NiMH vs. alkaline? When to choose rechargeable over disposable batteries | Panasonic eneloop
Rayovac AA 4-Pack NiMh Batteries (4 stores) • Prices »
Duracell Rechargeable AA Batteries - 4 Pack - Compatible with NiMH Battery Chargers | Connecticut Post Mall
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AA Batteries - USB Rechargeable Double A Lithium Batteries - Li-ion Battery Cell - 1.5V / 1700mAH (4-Pack) - Not NI-MH/NI-CD/Alkaline Batteries - ECO-Friendly and Recyclable - No Memory Effect(Green)
Nickel–metal hydride battery - Wikipedia
Choosing and Using Nickel-Metal-Hydride (NiMH) Rechargeable Batteries