Product Overview
The PA3837U-1BRS laptop battery is listed for Toshiba Dynabook NB300 NB301 NB302 NB303 NB304 NB305 Series 10.8V 48WH. Key specifications include 10.8V, 48Wh, 4400mAh, Li-ion.
Replacement Battery Specification
| BatteryModel | PA3837U-1BRS |
|---|---|
| Capacity | 48WH/4400mAh |
| Voltage | 10.8V |
| Battery Type | Li-ion |
| Cell | Made in China, high quality guarantee |
| Color | Black |
| Condition | Replacement Battery (100% Brand New,1-year warranty!) |
Replace Part Numbers
- PA3837U-1BRS PA3837U PABAS239
FAQ
Q: What is the PA3837U-1BRS designed to do?
A: The PA3837U-1BRS provides replacement power for the listed laptop battery application and is identified for Toshiba Dynabook NB300 NB301 NB302 NB303 NB304 NB305 Series 10.8V 48WH.
Q: What performance should be expected from the PA3837U-1BRS?
A: The PA3837U-1BRS performance follows the listed 10.8V, 48Wh, 4400mAh, Li-ion. Runtime or operating duration varies with equipment load and use.
Q: Which equipment is the PA3837U-1BRS compatible with?
A: The PA3837U-1BRS is listed for representative models including Toshiba Dynabook NB300 NB301 NB302 NB303 NB304 NB305 Series 10.8V 48WH.
Q: How should the PA3837U-1BRS be installed or operated?
A: Switch off the equipment, remove the existing unit, fit the PA3837U-1BRS without forcing the connector, then complete an initial charge or function check.
Q: How should the PA3837U-1BRS be maintained and troubleshot?
A: Keep the PA3837U-1BRS dry and protected from impact or short circuits. If performance changes, stop use and inspect fit, connector and charging behavior.
Compatible Laptop Models
- For Toshiba Dynabook Models NB300 NB301 NB302 NB303 NB304 NB305 Series
Note:
This is not a complete list or inclusion of all compatible laptop models. You can open the back of your laptop to check the original battery model. If you have any compatibility questions, please contact us online.The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
China warehouse delivery method
Overseas Warehouse Shipping Times & Costs
Payment Methods
Paypal

Payments by PayPal, no PayPal account required. Paypal is safe and free for buyers.
PayPal account: Payment@batterymall.com
Account Name: ShenZhen KingSener Science and Technology Co., Ltd
Credit or debit card
VISA, MasterCard, the United States n Express,Maestro & Laser Card, APPLE Pay,etc.
PayPal never shares your financial information with us.
WeChat Pay
Currently only supports QR code payment. Please contact WeChat customer service and go to WeChat App to scan the QR code to complete the payment.
Google Pay
Pay with Google Pay, which is more convenient and faster.
Apple Pay
If you use an Apple device, you can use Apple Pay to pay, which is more convenient and faster.
Bank Transfer
Q&A
Quick FAQ:Laptop Battery Care & Troubleshooting
- How long does a KingSener battery last?2 to 3 years (approx. 500-800 charge cycles) under normal temperatures.
- Laptop says "Battery Not Detected". How to fix?1. Hard Reset: Unplug AC, remove battery, hold power button for 30 seconds.
2. Clean Contacts: Wipe metal connection pins.
3. Reset Drivers: Uninstall battery drivers in Device Manager, then restart.
4. Update BIOS: Ensure motherboard firmware is up to date. - Can I leave my laptop plugged in 24/7?Yes, the built-in TI chip prevents overcharging. Tip: To prevent long-term cell swelling, unplug and drain the battery to 40% twice a month.
- How do I store a laptop battery long-term?Store it at 50% charge in a cool, dry place. Never store at 0% or 100%. Cycle the battery every 3 months to maintain chemical activity.
-
Are KingSener batteries safe?Yes. All batteries feature built-in IC protection against short-circuits, over-voltage, and overheating. Fully CE, FCC, and RoHS certified.