42V 2A XLR 4-pin Charger for 36V Kalkhoff Impulse Series
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๐Ÿ”‹ 42V 2A XLR 4-pin Charger for  36V Rockrider ST Riverside Decathlon B-Twin e-Bike

POWATECHNICโ„ข โ€“ Trusted UK Seller Since 2004 ๐Ÿ‡ฌ๐Ÿ‡ง
Dispatched from our Sheffield S9 2LQ facility | CE Certified

โœ… Product Specifications

  • Output Voltage: 42V
  • Output Current: 2.0A
  • Input Voltage: 100โ€“240V
  • Battery Type: 36V Lithium-Ion (Li-Ion)
  • Charging Plug: XLR 4-Pin Male Connector
  • LED Indicator: Red = Charging, Green = Fully Charged, Flashing Red = Charging Error โ€“ Battery may be an issue
  • Certifications: CE / RoHS / LVD / TUV
  • Warranty: 12-Month
๐Ÿ”Œ Compatibility & Plug Info

This charger fits only 36V Rockrider ST Riverside Decathlon B-Twin e-bikes including:

  • ST100
  • ST500
  • ST900
  • 100e
  • 500e

If your model is not listed, please contact us before ordering.

Main Charger Image XLR Connector

โš ๏ธ Important Reminder

Before placing your order, please check the following to avoid compatibility issues and unnecessary returns:

  • โœ… Your battery is 36V Lithium-Ion (Li-Ion)
  • โœ… Your battery socket accepts an XLR 4-pin male connector
  • โœ… Press the power/test button on your battery โ€” if no LEDs light up, the battery may be deeply discharged or faulty

If you're unsure, please contact us via WhatsApp with a clear photo of your battery socket and charger label.

โ“ Troubleshooting & FAQs

  • Q: Charger LED turns green but bike doesnโ€™t charge?
    A: Your battery may be fully charged, asleep, or BMS-locked.
  • Q: My battery is flat. Is the charger faulty?
    A: Not always. Battery issues are more common than charger faults.
  • Q: The LED is flashing red โ€“ is it faulty?
    A: Flashing red means a charging error. The battery may be too deeply discharged or have a fault.
  • Q: Do you accept returns?
    A: Yes. Returns accepted within 30 days. See below.

๐Ÿ“ฆ Whatโ€™s in the Box

  • 1 ร— 42V 2A Charger (XLR 4-pin)
  • 1 ร— Mains Cable (UK/EU/US plug based on delivery location)
  • 1 ร— User Leaflet 

๐Ÿ›’ How to Choose the Right Charger

  1. Check the voltage & current on your old charger label
  2. Match the exact connector profile, as many connectors look similar
  3. If unsure, send us a photo of your charging port

๐Ÿšš Shipping Information

  • UK Mainland: 2โ€“3 working days
  • Highlands, NI, Islands: 3โ€“5 days
  • EU/US/AUS: usually 7โ€“10 days
  • Click & Collect: Sheffield S9 2LQ (Monโ€“Fri, Sat by appointment)

๐Ÿ” Return Policy

We accept returns within 30 days if the product is unused and in original condition. For suspected faults, please contact us first. Buyer pays return postage unless the item is faulty.

๐Ÿข About Us

Powatechnic is a UK-based specialist in 12Vโ€“96V battery chargers for lithium, lead-acid, and VRLA batteries. We also supply 12V DC in-car chargers for scooters, golf buggies, and e-bikes โ€” ideal for car and motorhome users on the go. In addition, we provide expert battery diagnostics and limited refurbishment services to help recover โ€œdeadโ€ batteries whenever possible.

Our parent company, Firstlink Auto Parts Ltd, is based in Sheffield S9 2LQ and specialises in commercial vehicle brake components.