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A 2S LiPo is 7.4V nominal. Measure your Slash 4×4 battery tray and hold-down before buying; a commonly cited envelope is 166 × 47.5 × 28 mm, but vehicle versions differ. Match the ESC connector. Traxxas iD integrates balance wiring; legacy packs have a separate balance lead. Connector or pack-count variants are not separate product picks.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Traxxas 2827X 2S 5000mAh 25C iD LiPo | $60–$75 | Amazon · eBay |
| 2 | Traxxas 2849X 2S 5800mAh 25C iD LiPo | $75–$90 | Amazon · eBay |
| 3 | Gens ace 2S 5000mAh 50C Hardcase LiPo | $30–$45 | Amazon · eBay |
| 4 | Zeee 2S 5200mAh 80C Hardcase LiPo | $25–$40 | Amazon · eBay |
| 5 | Ovonic 2S 5200mAh 50C Hardcase LiPo | $25–$40 | Amazon · eBay |
| 6 | Spektrum 2S 5000mAh 50C Smart Hardcase LiPo | $55–$75 | Amazon · eBay |
| 7 | CNHL 2S 5000mAh 100C Hardcase LiPo | $25–$40 | Amazon |
| 8 | SMC True Spec 2S 7200mAh Hardcase LiPo | $55–$75 | Amazon |
| 9 | ProTek RC 2S 5200mAh 50C Hardcase LiPo | $35–$50 | Amazon · eBay |
The picks, in detail
Traxxas 2827X 2S 5000mAh 25C iD LiPo
7.4V 2S 5000mAh 25C iD hardcase; verify tray dimensions.
- 7.4V 2S
- 5000mAh
- 25C
- Native iD
- Check tray
Traxxas 2849X 2S 5800mAh 25C iD LiPo
7.4V 2S 5800mAh 25C iD hardcase; verify hold-down clearance.
- 7.4V 2S
- 5800mAh
- 25C
- Native iD
- Check fit
Gens ace 2S 5000mAh 50C Hardcase LiPo
7.4V 2S 5000mAh 50C hardcase; buy the actual connector required.
- 7.4V 2S
- 5000mAh
- 50C
- Hardcase
- Connector check
Zeee 2S 5200mAh 80C Hardcase LiPo
7.4V 2S 5200mAh 80C hardcase stick pack; measure tray before purchase.
- 7.4V 2S
- 5200mAh
- 80C
- Hardcase
- Connector varies
Ovonic 2S 5200mAh 50C Hardcase LiPo
7.4V 2S 5200mAh 50C hardcase pack; confirm physical fit and connector.
- 7.4V 2S
- 5200mAh
- 50C
- Hardcase
- Tray check
Spektrum 2S 5000mAh 50C Smart Hardcase LiPo
7.4V 2S 5000mAh 50C Smart hardcase; IC connector is not native Traxxas iD.
- 7.4V 2S
- 5000mAh
- 50C
- Smart line
- Connector mismatch
CNHL 2S 5000mAh 100C Hardcase LiPo
7.4V 2S 5000mAh 100C hardcase; confirm published dimensions and connector.
- 7.4V 2S
- 5000mAh
- 100C
- Hardcase
- Tray check
SMC True Spec 2S 7200mAh Hardcase LiPo
Higher-capacity 7.4V 2S hardcase option; capacity does not waive fit checks.
- 7.4V 2S
- 7200mAh
- hardcase
- High capacity
- Measure carefully
ProTek RC 2S 5200mAh 50C Hardcase LiPo
7.4V 2S 5200mAh 50C hardcase; verify dimensions, connector and balance lead.
- 7.4V 2S
- 5200mAh
- 50C
- Hardcase
- Legacy wiring
Buying tips
- Measure tray length, width and height including hold-down.
- Match connector and balance system.
- Balance-charge in a LiPo-safe area and retire damaged packs.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.