These rechargeable batteries are made by GP, Designed for frequent and intensive use in high power equipment like digital cameras, GPS and other AAA size battery equipment. Can be used with all good battery chargers.
Rechargeable batteries can save you £££s each year, rather than keep buying the non-rechargeable type. They cost pennies to recharge and they are also much better for the environment because you are not throwing away the damaging chemicals every time they are flat
Please note that the bottom 10mm of outer covering needs removing from each batteries to make them compatible with the Phillips Headphones.