(UNiROSS)HYBRIO Multi Usage+ Rechargeable Batteries 2 x D Converters + 2 x AA Long Life Come Charged & Stay Charged.. Replace up to 1000 ordinary batteries.. Smart and handy, these 2 in 1 batteries are 100% compatible with all applications! Pack contains 2 x AA batteries which convert into 'D' size batteries. HYBRIO Tecnology: UNiROSS rechargeable batteries revolutionary technology, combines the benefits of both rechargeable and ordinary batteries! Ready for use, straight from the pack and stay charged for a long time, like ordinary rechargeables, they are ecological and economical too! + Performance: Come charged and stay charged! The Hybrio innovation enables an extremely low self-discharge rate. At rest, they hold their charge for more than a year. + Convenience: With the Supplied converters, you turn AA batteries into D batteries in a snap of the fingers! Features: - 2 x AA Battery Pack. - 2 x D Converters. - +Performance(come ready charged) - Hybro Innovation(extremely low discharge rate) - Resting(holds charge for approximately 1 year) - Enviromentally Friendly.