Yokomo YOKRPB-39E2K RPX Racing Performer Ultra 7.4V 3900mAh 100C StickPack LiPo for RC Cars  [YOKRPB-39E2K]

Yokomo RPB-39E2K - RPX Racing Performer Ultra Series Plastic StickPack 7.4v 3900mAh 100C
Price:
£55.47
Brand:
Yokomo
Model:
YOKRPB-39E2K
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StickPack LiPo Built for Competitive Touring and Drift

The Yokomo RPX Racing Performer Ultra YOKRPB-39E2K is a 7.4V 3900mAh 100C StickPack LiPo developed for 1/10-scale touring and drift chassis where space-saving packaging and steady output are priorities. It uses a plastic stickpack shell and a 5mm positive connector specified for series 5000/6000 to aid firm electrical contact and to reduce the chance of incorrect polarity during connection.

Confirm physical dimensions for fitment: Size: 92.5mm x 46.5mm x 18.4mm and Weight: 161g. The stick profile and connector layout make the pack appropriate for tight battery bays, and the 100C discharge rating reflects a focus on high current capability for demanding motor and ESC combinations.

Installation guidance: align the 5mm positive connector with your vehicle harness, ensure the balance lead is reachable, and secure the pack in place. Charge only with a compatible balance charger and follow recommended LiPo handling practices to maintain safety.

Specification Details

  • 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

This StickPack is a compact, high-discharge solution for competitive 2S setups where fitment and power delivery are both critical.
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 charge current should I select for safe routine charging?

For everyday charging, set your balance charger to around 1C of the pack capacity; for a 3900mAh pack that is roughly 3.9A. Higher currents shorten charge time but increase stress on cells, so adjust according to your needs.

How should the pack be secured to avoid connector strain?

Make sure the pack sits flush in the tray, use suitable fastening like Velcro or straps, and route the connector and balance lead so they are not under tension when the chassis is closed.

What does the 100C rating mean for current draw?

The C-rating multiplied by capacity gives a theoretical maximum continuous current. For a 3900mAh pack, 100C suggests a high continuous capability, but actual safe current depends on system components and thermal limits.

Any specific precautions before first use?

Inspect the pack and connectors for shipping damage, confirm the balance lead and main connector are intact, charge the pack slowly for the first cycle while monitoring temperature, and verify polarity before connecting to electronics.

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