Toshiba Netbook NB100 Replacement Battery 7.2V 4400mAh
This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.
WECARE5
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Toshiba Netbook NB100 Replacement Battery 7.2V 4400mAh - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
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
⚠️ 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.
Toshiba Netbook NB100 Replacement Battery 7.2V 4400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.2V
Amp
4400mAh
Toshiba Netbook NB100 Series — 7.2V Li-ion Replacement Battery (PA3689U-1BRS)
This is a 7.2V, 4400mAh Li-ion replacement battery for the Toshiba Netbook NB100 range. It fits the NB100, NB100-01G, NB100-111, NB100-12A, and over 34 additional NB100 variants. Replaces OEM part numbers PA3689U-1BAS, PABAS155, PA3689U-1BRS, and PABAS156.
- NB100 series compatibility: All NB100 variants share the same 7.2V two-cell Li-ion architecture, identical connector pinout, and the same BMS handshake protocol. A single cell swap covers the full model range without modification.
- Bench tested on actual hardware: We cycled this cell on an NB100 chassis under combined CPU and display load. The BMS held charge termination correctly at 8.4V and triggered low-voltage cutoff cleanly without dropping into an unrecoverable drain state.
- First-cycle recalibration on the NB100: After installing, 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 the NB100 displays after every cell swap.
Why the NB100 BIOS flags a new battery as poor health immediately after swap
The NB100 BIOS reads health data from the battery's EEPROM on first contact. A new cell ships with factory EEPROM values that don't match the old cell's learned cycle history, so the BIOS interprets the mismatch as degraded health. This is a data conflict, not a cell fault. Running the battery learn cycle — one full discharge to hibernate, one uninterrupted charge to 100% — overwrites the stale EEPROM reference. After two to three cycles, the BIOS health indicator normalises.
NB100 shutting down abruptly at 20–30% charge shown
This happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The IC still references the old cell's discharge profile, so it misreads remaining capacity and the system shuts down well before the gauge reaches zero. The fix is calibration: discharge the NB100 fully to automatic hibernate cutoff, then charge to 100% without interruption — repeat this two to three times. After calibration, the gauge tracks accurately and the early shutdowns stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Toshiba
- 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
The NB100 BIOS is showing the new battery as 0% or "unknown" right after I installed it — is the cell dead?
The cell is almost certainly fine. The NB100 BIOS reads capacity and state data from the battery's EEPROM on first connect, and a new cell's EEPROM doesn't carry the old discharge history — the BIOS reports it as unknown as a result. Boot the laptop and let it charge to 100% uninterrupted, then run it down to hibernate cutoff. After one full cycle, the BIOS should register the battery correctly.
Windows is showing a wildly different Wh rating for this battery than what's listed on the pack — why don't the numbers match?
The Wh figure Windows displays is pulled from the EEPROM embedded in the battery controller, which stores the manufacturer's rated value at time of production. The product listing shows 31.68Wh calculated from measured cell capacity under bench conditions — these two figures come from different sources and rarely match exactly. The discrepancy is a reporting difference, not a fault. Verify the cell is functioning by checking that charge voltage reaches 8.4V at full charge.
My NB100 charges but won't go above 80% — it just stops there and shows "plugged in, not charging"
Some NB100 BIOS versions include a charge-limit firmware setting that caps charging at 80% to reduce long-term cell stress — this is a BIOS control, not a fault with the replacement cell. Check the Toshiba Power Management utility or BIOS settings for a "battery care mode" or "eco charge" option and disable it. If no such setting is present, discharge fully to hibernate cutoff and recharge to 100% uninterrupted — this forces the charge controller to re-evaluate the full 8.4V target.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
