The Oxford Oximiser 900 can be left permanently connected to your motorcycle to provide guaranteed long-term battery care. Ideal for months when not in use. This is suitable for all 12v battery types up to 30Ah, including gel, Mf and acid batteries. Heavily discharged batteries as low as 4.1V can be charged if the battery is not damaged. This has a 6-stage battery management system: Polarity checks: checks the battery leads have been connected correctly, Battery Analysis: Assesses battery and determines the best charging method, Bulk Fast Change: Charges at a fast rate to bring the battery to approximately 85% capacity, Absorption Charge: Lowers the charge rate and gives a topping charge to ensure the battery is charged to 100%, Voltage charge: Hourly voltage checks assess battery health, Maintain Mode: Applies and appropriate charge if voltage drops outside acceptable limits to ensure the battery voltage and condition remains perfect. The ideal addition to your garage. Very easy to use.