RC LiPo battery sizes: ROAR 2S hardcase, shorty, saddle, 4S brick; drone 4S / 6S and 3S 2200 packs; connectors — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/rc-lipo-batteries/  (CC BY 4.0)
Basis: ROAR rule text (as quoted by RC press), maker spec pages (Gens Ace, Spektrum, Traxxas via dealer, Reedy, CNHL, Tattu)
Catalog version: 2026-10-20

Sizes: see table below
- 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.

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

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

Free files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/rc-lipo-batteries/index.json
API: https://xemstudio.com/api/geometry?object=rc-lipo-batteries