Free rechargeable batteries (frugality forum at permies)
SkyRC - SkyRC Released a NEW AA/AAA Battery Charger - NC2200! This charger is specially designed for AA/AAA NiMH/NiCD Batteries. It has five working modes: Turbo(Fast Charge at 2.2A), Charge, Discharge, Refresh
Laerdal Rechargeable Battery for LCSU4 Suction Units-886113
BONAI LCD Smart Battery Charger for C D AA AAA 9V NiMH NiCD Rechargeable Batteries with Refresh Function - Walmart.com
Ansmann Powerline 4.2 Pro Battery Charger and Tester
Amazon.com: CITYORK 12 Bay Household Rechargeable Battery Charger for 1.2v AA AAA Ni-MH/Ni-CD Rechargeable Batteries with Refresh Function with AC Wall Adapter-Upgrade : Electronics
Ansmann 1001-0005-US Powerline 4 Professional Battery Charger - AA/AAA