Hahnel Synergy AA x 4

Ready to Use Fully Charged Batteries 2500mAh / 1.25V / 3.1Wh
Long Lasting Power - 6 Times More Shots than Alkaline Batteries
Low Self Discharge Retains 80% Oower after 1 Year
Rechargeable Long Battery Lifetime
Eco Friendly

Re-chargeable up to 500 times
Low self-discharge, retains 75% power after 1 year
Good High drain performance for long lasting power
Blister pack with four rechargeable batteries