45Wh Samsung AA-PBUN3QB Battery

45Wh AA-PBUN3QB Battery for Samsung 300E4M, 300E5K, 500R5M, 550R5L, 7 Spin NP740U3L / NP740U5L and Odyssey NP800G5M Series

This 45Wh Samsung AA-PBUN3QB battery is designed for compatible Samsung laptops,
including selected 300E4M, 300E5K, 500R5M,
550R5L, NP740U3L, NP740U5L,
NP800G5M, and related Samsung notebook series. It is a suitable choice when your
current battery drains quickly, no longer holds a charge, or your Samsung laptop needs stable
portable power again.

With an 11.4V output voltage, 3950mAh / 45Wh capacity, and
3-cell battery design, this battery supports everyday laptop use such as office
work, study, browsing, email, documents, video playback, online meetings, and travel.

Product Information

Compatible Part Numbers

Please compare the part number printed on your current battery before ordering. This battery is
suitable for the following Samsung battery part numbers:

• Samsung AA-PBUN3QB
• Samsung AA-PBUN3AB
• Samsung 1588-3366

Compatible Model Series

This Samsung AA-PBUN3QB battery is designed for the following Samsung laptop model series. Please
check both your laptop model and battery part number before placing your order.

Samsung 300 / 500 / 550 Series

• Samsung 300E4M
• Samsung 300E5K
• Samsung 500R5M
• Samsung 550R5L
• Samsung NP530E5M
• Samsung NT500R5L

Samsung 7 Spin / NP740U Series

• Samsung 7 Spin NP740U3L
• Samsung 7 Spin NP740U5L
• Samsung 740U3L
• Samsung 740U5L
• Samsung NP740U
• Samsung NP740U3L
• Samsung NP740U3M
• Samsung NP740U5L
• Samsung NP740U5M

Samsung Odyssey / Gaming Series

• Samsung Odyssey NP800G5M
• Samsung NP800G5M
• Samsung 8000GM
• Samsung 800G5M
• Samsung 810G5M
• Samsung 8500GM
• Samsung NP8500GM

Additional Compatible Samsung Models

• Samsung NP350XAA
• Samsung NP730QAA
• Samsung NT760XBE
• Samsung NT760XBV

When Should You Replace Your Samsung Laptop Battery?

If your Samsung laptop no longer provides enough runtime for normal use, replacing the battery can
help restore convenient portable performance without replacing the entire laptop.

• The battery drains much faster than before.
• The laptop shuts down unexpectedly during use.
• The battery percentage drops suddenly or behaves abnormally.
• The laptop only works when connected to the charger.
• The battery does not charge to full capacity.
• Windows or BIOS shows a battery health warning.

Why Buy This AA-PBUN3QB Battery?

• Wide Samsung compatibility: suitable for selected Samsung 300E, 500R, 550R, NP740U, Odyssey, and related notebook series.
• 45Wh capacity: supports everyday laptop use, office work, study, browsing, documents, email, and travel.
• 3-cell battery design: made for compatible Samsung systems using the listed AA-PBUN3QB battery specification.
• Stable power output: built for compatible Samsung laptops that use 11.4V AA-PBUN3QB batteries.
• Brand new battery: a practical option when your current battery becomes weak or unreliable.
• 12-month warranty: gives customers more confidence when ordering.
• 30-day return policy: provides extra peace of mind after purchase.

Important Compatibility Reminder

Samsung laptop batteries may look similar but can have different voltage, connector position,
battery shape, capacity, color, or internal layout. Before ordering, please confirm that your
current battery part number matches AA-PBUN3QB, AA-PBUN3AB, or
1588-3366.

You can usually find the battery part number printed on the battery label. You can also check your
Samsung laptop model number on the bottom cover, Windows system information page, BIOS, or original
device label.

Before Ordering

• Verify your exact Samsung laptop model number.
• Compare your current battery part number with AA-PBUN3QB or AA-PBUN3AB.
• Compare your current battery shape with the product images.
• Confirm that the battery connector type and position match your original battery.
• Check that your current battery voltage matches the product specification.
• Contact us if you need help confirming compatibility before purchase.

Installation Notes

• Turn off the laptop completely before replacing the battery.
• Disconnect the charger and any external devices.
• Use the correct tools and open the laptop carefully to avoid damaging the case, screen, or internal parts.
• Do not bend, puncture, disassemble, or force the battery during installation.
• Make sure the battery connector is properly aligned before closing the back cover.
• After installation, charge the battery fully before regular use.
• If you are not familiar with Samsung laptop repair, professional installation is recommended.

Frequently Asked Questions

Is this battery suitable for Samsung AA-PBUN3QB?

Yes. This battery is suitable for Samsung AA-PBUN3QB.

Is this battery compatible with Samsung AA-PBUN3AB?

Yes. Samsung AA-PBUN3AB is included in the compatible part number list.

Does this battery fit Samsung 300E4M and 300E5K?

Yes. This battery is listed for selected Samsung 300E4M and 300E5K laptops.

Can this battery be used for Samsung 500R5M and 550R5L?

Yes. Samsung 500R5M and 550R5L are included in the compatible model list.

Does this battery fit Samsung 7 Spin NP740U3L and NP740U5L?

Yes. This battery is listed for selected Samsung 7 Spin NP740U3L and NP740U5L models.

Does this battery support Samsung Odyssey NP800G5M?

Yes. Samsung Odyssey NP800G5M is included in the compatible model list.

What voltage is this battery?

This battery has an output voltage of 11.4V. Please compare it with the voltage printed on your
current battery before purchase.

What capacity is this battery?

The battery capacity is 3950mAh / 45Wh.

How many cells does this battery have?

This battery uses a 3-cell design.

Is this battery brand new?

Yes. This product is listed as brand new.

What should I check before buying?

Please check your Samsung laptop model, current battery part number, battery voltage, battery shape,
and connector position. The safest way to confirm fit is to compare the part number on your current
battery with AA-PBUN3QB, AA-PBUN3AB, or
1588-3366.