Compact charging kit with quartet of 2,000 mAh AA batteries for digital cameras, remotes, and more Pre-charged and ready to use right out of the pack; preserves charge for long periods of time Extremely slow self-discharge rate maintains 85 percent of capacity after 1 year of storage Over-voltage protection system; foldaway AC plug offers worldwide voltage for traveling Batteries can be charged up to 1,000 times (including partially) without experiencing memory effect