WOLFBOX BC40 4A Smart Battery Charger for 6V/12V Batteries, 10-Stage Charging
Product description
The WOLFBOX BC40 combines automatic charging with battery maintenance, so one charger can help keep a vehicle battery ready for regular use or storage.
Its 10-stage charging program adapts to battery condition, while Pulse Recovery is designed to help reduce sulfation buildup. Float Mode helps maintain a full charge.
An LCD shows battery voltage, charging status, progress, and the selected mode. That makes it easier to track charging than with a basic maintainer that offers fewer on-screen details.
Key specifications
- Type: 4A smart battery charger and maintainer
- Compatibility: 6V and 12V lead-acid batteries, 12V LiFePO₄ batteries
- Supported lead-acid types: WET, AGM, GEL, SLA, VRLA, and flooded
- Battery capacity: 4Ah–120Ah
- Input voltage: 110V
- Charging features: 10-stage charging, Pulse Recovery, Float Mode, and Recond Mode
- Display: LCD with battery voltage, charging status, progress, and selected mode
- Included connections: Battery clamps and O-type terminal wire
Requirements
The BC40 uses a 110V input and supports 6V and 12V lead-acid batteries, as well as 12V LiFePO₄ batteries with a capacity of 4Ah–120Ah. Match the selected mode to the battery: the charger offers 6V STD, RECOND, and SUPPLY modes. To access these options, disconnect the charger from the battery, then press and hold the Mode button for 3–5 seconds.
For a parked car, motorcycle, boat, or lawn mower, connect the charger to the battery and select the appropriate mode to monitor charging on the LCD. The included clamps and O-type terminal wire provide two connection options for different battery setups. Its memory function resumes the previous charging mode after a power interruption, helping maintain a consistent setup.
Who it’s for
The BC40 suits owners who maintain batteries across several types of vehicles or equipment, rather than buying a charger for one battery chemistry alone. It supports common lead-acid formats alongside 12V LiFePO₄, making it useful for cars, motorcycles, ATVs, lawn mowers, boats, SUVs, and more. It also offers more than basic charge maintenance: the display provides live battery information, and Recond Mode is intended to help recover deeply discharged 12V batteries. The charger supports batteries with voltage as low as 1V.
Before you decide
Which batteries can the BC40 charge? It supports 6V and 12V lead-acid batteries, including WET, AGM, GEL, SLA, VRLA, and flooded types, plus 12V LiFePO₄ batteries. The stated capacity range is 4Ah–120Ah.
What does the LCD show? It displays battery voltage, charging status, charging progress, and the selected mode, so you can follow the charging process at a glance.
How do I select RECOND or SUPPLY mode? With the charger disconnected from the battery, press and hold the Mode button for 3–5 seconds to access 6V STD, RECOND, and SUPPLY modes. Recond Mode is for helping recover deeply discharged 12V batteries.
Buying verdict
Choose the WOLFBOX BC40 if you want one compact 4A charger for supported 6V and 12V battery care, with the added flexibility of LiFePO₄ compatibility, automatic maintenance, and clear LCD monitoring. Its combination of charging, maintenance, and dedicated modes makes it a practical fit for keeping vehicle and equipment batteries cared for between uses.