Key Features
- Universal AA/AAA Smart Charging: One charger for all of your AA and AAA rechargeables — auto-detects 1.5V li-ion and 1.2V NiMH cells across four independent slots and applies the right charging method to each one automatically.
- HD LCD Display: A proper HD LCD screen shows battery level bars and real-time charge status for all four slots at once — no guessing, no waiting to find out if a charge actually completed.
- Multi-Stage NiMH Refresh Mode: Quick Refresh and Smart Deep Refresh modes work to eliminate memory effect and restore real usable capacity to aging NiMH cells — not just fill them to whatever capacity they have left.
- Micro-Current Activation for Over-Discharged Batteries: The L4 Pro uses 200mA micro-current activation to bring back deeply over-discharged batteries at higher recovery rates — cells that most chargers would simply refuse to charge.
- Seven Built-In Safety Protections: Auto-stop, reverse polarity, over-current, over-voltage, over-charge, short-circuit protection, and over-discharged battery activation — all built in so you can charge with confidence and walk away.
Overview
The XTAR L4 Pro is where the standard L4 leaves off. It keeps the same four-slot USB-C convenience and wide 1.5V li-ion and 1.2V NiMH compatibility, then adds the features that actually matter when you are serious about your rechargeable batteries. The HD LCD display shows you exactly what is happening in each slot in real time. The multi-stage NiMH refresh system — Quick Refresh for everyday restoration and Smart Deep Refresh for more deeply degraded cells — eliminates memory effect and gets your NiMH batteries working like new again rather than just cycling through whatever capacity remains. The 200mA micro-current activation revives over-discharged cells that a standard charger would skip entirely. CVSA technology and four full-charge detection methods ensure precise, complete charging with lower heat across every session. Built with fireproof ABS+PC/V0 housing and weighing just 87g, it is compact enough to keep anywhere. Compatible with a wide range of 1.5V li-ion and 1.2V NiMH brands including XTAR, Eneloop, Energizer, EBL, and Duracell.
Applications / Uses
- Charging XTAR 1.5V li-ion AA and AAA batteries and compatible third-party 1.5V li-ion cells
- Charging 1.2V NiMH batteries from XTAR, Eneloop, Energizer, EBL, Duracell, and other compatible brands
- Refreshing degraded NiMH batteries to restore real usable capacity and eliminate memory effect
- Recovering deeply over-discharged AA and AAA cells that standard chargers cannot activate
- Home, travel, and everyday use from any standard USB-C 5V 2A power source
Specifications
| Brand: | XTAR |
| Model: | L4 Pro |
| Compatible Battery Size: | AA / AAA |
| Compatible Battery Type: | 1.5V Li-ion and 1.2V Ni-MH |
| Number of Slots: | 4 |
| Power Input: | DC 5V 2A, USB-C port |
| Charging Current: | 0.5A x 1 / 0.5A x 4 (independent per slot) |
| Activation Current: | 200+/-50mA |
| Charging Cutoff (Li-ion): | N/A, 100mA or less |
| Charging Cutoff (NiMH): | 1.45+/-0.1V, N/A |
| Display: | HD LCD with battery level bar indicators |
| NiMH Refresh Mode: | Quick Refresh and Smart Deep Refresh |
| Over-Discharged Battery Recovery: | Yes — micro-current activation |
| Housing Material: | Fireproof ABS+PC/V0 |
| Safety Features: | Over-discharged battery activation, auto-stop after full charge, reverse polarity, over-current, over-voltage, over-charge, short-circuit protection |
| Operating Temperature: | 0°C to 40°C |
| Storage Temperature: | -10°C to 60°C |
| Dimensions: | 80mm (L) x 102mm (W) x 27.5mm (H) |
| Weight: | 87g |
| 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.
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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).
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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.
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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.
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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.
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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.
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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
IMR Batteries 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.