Universal battery adapter

Universal Battery Adapter Sleeve
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- Use chamfered edges
- Easy to adapt
- Fast render

### 2024-10-14 added module battery_extender:

Create 4 mm extension for 18650:
> battery_extender(dim_18650, 4);


### Parameters module battery_extender:
- dim = battery type
- length = extention length
- chamfer = chamfer size
- slot = slot size

Create tapered sleeve for 18650 to 26650A:
> battery_convert(dim_18650, dim_26650A);


###Parameters module battery_convert:

- dim_source = source battery type
- dim_target = target battery type
- chamfer = chamfer size, will be capped to 1/3 of sleeve thickness, or undef if none, default = 3*layer_height
- height_scale = default = .9 use 1 if you need height equal to the height of the smallest
- clearing default layer_height



have fun