Panasonic Eneloop AA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4 Pack $8.92 @ Amazon or $8.47 w/ S&S

BK-3MCCA4BA

• Recharge up to 2100 times
• Maintain up to 70% of their charge after 10 years (when not it use)
• 2000mAh type, 1900mAh min, Ni-MH pre-charged rechargeable battery
• Pre-Charged at the factory using solar power and ready to use
• No memory effect – batteries can be recharged when fully, or partially discharged

https://smile.amazon.com/dp/B00JHKSN76