Remote RTC/CMOS/NVRAM battery for retro computer motherboards. Provides about +4.5V. Which is what most vintage motherboards require. +3V, like from a CR2032, is not appropriate!
Features:
- Higher voltage than CR2032 and higher capacity for longer life
- Diode to prevent reverse charging
- 100ma fuse to protect motherboard if a short develops
- Nylon fuse holder contains fuse blast and glass
- Uses 1x4 pin headers found on most motherboards for simple cabling
- PCB cutouts for Cable tie to secure batteries in rough service situations
- Mounting holes for M3 standoffs
- No motherboard modifcations required!
Here's a scan from a 386sx AT motherboard. Notice the voltages it requires. It warns against using +3V batteries like a CR2032!
| Item | Qty | MFG Part Num | Mouser Part Num |
|---|---|---|---|
| Keystone 3xAAA Holder | 1 | 2479 | 534-2479 |
| 1N4148 Diode | 1 | 1N4148-T50R | 512-1N4148T50R |
| 1x4 2.54mm Male Header | 1 | 826926-4 | 571-826926-4 |
| Fuse | 1 | BK1/GMC-100-R | 504-BK1-GMC-100-R |
| Fuse Holder | 1 | 0PTF0078P | 576-0PTF0078P |
| Fuse Clip | 1 | 00BS0232P | 576-00BS0232P |
Dimensions:
Layers: 2
Finish: HASL
Make sure to choose "custom position" for order number /w JLCPCB or PCBWAY.
I sell assembled kits complete with cables, mounting hardware, and batteries in my eBay store.
And on Tindie (Cheaper on Tindie due to lower fees!) Link
