Key Features
- Universal AA/AAA Compatibility: Charges both 1.5V lithium-ion and 1.2V Ni-MH AA and AAA batteries simultaneously across all four slots, with support for mixed battery types and multiple brands in a single charge session.
- 4 x 0.5A Independent Channel Charging: Each of the four slots delivers 0.5A of independent charging current, completing a full charge of four XTAR 1.5V AA 4150mWh batteries in approximately 2.9 hours and four 1.2V AA 2500mAh NiMH batteries in approximately 6 hours.
- Auto Battery Detection with Optimized Charging: Automatically detects battery type and chemistry upon insertion, selecting the appropriate charging strategy — TC-CC-CV for 1.5V li-ion cells and XTAR's unique control technology for 1.2V NiMH — for faster charging, precise cut-off, and lower battery temperatures.
- Six Built-In Safety Protections: Comprehensive safety circuit includes reverse polarity protection, over-current protection, over-voltage protection, over-charge protection, short-circuit protection, dry battery detection, and overtime charging protection.
- Over-Discharged Battery Revival & LED Status Indicators: Capable of reviving over-discharged batteries, with per-slot LED indicators providing real-time charge status visibility throughout the charging cycle.
Overview
The XTAR L4 is a four-channel AA/AAA battery charger engineered to handle both 1.5V lithium-ion and 1.2V Ni-MH rechargeable batteries in a single compact unit. Powered via USB-C at 5V 2A, the L4 delivers 0.5A of independent charging current to each of its four slots simultaneously, automatically detecting battery type and selecting the optimal charging algorithm upon insertion. For 1.5V li-ion batteries, the L4 employs the TC-CC-CV charging method; for 1.2V NiMH batteries, it uses XTAR's proprietary control technology — both delivering faster charge times, precise termination, and reduced heat generation compared to conventional charging approaches. The L4 can also revive over-discharged batteries, and its hollow-out design aids heat dissipation and makes battery removal straightforward. Six integrated safety protections provide comprehensive coverage across all charge conditions. The package includes the L4 charger, a USB-A to USB-C cable, and a user manual.
Applications / Uses
- Charging XTAR 1.5V li-ion AA and AAA rechargeable batteries including the AA 4150mWh, AA CLR 4300, AA LR 3000, and AAA 1620mWh series
- Charging standard 1.2V Ni-MH AA and AAA rechargeable batteries from XTAR and other compatible brands
- Mixed chemistry charging sessions — 1.5V li-ion and 1.2V NiMH cells simultaneously across four independent slots
- Reviving over-discharged AA and AAA batteries that standard chargers may fail to recognize or charge
- Home, office, and field use powered by any standard USB-C 5V 2A power source
Specifications
| Brand: | XTAR |
| Model: | L4 |
| Supported Battery Types: | 1.5V Li-ion AA/AAA and 1.2V Ni-MH AA/AAA |
| Number of Slots: | 4 |
| Power Input: | 5V 2A, USB-C port |
| Charging Current: | 0.5A x 4 (independent per slot) |
| Termination Current: | 100mA or less |
| Charging Time (Li-ion): | ~2.9 hrs for 4 x XTAR 1.5V AA 4150mWh |
| Charging Time (NiMH): | ~6 hrs for 4 x XTAR 1.2V AA 2500mAh |
| Charging Method (Li-ion): | TC-CC-CV |
| Charging Method (NiMH): | XTAR unique control technology |
| Auto Battery Detection: | Yes |
| Over-Discharged Battery Revival: | Yes |
| LED Indicators: | Yes — per slot charge status |
| Safety Features: | Reverse polarity, over-current, over-voltage, over-charge, short-circuit, dry battery detection, overtime charging protection |
| Operating Temperature: | 0°C to 40°C |
| Dimensions: | 76mm (L) x 76.5mm (W) x 27.6mm (H) |
| Weight: | 51g |
| Package Contents: | L4 charger, USB-A to USB-C cable, user manual |
| User Manual: | View User Manual |
⚠ Important Safety Warnings
Improper use of a battery charger can result in overcharging, short circuits, or damage to the battery, causing FIRE, EXPLOSION, or ELECTRICAL SHOCK. Users must follow all safety guidelines to ensure proper operation. Click here to review the full safety guidelines.
-
Device Compatibility:
- Use the charger only for compatible battery types and sizes as specified by the charger manufacturer. Ensure the charger is appropriate for the battery chemistry, size, and protection status (e.g., unprotected or protected cells).
- Do not charge non-rechargeable batteries (e.g., alkaline or primary cells).
-
Proper Use:
- Only charge batteries in a fireproof or non-flammable area. Avoid charging on beds, couches, or other flammable surfaces.
- Do not force a battery into the charger slot if it does not fit properly. This can damage the charger or battery and may result in unsafe charging conditions.
- Inspect batteries before charging: Do not charge if the battery casing, wrapper, or terminals are damaged, dented, leaking, or bulging.
- Never leave batteries unattended while charging. Monitor the charging process, and unplug the charger when charging is complete.
- Avoid exposing the charger to liquids, high heat, or direct sunlight.
-
Inspection:
- Do not use the charger if the power cord, plug, or device is damaged.
- Inspect both the charger and the battery for any signs of damage before use.
-
Storage & Handling:
- Keep the charger away from children and pets.
- When not in use, unplug the charger and store it in a cool, dry place.
-
Prohibited Activities:
- Do not modify or disassemble the charger.
- Do not attempt to repair a damaged charger—replace it with a new one.
- Avoid using extension cords or adapters that exceed the manufacturer’s recommendations.
-
Emergency Response:
- If the charger or battery emits smoke, sparks, or a burning smell, disconnect the power immediately and move the battery and charger to a safe area.
- In case of fire, use a Class D fire extinguisher or sand to extinguish the flames.
Disclaimer
18650Battery.com is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Battery chargers must only be used with compatible battery types and operated in accordance with manufacturer instructions. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to their customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.