holder that was used on some later board versions. https://www.mouser.com/ProductDetail/Keystone-Electronics/10... https://www.mouser.com/ProductDetail/Keystone-Electronics/10...
Just a note with those holders. They shouldn't be used in anything that will be shipped as the battery can get knocked out. The original shipped batteries were soldered in so they could be shipped safely. In fact a lot of the time the cells were taped or cable tied as well as soldered in on some bits of hardware! The newer CR2032's have much lower mass and can withstand many more G's before it's an issue so they are…
Most motherboards work with 3 to 4.5 volts. If a circuit doesn't charge, then it's a simple matter of using two or three AA or AAA batteries. If it does, we can use rechargeable batteries (I've a box of Ikea ones), or we can put a diode in line.
For instance, here's a replacement set for a Quadra 630 motherboard:
The only thing worse than these soldered-in batteries are those motherboards with the Dallas DS1287 RTC “brick” ICs. They had a coin cell buried inside the chip[1] with no way to provide external power should it drain. [1]: http://www.mcamafia.de/mcapage0/dsrework.htm
It's good to see this getting some attention. People should know that removing batteries and replacing them with something modern, particularly non-leaking modern, is a good thing. Most motherboards work with 3 to 4.5 volts. If a circuit doesn't charge, then it's a simple matter of using two or three AA or AAA batteries. If it does, we can use rechargeable batteries (I've a box of Ikea ones), or we can put a diode in…
