Tesla Rechargeable+ are high-end, long-life NiMH accumulators. The application of advanced technology guarantees very low self-discharge and a life of at least 1,000 charging cycles. All the batteries are already charged at the factory and can be used immediately upon unpacking. They are suitable for all household appliances. These nickel metal hydride rechargeable batteries are AAA size and come in a pack of 4. They have a nominal voltage of 1.2 volts and a nominal weight of 13 grams. The batteries have a shelf life of 500 recharges and can be stored at temperatures between -20°C to 35°C.