The Oxford Oximiser 900 (888 Anniversary Edition) can be left permanently connected to provide guaranteed long term battery care.888 Anniversary model for 45 years6 Stage Battery Maintenance SystemPolarity check for connection concernsBattery analysis to assess what is neededBulk fast charge for quick charging to 85%Absorption charge to ensure 100%Voltage check every hour for battery healthMaintain mode to ensure voltage and condition is maintained2 year warranty from OxfordThe Oxford Oximiser 900 (888 Anniversary Edition) 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.6 stage battery management system:Polarity checks: checks the battery leads have been connected correctlyBattery Analysis: Assesses battery and determines best charging methodBulk Fast Change: Charges at a fast rate to bring the battery to approximately 85% capacityAbsorption Charge: Lowers th