Samsung Q318 11.1V 6600mAh Replacement Battery AA-PB9NC6B
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Samsung Q318 11.1V 6600mAh 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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Samsung Q318 11.1V 6600mAh Replacement Battery AA-PB9NC6B - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
6600mAh
Samsung Q318 Series — 11.1V Li-ion Replacement Battery (AA-PB9NC6B)
This is an 11.1V, 6600mAh (73.26Wh) Li-ion battery for the Samsung Q318 notebook series, including the Q318-DSOE, Q318-DS0H, and Q318-DS02. It replaces a degraded or failed original pack when the laptop can no longer sustain charge away from the mains. Cross-compatible OEM part numbers include AA-PB9NS6B, AA-PB9NC5B, AA-PL9NC6W, and AA-PB9MC6B among others.
- Q318 series compatibility: These Q318 variants share the same 11.1V three-cell voltage rail, identical connector pinout, and the same BMS handshake protocol — which is why a single replacement pack covers the full model range without modification.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on Q318 hardware. The BMS engaged thermal protection correctly, cell balancing held within spec across all three cell groups, and the pack communicated accurate state-of-charge data back to the system.
- Post-install calibration on the Q318: After fitting this pack, run one full discharge until the laptop hibernates on low battery, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that shows up after every cell swap on this platform.
BIOS reporting battery health as poor immediately after fitting a new pack
Samsung's Q318 BIOS reads health data from EEPROM stored in the old battery pack — it does not automatically reset when a new pack is installed. The system compares current cell data against the previous pack's wear history, so a new pack can trigger a false "Replace Battery" or "Poor Health" flag straight out of the box. Running one complete discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its battery learn table against the new cell's actual chemistry. After two or three full cycles, the health indicator should update to reflect the new pack accurately.
Q318 shutting down abruptly at 20–30% charge shown on screen
This is a voltage-cliff failure, not a capacity problem. When the CPU and display pull peak load simultaneously, the cell voltage under load drops below the BMS cutoff threshold even though the fuel gauge still reads 20–30% remaining. The fuel gauge IC has not yet calibrated its discharge curve against the new cell, so it overestimates remaining capacity at the high-draw end of the cycle. Run two or three full discharge-to-hibernate cycles and the fuel gauge will recalibrate its endpoint — the shutdowns stop once the IC maps the actual voltage curve of the new cells down to the 3.0V per cell cutoff floor.
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
Samsung Q318 battery shows 0% or "unknown" in Windows right after I installed the new pack — is the battery dead?
No — this is the fuel gauge IC reading stale EEPROM data from the old pack rather than measuring the new cell. The Q318's battery management system needs at least one full discharge-to-hibernate cycle before it can map the new cell's voltage curve. Charge the laptop uninterrupted to 100%, then run it down until Windows forces hibernate, then charge back to 100% without stopping. After that cycle, the percentage and health status will reflect the actual new cell.
The Q318 laptop shuts off suddenly when I'm doing something intensive, but the battery indicator still shows 25% — what's happening?
Under heavy CPU and display load, the new cells are hitting a voltage drop that trips the BMS cutoff before the fuel gauge catches up — this is a voltage-cliff issue, not a faulty battery. The fuel gauge IC on the Q318 hasn't yet calibrated its discharge model against the new cell chemistry, so it reports 25% remaining when the pack is already near its minimum sustainable load voltage. Run two or three complete discharge-to-hibernate cycles and the IC will recalibrate its endpoint curve. The shutdowns stop once the fuel gauge correctly maps the voltage floor at approximately 3.0V per cell under load.
Windows battery report shows the Q318's new pack has a lower Wh rating than the spec — why doesn't it match 73.26Wh?
The Wh figure Windows reports is pulled from EEPROM data written at the factory, which reflects the rated capacity of the original pack's cell chemistry — not a live measurement of the new pack. Until the BIOS completes a full battery learn cycle, the system displays the old pack's rated Wh rather than recalculating from the new cell's actual energy density. Run one full uninterrupted discharge to hibernate, then charge to 100%, and the BIOS will rewrite the Wh entry based on observed cell data. After two cycles the reported figure will align closely with the 73.26Wh specification of this pack.
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