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.