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Compaq Presario CQ45-303TU Laptop Batteries

Batteries Plus Bulbs is your source for quality Compaq laptop batteries. Each of our laptop battery packs are made with the highest-quality battery cells, from leading manufacturers. They are engineered to meet or surpass OEM specifications and keep your Compaq Presario CQ45-303TU laptop powered while you are on-the-go.

Duracell Ultra Battery for Compaq Presario CQ45-303TU Laptop
  • Designed to meet or exceed the runtime of the original battery
  • Powered by Duracell Ultra
  • 12 month warranty
Brand: Duracell Ultra
Voltage: 11.1
Capacity: 4400MAH
Limited Quantity at Ashburn

Duracell Ultra High Capacity Battery for Compaq Presario CQ45-303TU Laptop
  • Extended capacity battery delivers the extra runtime you need
  • Trusted Duracell Ultra brand
  • 24 month warranty
Brand: Duracell Ultra
Voltage: 11.1
Capacity: 8800MAH
Limited Quantity at Ashburn

Compaq Laptop Battery Analysis

When your Presario CQ45-303TU laptop starts performing slowly, or has a short run time, you may need a new battery. We can help you make sure. Let us analyze your laptop battery before you purchase. We use leading-edge testing tools to evaluate your battery, determine capacity, and expected life of your battery. Learn more about battery analysis or visit your local store for complete details.


Remember to recycle. Batteries Plus Bulbs is a leader for laptop and notebook battery recycling. Each Batteries Plus Bulbs location offers battery recycling services. Learn more about our recycling programs for consumers and businesses.

Have more questions? Contact us or visit your nearest store.

Tips To Extend Your Compaq Battery Life

  • Unplug the charger or remove the battery when not charging.
  • Keep device and battery in a cool dry place (heat destroys a battery).
  • Disable unnecessary programs that draw energy from your computer.
  • Shut down or use hibernate mode to minimize battery drain.