Navee ST3 PRO electric scooter charger – 48V (54.6V) – 2A – Ventilated, stable and safe charging

54.6V – 2A charger specially designed for the Navee ST3 PRO , equipped with a 48V (13S) lithium-ion battery . Thanks to its active ventilation , it guarantees a reliable, stable charge without overheating . It is compatible with all Navee ST3 PRO batteries, whether marked 53.6V or 54.6V , and complies with European safety requirements ( CE ).

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🔧 Technical specifications

• Output voltage: 54.6 V DC (end of charge voltage of a 13S pack – 4.2 V/cell)
• Charging current: 2 A
• Compatible battery: Navee ST3 PRO – 48 V (13S Li-ion)
• Connectivity: Navee ST3 PRO
• Cooling: active ventilation
• LED indicator: red = charging / green = end of charge
• Protections: overvoltage, overheating, overload, short circuit, polarity reversal
• Standards: CE compliant – electrical safety and EMC

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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 53.6 V (instead of 54.6 V). The manufacturer does this to prevent a scooter charged to 100% and stored for several days from remaining full – which accelerates the wear of the Li-ion cells. But in practice:

• Charging to 100% before riding is safe;
• At 53.6V, your 48V battery is never completely full ;
• The BMS cannot balance the cells properly since it never reaches the actual end-of-charge voltage.

Consequence No. 1: loss of useful capacity

A battery stopped at 53.6V only uses about 90–93% of its total capacity , so you'll get a few less miles of range with each charge.

Consequence No. 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 rises this high, some cells drift: this causes, over time, sudden cuts , reduced autonomy or pack failures.

Why the 54.6 V Source'IT is relevant

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

• to recover 100% of useful 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 extended storage, keep the battery around 30% to 60% .

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💨 Performance and benefits

• Charges 70% faster than the original charger (1.3A);
• Active cooling : prevents overheating, extends the life of the charger;
• Electronic regulation : stable voltage and constant current;
• Gentle charging preserving Li-ion chemistry;
• CE certification and individual testing before shipment.

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❓ FAQ – Navee ST3 PRO (48V – 54.6V 2A)

➡️ Does 54.6V damage the battery?

No. 54.6V is the normal full-charge voltage for a 13S pack. This is the only value that allows for full BMS balancing and optimal capacity. What damages a battery is storing it at 100% or 0%, not fully charging it before use.

➡️ Can I alternate my original 53.6V charger and the 54.6V Source'IT?

Yes. Do at least one full charge to 54.6V every 2-3 weeks to allow the BMS to balance . After the light turns green, leave the charger connected for another 30-60 minutes.

➡️ Is 2A current sufficient?

Yes. 2A is a standard charge, but it's still 70% faster than the original charger. It doesn't heat up your battery cells at all.

➡️ How long does it take to recharge a Navee ST3 PRO?

For a 12.5 Ah battery, allow approximately 6 to 6.5 hours. The last 30 minutes are often spent balancing the cells by the BMS.

➡️ Should I unplug as soon as the LED turns green?

Not immediately: The green LED indicates the end of the main charge, but the BMS continues internal balancing. Leaving it connected for an additional 30 to 60 minutes optimizes cell alignment and preserves battery life.

➡️ Can I use this charger with another Navee?

This model is optimized for the Navee ST3 PRO . It can work with other 48V (13S) models with the same connectors and features, but not with 36V (42V) scooters.

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📦 Delivery & Warranty

• Fast shipping within 24 to 48 hours from France
• 2-year warranty – each charger is tested before shipping
• Compatibility support: contact@source-it.fr

*Non-contractual photos – Source'IT.