Summary: Capable of over 11 hours of continuous playback (dependent on multiple parameters). See detail below. Genuine Panasonic rechargeable gumstick battery for use in compatible devices such as portable MiniDisc players/recorders. This model of battery is quite rare, and was included with devices such as the Panasonic SJ-MJ70. It is not easy to find one in such good condition.
Product Condition (Appearance): No callouts.
Product Condition (Functionality): Battery Test Results - Charged 1118 mAh Discharged 1065 mAh Delivered over 11 hours of continuous playback. Deliberately stopped testing after 11 hours but the battery still had remaining charge (27% capacity). Tested using a Sony MZ-E520, with inline remote control and earphones connected. Volume was set at around 50%. Playback was in SP mode (highest sound quality, and highest battery load). The battery was charged (storage charge to 40% capacity) and tested once again before shipping, but it will self-discharge over time.
Specifications: Nickel-metal hydride battery (Ni-MH) 1400 mAh 1.2 V
Note: These batteries were manufactured around twenty years ago. When managed correctly they should continue to be functional, but this cannot be guaranteed. Regular use of the battery is recommended for best results. Avoid discharging the battery completely, and recharge the battery when there is a small amount of charge remaining. In the case of portable MiniDisc devices, this is usually indicated by a flashing operation light, or flashing battery indicator on the inline remote control. Aim to charge to around 40% of battery capacity if there are no plans to use the battery for some time. Avoid leaving fully charged without using as this will negatively affect the lifespan of the battery.
