Laptop Battery for Dell Inspiron 14 (3421), 14R (5421), 14R (5437),15 (3521),15R (5521), 15R (5537), 17 (3721), 17 (3737), 17R (5721), 17R (5737)

• Voltage: The battery voltage is typically 11.1 volts or 14.8 volts, depending on the specific model. This voltage is crucial for compatibility with the laptop.
• Capacity: It’s measured in milliampere-hours (mAh) or watt-hours (Wh), indicating how much charge the battery can hold. Common capacities range from around 2200mAh to 4400mAh or more.
• Cell Type: Lithium-ion (Li-ion) or Lithium-polymer (Li-Po) cells are common for laptop batteries.
• Number of Cells: Laptop batteries often have multiple cells. Common configurations include 4-cell, 6-cell, or 8-cell batteries, which affect the battery’s capacity and runtime.
• Connector Type: The connector type refers to the interface used to connect the battery to the laptop. It’s typically specific to the laptop model and battery design.
• Color: The color of the battery casing is usually black, but this can vary depending on the manufacturer.

When purchasing a replacement battery, it’s essential to ensure compatibility not only with the laptop model but also with the specific battery model or part number. Additionally, checking reviews and warranties can help ensure you’re getting a quality product.