16.8V 2A Li-Ion Charger – Fully charge your 14.4V batteries safely and efficiently
Is your power tool battery not holding its charge like it used to? Often, the issue isn’t the cells themselves, but an inadequate charger that fails to complete the charging cycle correctly. This 16.8V 2A Li-Ion charger is precision-calibrated for 14.4V battery packs with 4 cells in series (4S), making it the perfect match for cordless drills, screwdrivers, portable vacuums, or any tool using a 14.4V Li-Ion battery system.
Note: Before purchasing, please ensure your battery is a 14.4V (4S) Li-Ion type and that your charging port is a 5.5 × 2.1 mm DC jack. This charger is not compatible with NiMH, NiCd, or LiFePO4 batteries.
Why choose this model? (Key Benefits):
- Precise 16.8V Output — Perfectly matches the full charge voltage of 4 Li-Ion cells (4 × 4.2V), ensuring each cell reaches its maximum capacity rather than stopping short.
- Optimised 2A Charging Current — Charges a 2Ah battery in approximately 1 hour and a 4Ah battery in about 2 hours, providing a steady charge without stressing the cells.
- Triple Integrated Protection — Built-in overvoltage, overload, and short-circuit protection automatically stops the charging process if an issue is detected, giving you total peace of mind.
- Clear LED Indicator — Red light indicates charging is in progress; green light signals that your battery is fully charged and ready to go.
- Universal Compatibility — Features a wide-range AC 100–240V, 50/60Hz input, making it suitable for use worldwide without the need for an external transformer.
- 90 cm Cable — Provides enough reach so you aren’t tethered directly to the wall outlet in your workshop or garage.
Performance and Technical Details
This charger utilises the CC/CV (Constant Current / Constant Voltage) charging method, which is the industry standard for 4S Li-Ion packs. In the initial phase, the charger maintains a constant 2A current; once the voltage reaches 16.8V, it automatically switches to the CV phase, tapering off the current to zero. The result is a full, balanced charge without the risk of overcharging. The 5.5 × 2.1 mm DC plug is the most common standard for DIY and commercial power tool packs, ensuring high compatibility — though we always recommend checking your specific device first.
| Parameter | Value / Detail |
|---|---|
| Input Voltage | AC 100–240V, 50/60Hz |
| Output Voltage | 16.8V DC |
| Output Current | 2A |
| Total Power | 33.6W |
| Compatible Battery Type | Li-Ion 14.4V (4S – 4 cells in series) |
| Compatible BMS | 4S BMS (18650 cells) |
| Charging Method | CC/CV (Constant Current / Constant Voltage) |
| Output Plug | DC 5.5 × 2.1 mm |
| Cable Length | 90 cm |
| Integrated Protection | Overvoltage, Overload, Short-circuit |
| LED Indicator | Red – Charging / Green – Fully Charged |
| Design | Compact and portable |
Package Contents
- 1 × 16.8V 2A Li-Ion Charger with 5.5 × 2.1 mm DC plug and 90 cm cable
Frequently Asked Questions
Is this compatible with my 14.4V drill battery?
If your battery is a 14.4V Li-Ion pack with a 5.5 × 2.1 mm DC charging port, then yes, it is compatible. Please verify the battery chemistry (Li-Ion only, not NiMH or LiFePO4) and the series configuration (4S) before connecting.
Can I use this for 12V or 18V batteries?
No. This charger is strictly calibrated for 14.4V (4S) Li-Ion batteries. Using it on a battery with a different nominal voltage can damage the cells and poses a significant safety risk.
How long does a full charge take?
It depends on your battery’s capacity. A 2Ah battery typically charges in 1–1.5 hours, while a 4Ah battery takes about 2–2.5 hours. With a 2A output, the calculation is simple: battery capacity (Ah) divided by 2.
Can I leave the battery connected after it is fully charged?
The built-in overvoltage protection automatically cuts the current once the battery reaches 16.8V. However, it is best practice to disconnect the battery once the LED turns green to help preserve the long-term health of your cells.
Does it work with different international power grids?
Yes. The AC 100–240V, 50/60Hz input makes it compatible with power grids worldwide. You will only need a local plug adapter; no voltage transformer is required.
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