1. Perfect Standard Size AA Battery: Dimensions:Height 1.97inch,Diameter 0.55inch,12 Counts Double AA Batteries AA 2000mAh Ni-MH rechargeable batteries 2. Pre-charged Batteries:Long-Lasting Batteries AA rechargeable come pre-charged partially and can be used immediately out of the package. Recommended to use double a batteries after fully charged 3. Low Self discharge batteries: Improved low self discharge makes it still maintain 80% of capacity after 3 year of non-use 4. Ready-to-use Devices: 12 Packs Premium AA rechargeable Batteries are great for use in household devices such as digital cameras, toys, remote,scanner 5. Anti Leakage Protection:Designed with unique ring of anti-leakage and extra DBCK steel cell, the NIMH AA batteries is more safer and no leakage, better protect the battery and your property 6. AA 2000mah nimh 1.2v Rechargeable Batteries:1200 Tech, ProCyco (Professional recycle) helps maximize its best power performance while charging