These are identical to the Panasonic HHR-4DPA, which can be bought here on Amazon for half the price. See: Panasonic NiMH AAA Rechargeable Battery for Cordless Phones (HHR-4DPA/2B) They are also interchangeable with just about any Ni-MH rechargeable AAA battery, most of which are less expensive and have greater capacity. (Capacity, measured in mAh, describes how much energy the battery can hold and will determine, for example, how much talk time you'll get on a cordless phone before rechargin.) These are 550 mAh. Many other name brand rechargeable batteries (e.g. Duracell Pre Charged Rechargeable Nimh AAA Batteries, 4-Pack or SANYO NEW 1500 eneloop 4 Pack AA Ni-MH Pre-Charged Rechargeable Batteries) that can be purchased for less have significantly greater capacity. Enloop claims to use a newer technology that retains its capacity over more charges. Panasonic Replacement HHR-65AAABU AAA 2 Pack for Panasonic Phones
These batteries work great in my Panasonic wireless phone. More importantly, some sellers substitute a cheaper model of battery that only lasts for a few weeks. I received the Panasonic batteries just as displayed and they are working great in my wireless phone. They are more expensive, but last 10 times longer than the cheaper substitutes. - Phone Battery'
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