The Battery Tender® Junior High Efficiency from Deltran (8V 1.25A) is much more than a trickle charger. It has a brain. It's lightweight, compact, and a fully automatic battery charger; very easy to use, especially in small spaces. It will keep your battery fully charged so that it is ready to go when you are! This unit replaces both the 021-0152 (BT Plus 8, 1.25A). This smart battery charger by Deltran is designed to fully charge an 8 volt battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers.* Flat Rate shipping is for the lower 48 states only.