One of the most common problems encountered with Panasonic rechargeable phone batteries is difficulty in holding a charge. This issue is commonly attributed to a phenomenon known as "memory effect."
Batteries for portable telephones, such as those manufactured by Panasonic, typically have a normal service life of 1 to 3 years. However, improper charging and discharging practices may shorten the lifespan of these electronic devices. Memory effect may occur and result in a loss of capacity if the battery is not properly and fully discharged. This particular issue commonly affects nickel-cadmium batteries.
Although Panasonic claims that memory effect is practically non-existent, the company has installed a fail-safe feature for its nickel-cadmium cordless phone batteries to counter possible memory problems.