Panasonic BK-3HCCA8BA eneloop pro AA Pro AA Battery. These are excellent high mAh rechargeable AA batteries. They are low self discharge, meaning they will hold about 85% of their charge after a year in storage. Note, rechargeable AA and AAA batteries will not run some devices that require slightly higher voltages. In those you should use Energizer or Duracell AA batteries. We use eneloop pro batteries in flashlights and other AA and AAA devices around the house. They can be recharged up to 500 times. After you recharge them only 10 times and you have them paid for, so they are a great way to save money long term.
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