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Specialized Specialized Rockhopper 36V Joycube Charger: Precision 42V 2A Li-Ion Charging System
The Specialized Specialized Rockhopper 36V Joycube Charger is an engineered solution providing a reliable 42V 2A Constant Current/Constant Voltage (CC/CV) charge for 36V Li-Ion battery systems. Its robust 2-stage algorithm ensures optimal battery health and longevity, prioritizing safety through comprehensive electrical protection features and passive thermal management.
Quick Answer
This Specialized Rockhopper charger provides an ideal 42V 2A CC/CV charge profile specifically tailored for 36V Joycube/Phylion Li-Ion battery packs, ensuring efficient and safe power delivery via an SV 5-Pin proprietary connector.
✓Precision 2-Stage CC/CV Charging Algorithm optimized for 36V Li-Ion Battery Systems (6Ah-15Ah)
✓Integrated Multi-Layered Electrical Protection, including Over-Voltage, Over-Current, Short-Circuit, and Over-Temperature Safeguards
✓Compact, Fan-less Design with CE, TUV GS, CB, and RoHS Certifications for Global Reliability and Silent Operation
Own a Specialized Rockhopper with the Joycube or Phylion battery system? This 42V 2A charger is your go-to for a reliable, certified power source. Its unique SV 5-pin round plug is non-negotiable for compatibility, ensuring you won't damage your e-MTB's electronics with generic alternatives. It’s compact at 750g and safety-tested with TUV GS and CB marks. Buy this if you need a dependable OEM replacement to maintain battery health. Avoid if your Specialized uses the Brose motor system, as the proprietary connectors won't match.
✓ Who Should Buy
- •Owners of Specialized Rockhopper E-Bikes equipped with 36V Joycube or Phylion Li-Ion battery systems requiring a primary or secondary charging unit.
- •Individuals seeking a reliable, CE, TUV GS, CB, and RoHS certified 42V 2A replacement or spare charger for 36V Li-Ion batteries that utilize an SV 5-Pin round proprietary plug.
- •Users prioritizing passive cooling, a compact brick design, and comprehensive electrical protection for indoor charging of 6Ah-15Ah Li-Ion E-bike batteries.
✕ Who Should Avoid
- •Users with E-bikes requiring a different nominal battery voltage (e.g., 24V, 48V) or different battery chemistry (e.g., Lead-Acid, NiMH), as this charger is exclusively for 36V Li-Ion.
- •Those needing advanced smart connectivity features (e.g., Bluetooth/Wi-Fi, mobile app control), adjustable charging current, or a charger with universal battery compatibility beyond Joycube/Phylion systems.
- •Individuals seeking ultra-fast-charging capabilities, as this 2A unit provides standard charging times suitable for optimal battery longevity rather than speed.
Product Overview
The Specialized Specialized Rockhopper 36V Joycube Charger is a dedicated 84W power supply engineered for the specific demands of Electric Mountain Bike (E-MTB) battery systems, particularly those utilizing 36V Joycube or Phylion Li-Ion battery packs found in Specialized Rockhopper models. Operating across a universal 100V-240V AC input at 50/60 Hz, this charger delivers a stable 42V DC output at 2A, utilizing a proprietary SV 5-Pin Round connector for secure and precise integration. Its compact brick form factor (170mm x 85mm, 750g) and passive cooling design ensure silent operation and portability, making it ideally suited for indoor charging environments. An intuitive LED status display provides clear, real-time feedback on the charging process (Red: Charging, Green: Complete), while its non-adjustable output parameters uphold the integrity of the specified Li-Ion charging protocol. This charger is specifically designed for 36V nominal Li-Ion batteries with capacities ranging from 6Ah to 15Ah (216Wh to 540Wh).
