BONAI Rechargeable C Batteries 4 Pack, 5,000mAh High Capacity 1.2V Ni-MH C Cell Battery, Long-Lasting Power for Flashlights, Radios & Toys, Pre-Charged & Low Self-Discharge (Size C, 4 Count)

Customers find these rechargeable batteries to be of good quality and consider them a cost-effective alternative. The battery life receives mixed feedback - while some customers say they hold charge well, others report that they don't get fully charged to 100%.