Half-AA Battery Holder

One of my Apple IIGSes needed a new battery. (I think it's been through at least two over the past 30+ years.) It's a ROM 01, which means the original battery had a couple wires sticking out the ends that were soldered to the motherboard. A previous replacement involved clipping the original out and replacing it with a battery with coiled wiring that would slip over the stubs still attached to the motherboard. I decided to go with the approach Apple took with the ROM 3 IIGS: a half-AA battery holder to allow easy replacement when needed. (Also, half-AA 3.6V lithium batteries are still readily available in 2019...picked one up at Fry's over the weekend. The original, hard-wired type? Not so much.)

The source thing didn't include a half-AA holder, so I took the code for the AA holder and modified it:

```
module flexbatterHalfAA(n=1){
flexbatter(n=n,l=26.1,d=14.4,hf=0.80,shd=2.5,el=0.5,eps=0.28);
}
```

It took two tries to get the length right and to dial in the s