How do I check which Dell battery I need?
Read the part number and voltage on the old Dell battery, or use the laptop model from the bottom sticker. Dell service tags can also identify the exact configuration.
Dell battery codes vary widely across Inspiron, Latitude, Vostro and XPS lines. A Latitude battery will not fit an Inspiron just because both are Dell, so match the Dell part number and voltage from the old battery before ordering.
Each Dell battery here lists voltage and capacity (Wh). Share your Dell part number or service tag model if you want compatibility confirmed before we ship.

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Read the part number and voltage on the old Dell battery, or use the laptop model from the bottom sticker. Dell service tags can also identify the exact configuration.
Yes. Use the exact voltage printed on the original Dell battery. Capacity (Wh) can be equal or higher, but the voltage must match.
Flip the laptop over or remove the old battery and read the part number and voltage printed on it (for example, a code like “HSTNN-LB7J” with “11.55V 41Wh”). Match that part number, voltage and capacity to the listing. The laptop model number on the bottom sticker also helps narrow it down.
An original (OEM) battery is made or branded by the laptop manufacturer. A compatible battery is built to the same voltage, capacity, connector and shape and works the same way, usually at a lower price. Both are fine as long as the voltage and part number match your laptop.
No. A higher-capacity battery at the same voltage simply lasts longer per charge. What you must never change is the voltage. A different voltage can fail to charge or harm the laptop.
Yes. Replacement batteries carry a replacement warranty (commonly 6 months); the exact term is shown on each product page along with the DOA (dead-on-arrival) support window.