16.8V 2A Lithium Battery Charger | 4S Li-ion / UAV | 5.5x2.5mm DC
16.8V 2A Lithium Battery Charger | 4S Li-ion / UAV | 5.5x2.5mm DC
Couldn't load pickup availability
Short Product Description
Short Product Description
This 16.8V 2.0A lithium battery charger is specifically designed to safely charge 4S (4-cell) Li-ion and Li-Po battery packs commonly used in UAVs, drones, and custom electronics. Featuring a versatile 5.5x2.5mm DC barrel plug that is fully compatible with 2.1mm sockets, it includes a clear LED indicator to monitor charging status. Please note that an IEC C7 (Figure-8) AC power cord is required and sold separately.
Key Features
Key Features
- Dedicated 4S Lithium Charging: Outputs exactly 16.8V to safely and fully charge 4-cell Li-ion and Li-Po battery packs.
- 2.0A Output Current: Provides a balanced 2-amp charge rate, ideal for maintaining battery health without excessive heat generation.
- Dual-Compatible DC Plug: The 5.5x2.5mm barrel connector is designed to fit both 2.5mm and 2.1mm center-positive jacks perfectly.
- Visual Charging Status: A simple LED indicator shows Red for charging and Green for fully charged.
- Global Voltage Input: Supports 100-240V AC input, making it safe to use internationally with the appropriate wall cable.
- Figure-8 AC Inlet: Utilizes a standard IEC C8 inlet, allowing you to use any standard C7 power cord of your preferred length.
Full Product Description
Full Product Description
Reliable Charging for 4S Lithium Battery Packs
This 16.8V 2A charger is precisely calibrated to safely charge 4-cell (4S) lithium-ion and lithium-polymer battery packs. Delivering a steady 2.0A output, it ensures your batteries are charged efficiently without overheating. Because 16.8V is the exact peak voltage required for a 4S lithium pack (4 x 4.2V), this power supply prevents overcharging and helps maintain the long-term health of your drone or robotics batteries.
Universal 5.5mm DC Connector and LED Indicator
The output cable features a standard 5.5x2.5mm barrel connector equipped with an internal spring clip, allowing it to fit securely into both 2.5mm and 2.1mm center-positive sockets. The built-in LED indicator takes the guesswork out of charging: it glows red while the battery is actively drawing power and turns green the moment your battery is fully charged and ready for use.
Technician Tip
This charger uses a standard IEC C8 power inlet, meaning it does not plug directly into the wall on its own. You will need an IEC C7 "Figure-8" power cable to operate it. If you do not already have a spare cable at home, you can easily add our 1.8m UK 3-Pin to IEC C7 Figure-8 Power Cable to your order, or pick one up directly at our physical store at Sun Cheong Computer Co. Ltd. in Sham Shui Po.
Technical Specifications
Technical Specifications
- Model: TP42-168200W
- Battery Compatibility: 4S (4-Cell) Lithium-ion / Lithium-Polymer
- Input Voltage: 100-240V AC ~ 1.5A Max, 50/60Hz
- Output Voltage: 16.8V DC
- Output Current: 2.0A
- DC Connector Size: 5.5mm (Outer Diameter) x 2.5mm (Inner Diameter) - Compatible with 2.1mm
- Polarity: Center Positive (+), Outer Negative (-)
- AC Inlet Type: IEC C8 (Requires C7 Figure-8 cable - Not Included)
- Indicators: Red (Charging) / Green (Fully Charged)
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
What type of batteries can this 16.8V charger be used for?
This charger is strictly designed for 4S (4-cell) lithium-ion or lithium-polymer battery packs. Because each lithium cell has a peak voltage of 4.2V, a 4-cell pack requires exactly 16.8V to reach a full charge.
Does this charger come with a wall power cable?
No, the AC power cable is not included in the package. You will need a standard IEC C7 (Figure-8) cable to connect the charger to a wall outlet, which can be purchased separately from our store.
Will the 5.5x2.5mm plug fit a 5.5x2.1mm socket?
Yes, the 5.5x2.5mm DC connector features an internal spring-clip design that securely grips both 2.5mm and 2.1mm center pins, ensuring a stable connection for either socket size.
How do I know when my battery is fully charged?
The built-in LED indicator glows red while the battery is actively charging and automatically turns green when the battery has reached its full 16.8V capacity.
Can I use this charger for a 12V lead-acid battery?
No, you should never use a 16.8V lithium charger for a 12V lead-acid battery. The voltage output and charging algorithms are completely different, and using this charger on a lead-acid battery could cause severe damage or safety hazards.
Target Users / Applications
Target Users / Applications
- UAV & Drone Builders: Charging custom 4S Li-Po battery packs used in FPV drones and aerial photography equipment.
- DIY Electronics Makers: Powering and charging 4S 18650 lithium-ion battery packs for custom portable speakers or robotics projects.
- RC Hobbyists: Safely charging 16.8V remote control car or boat battery packs.
- Portable Equipment Technicians: Replacing lost chargers for specialized 16.8V lithium-powered tools and lighting rigs.
