Apc Model Bn450M Battery Replacement

APC BackUPS 450 VA Battery BackUp System Computers Tablets eBay
APC BackUPS 450 VA Battery BackUp System Computers Tablets eBay from www.ebay.com


The APC Model BN450M is a popular uninterruptible power supply (UPS) that provides battery backup and surge protection for electronic devices. Over time, the battery in the BN450M may need to be replaced to ensure optimal performance. In this article, we will discuss the process of replacing the battery in the APC Model BN450M.

Why Replace the Battery?

The battery in the APC Model BN450M has a lifespan of approximately three to five years, depending on usage. After this period, the battery’s capacity may decrease, resulting in reduced backup time during power outages. Replacing the battery will restore the UPS’s ability to provide extended power backup and protection.

Identifying the Correct Replacement Battery

Before purchasing a replacement battery for the APC Model BN450M, it is essential to ensure compatibility. The BN450M requires a sealed lead-acid (SLA) battery with specific voltage and ampere-hour (AH) ratings. To find the correct replacement, refer to the UPS’s user manual or visit the APC website for detailed specifications.

Step-by-Step Battery Replacement Process

Step 1: Prepare the Workspace

Before replacing the battery, make sure to turn off the BN450M and unplug it from the wall outlet. Clear a clean and well-ventilated workspace to perform the replacement.

Step 2: Open the Battery Compartment

Locate the battery compartment on the BN450M. It is usually on the rear or bottom of the UPS. Use a screwdriver to remove the screws securing the compartment cover. Carefully remove the cover to access the battery.

Step 3: Disconnect the Old Battery

Identify the battery’s connectors and gently disconnect them from the UPS. Take note of the positive and negative terminals to ensure proper connection during the replacement process.

Step 4: Remove the Old Battery

Take out the old battery from the compartment. Be cautious as batteries can be heavy. Dispose of the old battery following local regulations for proper battery disposal.

Step 5: Install the New Battery

Place the new battery into the compartment, ensuring it is properly aligned. Connect the battery’s connectors to the corresponding terminals, making sure to match the polarities correctly.

Step 6: Close the Battery Compartment

Securely reattach the battery compartment cover using the screws. Double-check that all connections are secure and tight to prevent any issues during operation.

Step 7: Test the New Battery

Plug the BN450M back into a wall outlet and turn it on. Perform a test to ensure the new battery is functioning correctly. Refer to the user manual for instructions on initiating a self-test.


Replacing the battery in the APC Model BN450M is a straightforward process that can significantly extend the UPS’s lifespan and performance. By following the steps outlined in this article, you can ensure a smooth battery replacement experience and continue enjoying reliable power backup and surge protection for your electronic devices.