Built-in protection circuit (PCM) prevents over charging/discharging.
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1500mAh Rechargeable Gumstick Battery NC-6WM NH-14WM NH-10WM For SONY WALKMAN
3.7V 600mAh Battery for Sony Walkman LIS1427 LIS1374 NWZ A/E/S MP3 Player Repair
Gum stick Battery Charger For Sony Walkman Cassette Players CD MD Panasonic Aiwa
