Samsung Q318 11.1V Laptop Replacement Battery AA-PB9NC6B
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Samsung Q318 11.1V Laptop Replacement Battery AA-PB9NC6B - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Samsung Q318 11.1V Laptop Replacement Battery AA-PB9NC6B - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Samsung Q318 Series — 11.1V Li-ion Replacement Battery (AA-PB9NC6B)
This is an 11.1V 4400mAh Li-ion battery for the Samsung Q318 notebook series, including the Q318-DSOE, Q318-DS0H, and Q318-DS02. It replaces the original AA-PB9NC6B and a broad range of cross-compatible OEM part numbers including AA-PB9NS6B, AA-PL9NC6W, and AA-PB9MC6B. Physical dimensions are 204.00 × 48.20 × 20.00mm — confirm these against your existing cell before installing.
- Q318 series connector and BMS compatibility: All Q318 variants listed share the same 11.1V three-cell Li-ion architecture, connector pinout, and BMS handshake protocol. The replacement cell communicates on the same SMBus line as the original, so the laptop recognises the pack at POST without any firmware workaround.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Q318 unit. The BMS held charge termination correctly at 12.6V and engaged protection cutoff at the low-voltage threshold without triggering false over-current trips under combined CPU and display load.
- First-cycle calibration on the Q318: After installation, run the battery down until the laptop hibernates on its own, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health or unknown-status warning that appears after every cell swap on this platform.
Why the Q318 BIOS reports poor health or "unknown" immediately after a battery swap
The Q318 stores learned charge data in EEPROM on the battery pack itself. When you fit a new cell, the BIOS reads that EEPROM as blank or mismatched against its last known state, then flags the battery as degraded or unrecognised. This is not a fault with the replacement cell — it is the system's fuel gauge IC losing its reference point. Running one complete discharge-to-hibernate followed by an uninterrupted charge to 100% gives the BIOS enough data to rebuild its capacity baseline. After two to three full cycles, the health report normalises and the warning clears.
Q318 shutting down suddenly with 20–30% charge still showing on screen
This happens when aged cells cannot sustain the voltage rail under combined CPU and display load — the cell voltage drops below the BMS cutoff threshold faster than the fuel gauge can track it, so the displayed percentage is still high when the system dies. The fuel gauge IC on the Q318 calibrates its percentage estimate against actual cell voltage over time, so a new cell showing this behaviour on the first few cycles is normal — it has not yet learned the new cell's discharge curve. Force the calibration by letting the laptop run on battery under normal workload until it hibernates, then charge fully. After two cycles the gauge catches up to the new cell's voltage profile and the premature shutdowns stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Samsung
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Q318 shows the battery Wh rating as wrong in system info after fitting the new cell — is something broken?
Nothing is broken. The Wh figure shown in Windows or Samsung's power utility is pulled from the EEPROM on the battery pack, and that data reflects the original factory rating of the old cell, not a live measurement. The new AA-PB9NC6B cell carries its own EEPROM value of 48.84Wh, which Windows reads correctly once the BIOS completes its first learn cycle. Run one full discharge to hibernate and charge back to 100%, then check system info again — the reported Wh value will match the new cell.
The Q318's fuel gauge is jumping around wildly — it reads 60%, then 80%, then drops to 40% within minutes. What's happening?
The fuel gauge IC on the Q318 builds its percentage model from historical charge and discharge data stored against the old cell. After a swap it has no valid baseline for the new chemistry, so it estimates erratically using stale reference points. This is not a battery fault — it is the IC recalibrating against fresh cell behaviour. Run two to three full discharge-to-hibernate and uninterrupted-charge-to-100% cycles under normal use, and the gauge will stabilise. By the third cycle the readings should track smoothly without large jumps.
The new battery on my Q318 won't charge past 80% — the charging light goes off and Windows says "plugged in, not charging" at 80%.
This is a BIOS-controlled charge limit, not a fault with the replacement cell. Samsung's firmware on some Q318 builds activates a charge threshold feature that caps the battery at 80% to reduce long-term cell stress — it is enabled in the BIOS or via Samsung Settings software. Open Samsung Settings (or Samsung Battery Manager if installed), find the battery life extender or charge limit option, and switch it to 100% maximum charge. If that software is not installed, check the BIOS power management page for a charge threshold setting and disable it there.
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