Navee ST3 and Navee ST3 PRO Fast Charger 48V - 53.6V / 54.6V 4A

Navee ST3 & Navee ST3 Pro Fast Charger – 48V (54.6V – 4A) – Navee Connector

Speed ​​up charging your Navee ST3 or Navee ST3 Pro electric scooter with this 54.6V – 4A fast charger featuring active ventilation . Designed for 48V (13S lithium-ion) batteries, it uses the original Navee connector to ensure perfect compatibility.

Compared to the original Navee charger, which is limited to 1.3A , this 4A fast charger offers a significant time saving : approximately 2 hours 30 minutes for a Navee ST3 (10.2Ah) and 3 hours 15 minutes for a Navee ST3 Pro (12.75Ah) . Active ventilation limits overheating and improves the charger's long-term reliability.

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🔧 Technical specifications

• Output voltage: 54.6V (maximum voltage for 48V – 13S Li-ion battery)
• Charging current: 4A (fast charging)
• Connector: Navee connector (ST3 / ST3 Pro)
• Charging time (indicative):
  • Navee ST3 (10.2Ah): ≈ 2h30
  • Navee ST3 Pro (12.75Ah): ≈ 3h15
• Case: ventilated plastic
• Compatible battery type: lithium-ion 48V (13S)
• Cooling: active via integrated ventilation
• Protections: overload, overvoltage, short circuit, reverse polarity, overheating
• LED indicator: red = charging / green = charging complete

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💡 Compatibility and connectivity

This fast charger is compatible with 48V Navee scooters equipped with the Navee connector :

• Navee ST3 – 48V / 10.2Ah battery
• Navee ST3 Pro – 48V / 12.75Ah battery

The precise calibration at 54.6V respects the chemistry of 48V (13S) lithium-ion batteries and ensures fast, stable and safe charging.

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📌 53.6V stock vs 54.6V: what Navee does and why it matters

On the Navee ST3 PRO , the original charger is often limited to 53.6V (instead of 54.6V). The manufacturer does this to prevent a fully charged scooter that has been stored for several days from remaining fully charged – which accelerates the wear and tear on the Li-ion cells. But in practice:

• Charging to 100% before driving poses no risk;
• At 53.6V, your 48V battery is never fully charged ;
• The BMS cannot properly balance the cells since it never reaches the actual end-of-charge voltage.

Consequence #1: Loss of useful capacity

A battery stopped at 53.6V is only using about 90–93% of its total capacity . Therefore, you'll start with a few fewer kilometers of range with each charge.

Consequence #2: progressive imbalance of cells

The BMS (Battery Management System) balances the cells only at high voltage, around 54.6 V. If the charge never goes that high, some cells drift: this causes, over time, sudden cut-offs , reduced autonomy or pack failures.

Why the 54.6V Source'IT is relevant

The Source'IT 54.6V – 2A charger reaches the nominal end-of-charge voltage, allowing:

• to recover 100% of the usable capacity ;
• to rebalance the cell pack via the BMS;
• to stabilize the battery over time and extend its life.

Tip: Charge to 100% just before riding. For long-term storage, leave the battery at around 30% to 60% .

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⚡ Why choose the Source'IT 4A fast charger for Navee?

The Source'IT 4A fast charger for Navee ST3 & ST3 Pro offers:

• Up to 3 times faster charging than the original 1.3A charger
• Active ventilation limits overheating
• Better durability than a passive charger
• Perfect compatibility with the Navee connector
• Comprehensive electronic protections
• Each charger is individually tested before shipping.
• Fast shipping within 24 to 48 hours

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🔒 Safety and reliability

Navee 48V batteries are compatible with 4A charging. Active ventilation maintains a controlled temperature, preventing the charger from overheating and ensuring reliable charging every day.

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❓ FAQ – Navee ST3 / ST3 Pro 48V (54.6V – 4A) fast charger

➡️ Is this charger compatible with the Navee ST3 or ST3 Pro?

Yes, it is specifically calibrated for 48V – 13S batteries and the Navee connector used on the ST3 and ST3 Pro.

➡️ Is the 4A fast charger risky?

No. Its precise calibration and active ventilation limit the charger's internal heating. Navee batteries are designed to withstand this charging current.

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📩 Assistance

Unsure about compatibility? 👉 Contact us: contact@source-it.fr

*Photos are not contractual – Source'IT, charger specialist for Navee ST3 & Navee ST3 Pro.