4A Smart Auto Battery Charger - 6 and 12 volts - Fully Automatic - Maypole 7423A

Outputs: 6V: 4A DC 12V:4A DC. Using a full synthetic oil may help to reduce oil consumption if a mineral or semi-synthetic oil is being used. Mineral based oils consist of a mix of different sized molecules and the smaller ones can evaporate and then burn relatively easily, increasing the rate of oil consumption.

eBay