As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.
The X-Maxx’s 8S power system is built from two 4S packs wired in series through the included series harness – Traxxas doesn’t sell a single-pack 8S battery for it. Every pack below is a real 4S LiPo meant to be bought and run as a matched pair.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | CNHL Racing Series 9500mAh 14.8V 4S 90C (EC5) | $90-$120 per pack (buy two for 8S) | Amazon |
| 2 | Traxxas 2890X 6700mAh 14.8V 4S 25C | $150-$180 per pack (buy two for 8S) | Amazon · eBay |
| 3 | Gens ace 8500mAh 14.8V 50C 4S (XT60) | $90-$110 per pack (buy two for 8S) | Amazon · eBay |
| 4 | CNHL 6200mAh 14.8V 4S 90C | $60-$80 per pack (buy two for 8S) | Amazon · eBay |
| 5 | CNHL 5200mAh 14.8V 4S 90C | $50-$65 per pack (buy two for 8S) | Amazon |
| 6 | Zeee 4S LiPo 9000mAh 14.8V 100C (EC5) | $85-$110 per pack (buy two for 8S) | Amazon · eBay |
The picks, in detail
CNHL Racing Series 9500mAh 14.8V 4S 90C (EC5)
A high-capacity 4S pack frequently recommended in pairs for serious X-Maxx bashing, known for holding voltage under hard throttle.
- 4S 14.8V, 9500mAh, 90C
- EC5 connector
- Hard case
- Large capacity gives long runtime even under heavy bashing
- High 90C rating supports the X-Maxx’s power draw
- Large, heavy pack – running two adds meaningful weight to the truck
Traxxas 2890X 6700mAh 14.8V 4S 25C
Traxxas’s own 4S pack, sized and connectored for a plug-and-play fit – run two in series for the X-Maxx’s stock 8S configuration.
- 4S 14.8V, 6700mAh, 25C
- Traxxas iD connector
- Traxxas warranty and support
- No adapter or connector swap needed
- Consistent, tested performance and durability from the OEM
- Lower C-rating and smaller capacity than the aftermarket high-power options
Gens ace 8500mAh 14.8V 50C 4S (XT60)
A high-discharge 4S pack with a genuine 50C true rating, positioned as delivering strong acceleration for X-Maxx-class trucks.
- 4S 14.8V, 8500mAh, 50C
- XT60 connector
- Hard case
- True 50C rating (not just a burst rating) supports hard acceleration
- Well-known, widely stocked brand
- XT60 needs an adapter or connector swap for the stock X-Maxx wiring
CNHL 6200mAh 14.8V 4S 90C
A mid-range CNHL pack balancing weight, capacity and power – a lighter alternative to the 9500mAh pack above for owners who prioritize handling over max runtime.
- 4S 14.8V, 6200mAh, 90C
- Lighter than the 9500mAh pack
- Hard case
- Noticeably lighter than the 9500mAh option, improving handling
- Same 90C discharge rating as CNHL’s larger pack
- Shorter runtime than the 9500mAh pack
CNHL 5200mAh 14.8V 4S 90C
CNHL’s lightest, most budget-friendly 4S pack in this lineup – a sensible entry point for owners trying 8S for the first time before committing to bigger packs.
- 4S 14.8V, 5200mAh, 90C
- Lightest and cheapest CNHL option here
- Hard case
- Lowest cost way to get to a matched 8S pair
- Lighter weight for tighter handling
- Shortest runtime of the packs on this list
Zeee 4S LiPo 9000mAh 14.8V 100C (EC5)
A high-capacity, high-discharge Zeee pack explicitly sold as compatible with the X-Maxx, with metal-plated terminals for a firmer connector fit.
- 4S 14.8V, 9000mAh, 100C
- EC5 connector with metal plates
- Marketed specifically for Xmaxx-class RC trucks
- Explicitly marketed for X-Maxx compatibility, not just generic RC use
- High 100C rating for hard acceleration
- Among the heavier packs here when running two in series
Buying tips
- The X-Maxx doesn’t take a single 8S pack – it runs two matched 4S packs wired in series through the included series harness. Always buy two of the same pack (same brand, capacity, and C-rating) rather than mixing packs.
- Match capacity and age between the two packs in your pair – mismatched packs discharge unevenly and can over-stress the weaker one.
- A higher C-rating (CNHL/Zeee 90-100C) supports harder acceleration, but weight goes up with capacity – the 5200-6200mAh CNHL packs handle noticeably lighter than the 8500-9500mAh options.
- Only the Traxxas 2890X uses the stock iD connector – every third-party pack here needs an adapter or a connector swap to plug into the X-Maxx’s wiring.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.