# RC LiPo battery sizes: ROAR 2S hardcase, shorty, saddle, 4S brick; drone 4S / 6S and 3S 2200 packs; connectors

> What size is a 2S hardcase LiPo?

- Category: Electronics › RC & drones
- Kind: Modern device
- Basis: ROAR rule text (as quoted by RC press), maker spec pages (Gens Ace, Spektrum, Traxxas via dealer, Reedy, CNHL, Tattu)
- Page: https://xemstudio.com/objects/rc-lipo-batteries/ · JSON: https://xemstudio.com/api/geometry?object=rc-lipo-batteries · Plain text: https://xemstudio.com/objects/rc-lipo-batteries/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- ROAR (racing) limits: standard 2S hardcase 139 (+0/−3) × 47 (+0/−2) × 25.1 (+0/−3) mm; saddle packs 25.1 max height; 4S brick 165 × 52 × 52 max. Most bashing packs follow the same envelope.
- Shorty 2S: about 94–97 × 47 × 20–24.5. Saddle: about 67 × 47 × 25 per side. Traxxas iD 2S 5000: 137 × 43 × 24.
- Drone packs (XT60): 4S 1300 77 × 38.5 × 27; 4S 1550 79 × 39 × 28; 6S 1100 75 × 39.5 × 35; plane 3S 2200 106 × 34 × 24.
- Connectors seen: 5 mm / 4 mm bullets (racing), IC5 (Spektrum Smart), Traxxas iD, XT60 (drones and planes), XT90 / EC5 on larger packs. Leave 1 mm a side in trays for the soft case swelling.

## Sizes

| pack | length_mm | width_mm | height_mm | weight_g | connector |
|---|---|---|---|---|---|
| ROAR 2S hardcase (max) | 139 | 47 | 25.1 | None | None |
| Gens Ace Redline 2S 5000 hardcase | 139 | 47 | 18.5 | 224 | 5 mm bullet |
| Spektrum Smart 2S 5000 hardcase | 139.7 | 46 | 25.1 | 400 | IC5 |
| Traxxas iD 2S 5000 | 137 | 43 | 24 | 281 | Traxxas iD |
| Gens Ace Redline 2.0 shorty 2S 5000 | 97 | 47 | 20 | 179 | 5 mm bullet |
| Reedy WolfPack shorty 3800 | 94 | 47 | 24.5 | 207 | 4 mm |
| Reedy saddle 4800 (per side) | 67 | 47 | 25 | 277 | 4 mm |
| Tattu R-Line V3 4S 1300 | 77 | 38.5 | 27 | 150 | XT60 |
| CNHL 4S 1550 120C | 79 | 39 | 28 | 166 | XT60 |
| CNHL Black 6S 1100 | 75 | 39.5 | 35 | 211 | XT60 |
| CNHL Black 3S 2200 | 106 | 34 | 24 | 180 | XT60 |
| ROAR 4S brick (max) | 165 | 52 | 52 | None | None |

## Where the files are

- RC Car Action (ROAR rule text): [ROAR LiPo size rule](https://www.rccaraction.com/?p=204548) — web — Publisher's page; dimensions are facts
- LiveRC: [ROAR saddle pack rule](https://www.liverc.com/news/roar-rules-news-saddle-packs-and-sct-tires/) — web — Publisher's page; dimensions are facts
- Gens Ace: [Redline 2S 5000 hardcase](https://www.gensace.de/gens-ace-redline-series-5000mah-7-4v-140c-2s1p-hardcase-hv-lipo-battery-pack-with-hardcase-56.html) — web — Publisher's page; dimensions are facts
- ARRMA (Spektrum spec): [Smart 2S 5000 hardcase](https://www.arrma-rc.com/fr/product/7.4v-5000mah-2s-50c-smart-hardcase-lipo-battery-ic5/SPMX50002S50H5.html) — web — Publisher's page; dimensions are facts
- OzRC (Traxxas spec): [Traxxas iD 2S 5000](https://ozrc.com.au/products/t-xas-5000mah-7-4v-2-cell-25c-lipo-battery) — web — Publisher's page; dimensions are facts
- CompetitionX: [Reedy WolfPack shorty and saddle](https://www.competitionx.com/news-feed/reedy-wolfpack-shorty-saddle-lipo-batteries) — web — Publisher's page; dimensions are facts
- Rotorama (CNHL spec): [CNHL 4S 1550](https://www.rotorama.com/product/cnhl-1550mah-4s-120c) — web — Publisher's page; dimensions are facts
- Unmanned Tech (CNHL spec): [CNHL Black 6S 1100](https://www.unmannedtechshop.co.uk/product/cnhl-black-series-1100mah-22-2v-6s-100c-lipo-battery/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (4 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/rc-lipo-batteries/index.json

- lipo-2s-hardcase-roar-139x47x25.1: [STEP](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-2s-hardcase-roar-139x47x25.1.step) · [STL](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-2s-hardcase-roar-139x47x25.1.stl) — 2S hardcase LiPo, ROAR maximum 139 × 47 × 25.1
- lipo-2s-shorty-97x47x20: [STEP](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-2s-shorty-97x47x20.step) · [STL](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-2s-shorty-97x47x20.stl) — 2S shorty (Gens Ace Redline 2.0) 97 × 47 × 20
- lipo-4s-1550-79x39x28: [STEP](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-4s-1550-79x39x28.step) · [STL](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-4s-1550-79x39x28.stl) — 4S 1550 drone pack (CNHL) 79 × 39 × 28
- lipo-tray-2s-hardcase: [STEP](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-tray-2s-hardcase.step) · [STL](https://xemstudio.com/files/hardware/rc-lipo-batteries/lipo-tray-2s-hardcase.stl) — Tray for a 2S hardcase pack (inside 140 × 48), strap slots

## Questions

**What size is a 2S hardcase LiPo?**

Up to 139 × 47 × 25.1 mm (ROAR); most standard packs match.

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