⭐Rechargeable battery. Store in a dry and cool place. The service life is about 10 years. Keep your battery-powered equipment working normally✅Model: AAA / AA ✅Type: Nickel Hyoride rechargeable battery✅Nominal capacity: 3000 mAh (AA) 1800 mAh (AAA) ✅Set type: battery only✅Replacement battery: Yes✅ Number of batteries: 4-20 ✅Size: AAA and AA ✅Voltage: 1.2 V ✅Usage: shaver, LED lighting, wireless microphone, etc.❗❗❗Warning: Do not heat, incinerate or reverse polarity.