Zavedení
This manual provides detailed instructions for the safe and efficient operation of your COSOOS MiBOXER C4 Smart Universal 4-Bay Battery Charger. Please read this manual thoroughly before use and retain it for future reference.

Image: The COSOOS MiBOXER C4 Smart Universal 4-Bay Battery Charger, showing its LCD display, four battery slots, and power cables.
Bezpečnostní informace
- Read the user guide completely before operating the charger.
- Nepokoušejte se nabíjet nedobíjecí baterie.
- Ensure correct battery polarity when inserting batteries. Incorrect insertion can cause damage to the charger or battery.
- Nevystavujte nabíječku vodě nebo extrémním teplotám.
- Udržujte nabíječku mimo dosah dětí a domácích zvířat.
- Use only the provided power cord or a compatible DC 12V 2A power source.
- The charger is designed with fire-retardant materials and features excellent heat dissipation.
- If the charger displays an error or a battery appears damaged, discontinue use immediately.
Komponenty produktu
Balíček obsahuje:
- 1 x COSOOS MiBOXER C4 Smart Universal 4-Bay Battery Charger
- 1 x napájecí kabel (AC 90-260 V)
- 1 x Uživatelská příručka
Note: Batteries and car charging cable are not included.
Nastavení
- Připojte napájení: Plug the provided power cord into the AC input port on the back of the charger, then connect it to a standard wall outlet (AC 90-260V). Alternatively, for DC input, connect a compatible DC 12V 2A power source (e.g., car adapter, not included) to the DC input port.
- Zapnutí: The LCD display will illuminate, indicating the charger is ready for use.

Image: Close-up of the MiBOXER C4 charger showing the DC 12V and AC 86-265V input ports, along with a detailed view of the LCD display and internal resistance measurement.
Návod k obsluze
The MiBOXER C4 charger features four independent charging bays, allowing simultaneous charging of different battery types and sizes.
1. Vložení baterií
- Carefully insert one or more rechargeable batteries into the charging slots (C1, C2, C3, C4), ensuring correct polarity (+ and - ends match the markings on the charger).
- The charger's thick negative pole slide track ensures secure contact for various battery sizes.

Image: The MiBOXER C4 charger with various battery types and sizes inserted, demonstrating its wide compatibility.
2. Automatic and Manual Battery Type Detection
- The charger will automatically detect Li-ion (4.2V) and Ni-MH/Ni-Cd (1.48V) battery types.
- For Li-ion (4.35V) and LiFePO4 (3.6V) batteries, you must manually select the battery type.
- Stiskněte tlačítko SLOT button to select the desired charging bay.
- Stiskněte tlačítko MODE button to cycle through the battery types (Li-ion 4.35V, LiFePO4 3.6V).
- The selected battery type will be displayed on the LCD.
3. Pochopení LCD displeje
The large LCD provides comprehensive information for each charging slot:
- Typ baterie: Displays the detected or manually selected battery chemistry (e.g., Li-ion 4.2V, Ni-MH).
- svtage: Aktuální svtage baterie.
- Proud: Nabíjecí proud v Amperes (A).
- Doba nabíjení: Trvání aktuálního nabíjecího cyklu.
- Kapacita baterie: Accumulated mAh charged into the battery.
- Vnitřní odpor: Displays the internal resistance of the battery in mΩ.
- Procenta baterietage: Odhadovaná úroveň nabití.
- Symbol nabíjení: Indikuje aktivní nabíjení.

