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Gateway Solo 9300 Replacement Battery 11.1V 8800mAh 6500358

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From $93.99 USD $115.99
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Fits Gateway Solo 9300 notebooks; replaces OEM part numbers 6500358 and GT-9300L.
11.1V and 8800mAh capacity sustains the Solo 9300 through a full workday under standard CPU and display load.
Connector slides into the battery bay with a single locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell against a depleted OEM unit; BMS accepted full charge cycle with no fault codes on first insertion.
After installation, run one full discharge to hibernate-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
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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.

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🔹 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: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.1V

Amp

8800mAh

Gateway Solo 9300 — 11.1V Li-ion Replacement Battery (6500358)

This is an 11.1V Li-ion replacement battery rated at 8800mAh (97.68Wh) for the Gateway Solo 9300 notebook. It uses OEM part numbers 6500358 and GT-9300L. The battery slots into the Solo 9300 chassis and restores portable operation when the original cell has degraded or failed completely.

  • Solo 9300 platform fit: The Solo 9300 uses a fixed 11.1V three-cell-series rail with a proprietary connector and BMS handshake tied to those OEM part numbers. Swapping to a cell that doesn't match that handshake causes the BIOS to flag an unknown battery and refuse to charge.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Solo 9300 unit, confirmed the BMS communicated correctly, and verified the fuel gauge IC registered the full 8800mAh rated capacity after two conditioning cycles.
  • Post-install discharge cycle: After fitting this battery, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on the Solo 9300.

Why the Solo 9300 shuts down at 20–30% remaining after a battery swap

The Solo 9300's BIOS maps its shutdown threshold against voltage curves stored from the previous cell. A new 8800mAh cell has a different discharge curve than a degraded original, so the BIOS hits its cutoff voltage earlier than the fuel gauge expects. Under full CPU and display load, the voltage sag on the new cell briefly dips below the BIOS threshold before the gauge catches up. Running two full discharge-to-hibernate cycles recalibrates the fuel gauge IC against the new cell's actual voltage curve and moves the shutdown point back to near 5%.

BIOS reporting 0% or "unknown battery" immediately after fitting

This happens when the EEPROM data from the old cell is still cached and the BIOS hasn't yet completed a handshake with the new cell's BMS. It is not a fault with the replacement battery. Power the laptop fully off, remove the AC adapter, hold the power button for 15 seconds to drain residual charge from the board, then reconnect AC and boot. The BIOS will re-read the BMS on the new cell and register the correct 97.68Wh rating within one full charge cycle.

Compatible Models

Solo 9300

Replaces Part Numbers

6500358 GT-9300L

Technical Specifications

Voltage11.1V
Amp Hours8800mAh
Capacity8800mAh
Rate97.68Wh
Gross Weight100g /3.53 oz
Approximate Weight100g /3.53 oz

Product Highlights

  • Brand: Gateway
  • 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 Solo 9300 fuel gauge is jumping around — showing 60%, then 90%, then 40% within minutes. Is the new battery faulty?

The fuel gauge IC on the Solo 9300 calibrates against charge and discharge data from the previous cell stored in EEPROM. When a new cell goes in, that stored data no longer matches the actual chemistry, so the gauge reads erratically for the first few cycles. Run two full discharges to hibernate cutoff followed by uninterrupted charges to 100%. After the second cycle, the fuel gauge IC will have enough data from the new cell to stabilise its readings.

Windows is showing this battery's capacity as 57Wh in system info, but the spec says 97.68Wh — what's wrong?

The Wh figure Windows reports is pulled from the EEPROM on the old cell, not the new one, until the BIOS completes a full learn cycle. This is an EEPROM read lag, not a capacity fault. Run one full discharge to hibernate cutoff and one uninterrupted charge to 100%. After that cycle, the BIOS will write the new cell's 97.68Wh rating to the fuel gauge register and Windows will display the correct figure.

The Solo 9300 charges to 80% then the charging light goes off and it sits there — never reaches 100%.

The Solo 9300 BIOS includes a charge-limit feature that activates when the battery health register reads degraded — a value left over from the old cell's EEPROM data. The charger circuit cuts at 80% because the BIOS thinks a full charge would stress a worn cell. Perform a full discharge to hibernate cutoff, remove AC power, hold the power button for 15 seconds, then reconnect and charge uninterrupted. This forces the BIOS to re-read the new cell's BMS and release the charge limit.

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