Amazon offers its Amazon Prime members the Battery Tender Junior 12-volt Battery Charger
, model no. 012-0123, for $20.99
with free shipping
. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping adds $6.06.) That's $2 below our August mention and the lowest total price we could find by $14. This charger features a 12-foot cord and can be used with 12-volt lead-acid, flooded, or sealed maintenance-free auto batteries.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.