Obrázek: Podrobný view of the MiBOXER C4's LCD screen, highlighting and labeling each piece of information displayed, such as battery type, percentage, charging time, capacity, internal resistance, and voltage.
4. Nastavení nabíjecího proudu
- The charger can automatically select an optimal charging current.
- To manually adjust the charging current (up to 1.5A max per channel):
- Stiskněte tlačítko SLOT button to select the desired charging bay.
- Stiskněte a podržte MODE button to enter current adjustment mode.
- Stiskněte tlačítko MODE button repeatedly to cycle through available current options (e.g., 0.1A, 0.3A, 0.5A, 0.7A, 1.0A, 1.5A).
- Uvolněte MODE tlačítko pro potvrzení výběru.
5. Discharge Function (Slot 4 Only)
The 4th charging bay (C4) has a discharge function to measure the real capacity of a battery.
- Insert the battery into slot C4.
- Stiskněte tlačítko SLOT button until C4 is selected.
- Stiskněte a podržte MODE button to cycle through modes until "DISCHARGE" or a similar indicator appears.
- The charger will discharge the battery and then recharge it, displaying the measured capacity. This process can take several hours.
6. Automatic Charging Completion
The charger will automatically stop charging when batteries are fully charged, preventing overcharging and extending battery life. The display will show "FULL" for the respective slot.

Image: The MiBOXER C4 charger displaying an error for incorrect battery insertion and showing "FULL" when a battery is completely charged.
Kompatibilita baterie
The MiBOXER C4 charger is compatible with a wide range of cylindrical rechargeable batteries:
| Typ baterie | Jmenovitý svtage | Kompatibilní velikosti |
|---|---|---|
| Li-ion / IMR / INR / ICR | 4.2V / 4.35V | 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650 |
| LiFePO4 | 3.6V | (Same sizes as Li-ion, manual selection required) |
| Ni-MH / Ni-Cd | 1.48V | AA, AAA, AAAA, C, SC |

Image: The MiBOXER C4 charger illustrating its full compatibility with various battery types and sizes, including Li-ion, LiFePO4, Ni-MH, and Ni-Cd cells.
Údržba
- Čištění: Před čištěním odpojte nabíječku od napájení. K otření povrchu použijte měkký, suchý hadřík. Nepoužívejte abrazivní čisticí prostředky ani rozpouštědla.
- Skladování: Pokud nabíječku nepoužíváte, skladujte ji na chladném a suchém místě mimo dosah přímého slunečního záření a vlhkosti.
- Inspekce: Periodically inspect the power cord and charger for any signs of damage. If damage is found, discontinue use and contact support.
Odstraňování problémů
- Nabíječka se nezapíná:
- Ensure the power cord is securely connected to both the charger and a working power outlet.
- Zkontrolujte, zda je elektrická zásuvka funkční.
- "ERR" Displayed:
- This indicates a battery error. Check if the battery is inserted with correct polarity.
- The battery might be short-circuited or damaged. Remove the battery and inspect it.
- If a damaged battery is detected, the charger will stop charging.
- Baterie se nenabíjí:
- Ensure the battery is properly seated in the slot and making good contact.
- Verify the battery type is correctly detected or manually selected, especially for Li-ion 4.35V and LiFePO4.
- The battery might be over-discharged. The charger has a function to activate some over-discharged lithium batteries.
- Difficulty with Button Operations:
- Refer to the "Operating Instructions" section for specific button press sequences (short press, long press) for SLOT a MODE tlačítka.
Specifikace
| Funkce | Detail |
|---|---|
| Model | MiBOXER C4 |
| Vstupní objemtage | Střídavé napětí 90–260 V, stejnosměrné napětí 12 V 2 A |
| Výstupní objemtage | 4.35V / 4.2V / 3.6V / 1.48V |
| Maximální nabíjecí proud | 1.5A na kanál |
| Počet zálivů | 4 Independent Bays |
| Zobrazit | LCD s podsvícením |
| Rozměry (D x Š x V) | 6.3 x 4.1 x 1.6 palce (160 x 104 x 41 mm) |
| Hmotnost | 13.3 unce (377 gramů) |
| Materiál | PC Fire-retardant material |
| Ochrany | Reverse polarity, short circuit, overcharge, damaged battery detection |
Záruka a podpora
The COSOOS MiBOXER C4 Smart Universal 4-Bay Battery Charger comes with a 36-month warranty from the date of purchase, covering manufacturing defects.
For technical support, warranty claims, or any questions regarding your product, please contact COSOOS customer service through the retailer where the product was purchased or visit the official COSOOS webstránky pro kontaktní informace.
Please have your purchase receipt and product model number (C4) ready when contacting support.