AT-3015 charger is designed to charge batteries 12 and 24 up to 250 Ah. This charger can charge batteries both passenger cars and trucks. Freight vehicles batteries are most commonly used on the 24V. Control panel device maximally informative and understandable. It hosts two toggle switches, a dial gauge of the charging current and two fuses. Features: - High quality ERE assembly - Reliable design - completely metal casing protects the device from damage. - There is a fuse for short circuit protection. How do I charge the battery? Charging must be done with the removed battery from the vehicle. Switch "more-less" set to "Less". Switch "12V - 24V" to select the position corresponding to the battery voltage. With the help of terminals to connect the charger to the battery with the correct polarity. Connecting the battery charger to a power supply of 230 V. The gauge shows a charger charging current. Depending on the condition of the battery and the manufacturer's recommended charging current of batteries, set the switch "more-less" to the desired position. When the battery is fully charged, the indicator needle will be near zero. Store charger must be indoors at a minimum humidity and at ambient temperature of from -10 ° C air + 30 ° C. For prolonged storage charger with an ambient temperature of less than -10 ° C before turning on the device allow it to warm indoor heat at least 1 hr. We strongly recommend that you, before you start to work, read the instruction manual!