Willoughby's via Amazon offers Amazon Prime members the Sony Cycle Energy Charger with Two NiMH AA Rechargeable Batteries, model no. BCG34HLD2RN, for $4.99 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's the lowest total price we could find by $9. It features a 3-hour charge time.

Amazon Prime membership is $79 per year; however, Prime is free for college students for one year, and free for parents and caregivers for three months.