| Brand | Specialized |
| Model Number | Specialized Rockhopper 36V Joycube Charger |
| Type | E-Bike Battery Charger |
| Application Sector | Electric Mountain Bike (Rockhopper, Joycube / Phylion Battery Systems) |
| Country Of Origin | China |
| Launch Year | NA |
| Color | Black |
| Enclosure Type | Compact Brick |
| Standard Compliance | CE, TUV GS, CB, RoHS |
| Certifications | CE, TUV GS, CB, RoHS |
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Engineering Analysis
The core of the Specialized Specialized Rockhopper 36V Joycube Charger's operation is its sophisticated 2-stage Constant Current/Constant Voltage (CC/CV) charging algorithm, meticulously optimized for 36V nominal Li-Ion battery chemistry. The initial Constant Current stage delivers a steady 2A to rapidly charge the battery until it reaches its maximum terminal voltage of 42V DC. Subsequently, the charger transitions to the Constant Voltage stage, where the voltage is precisely held at 42V while the current gradually tapers down to zero. This precisely controlled current reduction prevents overcharging and thermal runaway, extending battery cycle life and ensuring a target 100% State of Charge (SOC) without the need for equalization or trickle charging, which are generally not required for Li-Ion chemistries.
Electrically, the charger accepts a wide input voltage range (100V - 240V AC, 50/60 Hz single phase) via a standard country-specific AC plug and a 1.5m cable, facilitating global compatibility. Its fixed 42V DC output and 2A current are delivered via a robust 1.2m output cable terminating in a proprietary SV 5-Pin round connector, specifically chosen for its secure fit and reliable electrical contact with Joycube/Phylion battery systems. The rated power output is 84W.
Safety is paramount, with multiple integrated protection features embedded in its design. This includes comprehensive over-voltage protection (OVP) and under-voltage protection (UVP) to safeguard against input power fluctuations, along with critical over-current protection (OCP) and short-circuit protection (SCP) on the output, which prevents damage to both the charger and the battery in the event of a fault condition. Over-temperature protection ensures thermal stability during operation. The unit employs a passive cooling method, entirely fan-less, which contributes significantly to its quiet operation and enhances long-term reliability by eliminating moving mechanical parts and minimizing potential dust ingress. Electrical isolation further enhances user safety by preventing direct electrical contact between the AC input and DC output stages. Compliance with CE, TUV GS, CB, and RoHS standards underscores its adherence to stringent international safety and environmental regulations, confirming its suitability for indoor portable use.
Technical Support & FAQs
Engineering Analysis
The core of the Specialized Specialized Rockhopper 36V Joycube Charger's operation is its sophisticated 2-stage Constant Current/Constant Voltage (CC/CV) charging algorithm, meticulously optimized for 36V nominal Li-Ion battery chemistry. The initial Constant Current stage delivers a steady 2A to rapidly charge the battery until it reaches its maximum terminal voltage of 42V DC. Subsequently, the charger transitions to the Constant Voltage stage, where the voltage is precisely held at 42V while the current gradually tapers down to zero. This precisely controlled current reduction prevents overcharging and thermal runaway, extending battery cycle life and ensuring a target 100% State of Charge (SOC) without the need for equalization or trickle charging, which are generally not required for Li-Ion chemistries.
Electrically, the charger accepts a wide input voltage range (100V - 240V AC, 50/60 Hz single phase) via a standard country-specific AC plug and a 1.5m cable, facilitating global compatibility. Its fixed 42V DC output and 2A current are delivered via a robust 1.2m output cable terminating in a proprietary SV 5-Pin round connector, specifically chosen for its secure fit and reliable electrical contact with Joycube/Phylion battery systems. The rated power output is 84W.
Safety is paramount, with multiple integrated protection features embedded in its design. This includes comprehensive over-voltage protection (OVP) and under-voltage protection (UVP) to safeguard against input power fluctuations, along with critical over-current protection (OCP) and short-circuit protection (SCP) on the output, which prevents damage to both the charger and the battery in the event of a fault condition. Over-temperature protection ensures thermal stability during operation. The unit employs a passive cooling method, entirely fan-less, which contributes significantly to its quiet operation and enhances long-term reliability by eliminating moving mechanical parts and minimizing potential dust ingress. Electrical isolation further enhances user safety by preventing direct electrical contact between the AC input and DC output stages. Compliance with CE, TUV GS, CB, and RoHS standards underscores its adherence to stringent international safety and environmental regulations, confirming its suitability for indoor portable use.