Rectifier for charging 12/24V batteries. Specifications: purpose: charging lead-acid, lithium, lithium iron phosphate, gel, AGM batteries power supply: AC 100-240V 50/60Hz output voltage: 12/24V initial minimum voltage: >2V power under load: max. 240W max. charging current: 12V: 15A / 24V: 10A air cooling battery charge level indicator voltage and charging current indicator ambient temperature sensor (if temperature. drops below 10°C.The rectifier increases the charging voltage if the temperature. will rise above 28°C.C rectifier reduces charging voltage) signaling poor battery connection/contact contamination/battery damage length. power cable: approx. 300 cm length. wires with terminals: ok. 90cm device dimensions: 16x9x5cm The charging process, depending on the chosen mode, can occur in up to a 9-stage cycle. It ensures the safety and durability of the battery.