How to replace a Dell laptop battery depends on how the battery is placed. According to the information provided, Dell laptops have two battery placement methods: external and internal.
For external batteries, just pull the locks on both ends of the battery to remove it. This means you can access and replace the battery directly from the bottom or the side.
For the built-in battery, you need to first remove the screws on the back panel and disconnect the cable, and then unscrew the screws that secure the battery to remove it. This means you need to open the laptop's back panel to access and replace the battery mounted inside.
The specific operation steps may vary slightly depending on the model, please make sure to read the relevant product manual or refer to the guide provided on Dell's official website before performing any operation.
To sum up, to replace the battery of a Dell laptop, first determine whether the model used is an external or internal type; if it is an external type, unlock and take it out by flipping the lock; if it is an internal type, then You need to remove the back panel, disconnect the cables, and unscrew the fixing screws to take it out.