. . EXPERT CHARGER 15 is an electronic charger for charging 12 volt batteries: WET (liquid-acid) GEL (gel) MF (maintenance-free) AGM (with fiberglass mat) EFB (for vehicles with Start-Stop) CAL (calcium) LFP (lithium-iron-phosphate)The device is equipped with safety features : thermal against spark formation on pole terminals against pole short circuit overload and reverse polarity.Specially designed housing allows the charger to be mounted on the wall which will save valuable space in the garage or workshop.BALANCES OF THE DEVICE Maintenance-free device Voltage 12V Charging 25A 9-stage charging process Charging resumption after voltage drop on battery IP 44 protection. . . . . . Microprocessor control system provides automatic charging process. When the required voltage is reached on the battery, it enters the backup status and automatically resumes charging when the voltage on the battery drops.EXPERT CHARGER 15 has 4 charging modes : STD - WET and MF acid liquid batteries AGM - AGM, gel, EFB batteries CAL - calcium batteries LiFePO4 - lithium iron phosphate (LFP)Specification Power supply voltage: 230 VPower: 380 WProtection rating: IP 44Weight: 2.1 kgSize dimensions L x W x H: 240x130x65 mmPackaging dimensions L x W x H: 318x171x120 mmCharging voltage: 12 VCharging current: 25AName battery capacity Ah 15h (min/max): 10 - 500 Ah. . . . . Charging Process9-stage charging process ensures that optimal battery charging conditions are achieved. The automatic control system will adjust each of the 9 charging stages to properly charge the battery:ETAP 1 - DIAGNOSTIC (Diagnostic) - analyzes the battery and checks if it can accept the charging current; prevents charging a damaged battery.ETAP 2 - RECOVERY CHARGE - low-voltage batteries are pre-charged with a low current but increased voltage; highly discharged batteries can be restored to a usable state and this ensures longer battery life, the step is skipped if the battery is minimally discharged and in good condition.ETAP 3 - SOFT START - the charger gradually increases the charging current until the set charging current is reached.ETAP 4 - PULSE CHARGE (PULSE CHARGE) - the battery is charged with a pulse current (pulse fluctuations take place in the DC current range).ETAP 5 - RECONDITIONING - preparatory stage for charging in the bulk charge stage.ETAP 6 - BULK CHARGE - charging with a constant current up to a pre-set voltage (14.4÷14.7V).ETAP 7 - ABSORPTION CHARGE - when the required battery charge is reached, the change to constant voltage (CV) charging will occur and the charging process will end.ETAP 8 - EVALUATION DIAGNOSTIC - automatically monitors the battery voltage after charging is completed.ETAP 9 - MAINTENANCE CHARGE - a stage that maintains the battery (float) and monitors its condition; resumes charging with reduced current if necessary. . . PROJECTOR OPERATIONAfter properly connecting the terminals to the battery and plugging the power plug into the mains, the "POWER" LED will light up at startup, the charger will then enter STANDBY modeThe only physical "MODE" button is used for movement - Each time the "MODE" button is pressed once, the "charging program" will be changed"The available "charging programs" are as follows: - STD acid liquid batteries, MF- AGM batteries, gel batteries, EFB- CAL calcium batteries- LiFePO4 lithium iron phosphate batteries (LFP)After selecting the appropriate function, the charger will switch to "CHARGING" status. - The entire battery charging process is automatic and does not require user intervention (except for unplugging the cables)After the charging process is completed, the "FULL" LED will light up, indicating a charged batteryIf the battery is still plugged into the charger after charging is complete, If the "FAULT" LED illuminates, the charger will stop the charging process or will not start it at all: incorrect connection of the rectifier terminals, reverse polarity, short circuit, or exceeding the operating temperature limit. . . . . . The charging cables are 2 meters long and are equipped with an ambient temperature sensor. Its function is to adjust the appropriate voltage during charging, with respect to the ambient temperature. Only for STD, AGM and CAL modes..