Duracell D2A 2Amp 12-Volt Battery Maintainer / Charger for $10.00. Here is a screenshot for your reference. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping. This battery maintainer maintains and extends the life of a battery for ATV, snowmobile, motorcycle, car or truck. It usually sells for over $20.