The Traxxas Slash 2WD is available in brushed and brushless versions, both with a battery tray size of 165 x 49.5 x 25 mm (L x W x H). Next, a few replacement batteries will be recommended, which are the best in terms of running time, discharge power and budget.
Longest Run Time Battery
HOOVO 7200mAh 2S 100C 7.4V Lipo Battery with Traxxas Connector
Brand: HOOVO
Voltage: 7.4V
Capacity: 7200mAh
Discharge Rate: 100C
Connector: TR Plug & EC5
Size: 139mm x 47mm x 25mm
Weight: 330g
Highlight: Large Capacity | High C-rate
Both the Slash 2WD Brushless and Brushed models are compatible with this 2S LiPo battery. The best thing about this battery is that it offers 7200mAh, which beats all the competition in terms of running time. In addition, the 100C provides enough input power for the 2wd Slash’s brushless power system. You can enjoy easy drifting and kick up dust with improved acceleration. In addition, this battery comes in a HARD CASE package that is both durable and waterproof.
Best Budget Battery
Nihewo 6500mAh 2S 90C 7.4V Lipo with Traxxas Connector
Brand: Nihewo
Voltage: 7.4V
Capacity: 6500mAh
Discharge Rate: 90C
Connector: Traxxas and EC5 Connector
Size: 139 x 47 x 25 mm
Weight: 304g
Highlight: Budget | Long Run Time | High C-rate | Durable
The 90C packs deliver great punchout performance for my Slash and last through long speed runs. After over six months of use, the cells are still balanced with a minimal voltage gap. The size is perfect for several of my Traxxas vehicles, making them not just a well replacement for the stock batteries but an upgrade. Overall, these packs are underrated in performance and others.
Best NIMH Battery
Venom 5000mAh 7.2V 6-Cell NiMH Battery with Connector Adapter
Brand: Venom Power
Voltage: 7.2V (6S)
Capacity: 5000mAh
Connector: XT60 with Connector Adapter
Size: 137mm x 45mm x 23.9mm
Weight: 436g
Highlight: Durable | High C-rate | Stable | Long Battery Life
Compared to other NIMH batteries, this battery has a thicker discharge wire that can handle higher currents and can consistently provide high power to the motor, which has been proven in actual use. Additionally, although it comes with an XT60 connector, it includes three different adapters suitable for other RC cars, including a TRX Female to XT60 Male Connector Adapter, making it compatible with the Slash.
