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New 10.8V 66Wh 6-Cell Li-ion Battery for Toshiba Dynabook R830 R835 R930 R935 Portege R700 Tecra R940 Replaces PA3931U-1BRS PA5043U-1BRS PABAS265

  • Restore Your Toshiba Laptops Portability Dont let a wornout battery chain you to a wall outlet. This 66Wh 6cell replacement delivers allday power for work, travel, or study.
  • Exact Fit for 100+ Toshiba Models Compatible with Dynabook R730/R830/R835/R930/R935, Portege R700/R705/R830/R835, Satellite R630/R830/R845, Tecra R840/R940. Replaces PA3931U-1BRS, PA5043U-1BRS, PABAS235/236/249/250/265, and more.
  • 66Wh 10.8V High Capacity Enough runtime for crosscountry flights, backtoback meetings, or full days of remote work. No more low battery anxiety.
  • Premium Grade A Liion Cells Unlike cheap generics that bulge or fail within months, this battery uses topgrade cells for stable voltage, consistent discharge, and longer cycle life.
  • Safe & 100% Tested Builtin overcurrent, overvoltage, overheating, and shortcircuit protection. Each unit tested before shipping. Install with confidence.
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Overview
Specs
Reviews
Why You Need This Battery

Your Toshiba Dynabook, Portege, Satellite, or Tecra laptop was once a reliable travel companion. But after years of daily charging, the original battery likely drains in under an hour, shuts down at 30%, or forces you to stay plugged in.

This PA3931U-1BRS replacement solves all of that.

Designed for Toshiba Business & Consumer Laptops

This battery is a direct fit for hundreds of models across these series:

Dynabook: R730, R731, R732, R741, R742, R830, R835, R930, R935, RX3, RX3W
Portege: R700, R705, R830, R835, R930, R935
Satellite: R630, R830, R835, R845
Tecra: R840, R940



Specifications

You Can Trust

Chemistry: Li-ion (6cells)

Voltage: 10.8V

Capacity: 66Wh

Color: Black

Condition: Brand New Grade A cells

Compatible Part Numbers (Partial List)

Common P/N
PA3931U-1BRS / PA3930U-1BRS
PA5043U-1BRS / PA5043U-1BR
PA3831U-1BRS / PA3832U-1BRS / PA3833U-1BRS
PA3929U-1BRS
PABAS235 / PABAS236 / PABAS249 / PABAS250 / PABAS265
What a Failing Battery Costs You

Sudden shutdowns during presentations or video calls

Performance throttling (slower CPU) when unplugged

Swollen battery warping the palm rest or bottom case

Constantly searching for an outlet no true mobility

This 66Wh 6cell replacement gives your Toshiba a second life. Enjoy hours of untethered productivity whether youre in a coffee shop, on a plane, or working from home.

Safety & Reliability

Every battery includes builtin protection against overcurrent, overvoltage, overheating, and short circuits. Grade A Liion cells ensure consistent power delivery. We test each unit before shipping.

Easy Installation

Flip your laptop over, slide the battery release latch, remove the old battery, and insert the new one. Fully charge before first use for optimal performance.

Before You Order

Please doublecheck your original battery part number (printed on the label) look for PA3931U-1BRS, PA5043U-1BRS, or PABAS265. Also verify your laptop model from the compatibility list above. If your model uses a different shape or connector, this battery will not fit. When in doubt, compare pictures or contact us.

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

  • Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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