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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? · Modern device · basis: ROAR rule text (as quoted by RC press), maker spec pages (Gens Ace, Spektrum, Traxxas via dealer, Reedy, CNHL, Tattu)
Also called: 2s hardcase lipo dimensions, shorty lipo size, 4s 1500 lipo dimensions, rc battery tray 3d print, roar battery size
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 12 in table
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.
RC LiPo battery sizes: ROAR 2S hardcase, shorty, saddle, 4S brick… size chart
| 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
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| RC Car Action (ROAR rule text) | ROAR LiPo size rule | web | Publisher's page; dimensions are facts |
| LiveRC | ROAR saddle pack rule | web | Publisher's page; dimensions are facts |
| Gens Ace | Redline 2S 5000 hardcase | web | Publisher's page; dimensions are facts |
| ARRMA (Spektrum spec) | Smart 2S 5000 hardcase | web | Publisher's page; dimensions are facts |
| OzRC (Traxxas spec) | Traxxas iD 2S 5000 | web | Publisher's page; dimensions are facts |
| CompetitionX | Reedy WolfPack shorty and saddle | web | Publisher's page; dimensions are facts |
| Rotorama (CNHL spec) | CNHL 4S 1550 | web | Publisher's page; dimensions are facts |
| Unmanned Tech (CNHL spec) | CNHL Black 6S 1100 | web | Publisher's page; dimensions are facts |
Free files
★ Free files 4 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| lipo-2s-hardcase-roar-139x47x25.1 | 2S hardcase LiPo, ROAR maximum 139 × 47 × 25.1 | STEP · STL |
| lipo-2s-shorty-97x47x20 | 2S shorty (Gens Ace Redline 2.0) 97 × 47 × 20 | STEP · STL |
| lipo-4s-1550-79x39x28 | 4S 1550 drone pack (CNHL) 79 × 39 × 28 | STEP · STL |
| lipo-tray-2s-hardcase | Tray for a 2S hardcase pack (inside 140 × 48), strap slots | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=rc-lipo-batteries

Fits with
Questions
What size is a 2S hardcase LiPo?
Up to 139 × 47 × 25.1 mm (ROAR); most standard packs match.


