Sharpstar 4 pcs AA 2700 mAh, 1.2 V Ni-MH battery pack, which emphasizes high capacity
Powerex PRO AA (2nd Gen) – 4-pack; 2700 mAh, built for high-drain devices; rated for 500 recharge cycles; strong temperature performance; retains up to 60% charge even after 5 years of storage