3d CAD model for a battery height spacer to allow installing a shorter group 94R battery in place of a taller 24F or 27F one.
- 94R is widely available as an AGM battery and much more affordable compared to 27F.
- In terms of capacity, it is a significant upgrade over 24F and comes close to 27F. It usually provides the lowest cost per capacity.
- It has the same size footprint as 27F and therefore fits in the battery compartment of the 4th-gen Toyota 4Runner (N210/N215).
- It has quite a bit less height (see below for details). This requires bending back the tiny 90° tab on the body ground connector to allow rotating it downwards and securing the clamp to the terminal.
- It has a narrower top with a gap for the folding handles. This is somewhat incompatible with the narrow factory steel hold-down bar.
This spacer provides a longer, sufficiently wide bed for a flat hold-down bar intended for a 24F or 27F battery. The goal is to reduce movement and strain on the battery case.
- 3d model complete.
- Prototype printed using ABS filament with scale factor on printer set to 108% and installed (see photo).
- Group 24F (65Ah): 282 168 229
- Group 27F (92Ah): 318 173 227
- Group 94R (H7/L4) (80Ah): 315 175 190
- 121 mm battery width upper
- 12 mm wide and 5 mm deep gap for folding handles across width of battery
- 25 mm step height between outer and inner top of battery
- 45 mm width
- 8 mm height center
- 12 mm height ends
- 175 mm inside length; spacer needs to fit in there lengthwise
175
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* 121 *
* 45 *
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- ImplicitCAD for programmatic CAD modeling
- MeshLab for 3d mesh rendering
- Cura LulzBot Edition for printing