Yokomo YOKRPB-39E2K RPX Racing Performer Ultra 2S 3900mAh 100C StickPack  [YOKRPB-39E2K]

Yokomo RPB-39E2K - RPX Racing Performer Ultra Series Plastic StickPack 7.4v 3900mAh 100C
Price:
AUD$107.34
Brand:
Yokomo
Model:
YOKRPB-39E2K
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2S 100C StickPack Optimized for Tight Bays

The Yokomo RPX Racing Performer Ultra YOKRPB-39E2K is a 7.4V 3900mAh 100C StickPack LiPo targeted at 1/10 touring and drift chassis where space is limited but power demands are high. The pack is housed in a plastic stickpack shell and fitted with a 5mm positive connector specified for series 5000/6000 to support solid electrical contact and to help avoid reverse polarity errors during assembly.

Dimensional details for fitment checks: Size: 92.5mm x 46.5mm x 18.4mm and Weight: 161g. The thin stick shape and connector orientation are suitable for compact battery trays, while the 100C rating shows the pack is intended for setups requiring high discharge performance.

Fit and charging advice: orient the 5mm positive connector to match your vehicle harness, confirm balance lead access and fasten the pack securely. Always charge with a compatible balance charger and follow standard LiPo safety protocols.

Product Specifications

  • Item: RPX Racing Performer Ultra StickPack
  • Material: Plastic stickpack shell
  • Model Number: YOKRPB-39E2K
  • Compatibility: RC car use, 2S voltage configurations
  • Voltage: 7.4V
  • Capacity: 3900mAh
  • Discharge Rating: 100C
  • Connector: 5mm positive connector for series 5000/6000
  • Dimensions: 92.5mm x 46.5mm x 18.4mm
  • Weight: 161g

A compact, high-discharge StickPack choice for drivers balancing minimal profile with strong current capability in 2S configurations.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

What performance changes should I expect vs a lower C pack?

Higher C-rated packs typically show less voltage sag under load, delivering firmer throttle response during acceleration. Expect more consistent voltage under heavy draws compared with lower C cells.

How do I care for the 5mm connector to keep good contact?

Keep the connector clean and free of debris, periodically inspect for wear, and ensure secure mating. Replace connectors if you notice corrosion or poor contact.

Are there ESCs or motors this pack does not suit?

The pack is intended for 2S systems; while it supports high current draw, ensure your ESC and motor are rated for the expected peak currents. Check ESC and motor specifications rather than assuming compatibility.

What mounting tips help prevent movement in the chassis?

Use the correct size Velcro or straps, verify balance lead routing does not pull on the pack, and add light foam shims if needed to stop lateral movement without stressing the shell.

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