We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Eight black toner cartridges in a rectangular box

eSquareOne

eSquareOne S1-BR-TN850-08 toner cartridge 8-pack black TN850 TN820

SKU CH-MGT2-1K95C

Eight black high-yield cartridges, each printing up to 8000 pages, replace Brother TN850 and TN820 for a wide range of DCP, HL and MFC laser printers

  • Cartridge Quantity8 Pack
  • Cartridge ColorBlack
  • Replacement BrandBrother
  • Replacement ModelBrother TN850 TN820
  • Compatible ProductsBrother DCP-L5500DN DCP-L5600DN DCP-L5650DN HL-L5000D HL-L50
  • Approximate Page Yield8000 Pages
  • 8 black cartridges for high-volume printing
  • 8000 pages per cartridge at 5% coverage
  • Compatible with Brother DCP HL MFC series printers
  • Operates from 10 to 32.5°C and 20 to 80% humidity
  • ISO 9001 and ISO 14001 quality management

Eight-pack compatible toner for Brother printers

This eight-pack contains black toner cartridges that replace Brother TN850 and TN820 originals. It fits a long list of Brother DCP, HL and MFC laser printers used in offices and workgroups. Each cartridge is new and built to match the yield of the OEM high-yield version. Buyers who need colour output or a smaller quantity will not be served by this pack.

Yield measured at five percent coverage

The rated output is 8000 pages per cartridge when printed at five percent page coverage. Real-world yield drops quickly with dense text, graphics or duplex printing. The cartridges operate between 10 and 32.5 degrees Celsius and 20 to 80 percent relative humidity. Storage outside the minus 20 to 40 degree range or beyond the same humidity limits can degrade toner performance.

Straightforward drop-in installation

Cartridges insert directly into the printer without tools; the pack includes installation notes for reference. Common issues arise when the protective seal is not fully removed or when the chip is not recognised after a firmware update. Keeping the printer within the stated temperature and humidity range helps avoid print-quality defects.

Highlights

  • 8 black cartridges for high-volume printing
  • 8000 pages per cartridge at 5% coverage
  • Compatible with Brother DCP HL MFC series printers
  • Operates from 10 to 32.5°C and 20 to 80% humidity
  • ISO 9001 and ISO 14001 quality management

Specifications

BrandeSquareOne
ModelS1-BR-TN850-08
Cartridge Quantity8 Pack
Cartridge ColorBlack
Replacement BrandBrother
Replacement ModelBrother TN850 TN820
Compatible ProductsBrother DCP-L5500DN DCP-L5600DN DCP-L5650DN HL-L5000D HL-L5000DN HL-L5200DW HL-L5200DWT HL-L6200DW HL-L6200DWT HL-L6250DW HL-L6300DW HL-L6400DW HL-L6400DWT MFC-L5700DW MFC-L5800DW MFC-L5850DW MFC-L5900DW MFC-L6700DW MFC-L6750DW MFC-L6800DW MFC-L6900DW
Approximate Page Yield8000 Pages
Coverage5%
TypeCompatible
FeaturesThis is an eSquareOne alternative replacement for OEM product, replaces Brother TN850 TN820 Black toner cartridges. eSquareOne Toner cartridges are engineered to meet the highest standard of quality, yield and reliability.
OptionTN850
Operating Humidity20 to 80% RH
Storage Humidity20 to 80% RH
Operating Temperature10 to 32.5°C
Storage Temperature-20 to 40°C

Questions about this item

Should I buy the 8-pack or individual cartridges for my HL-L6200DW?

The 8-pack supplies eight black TN850-compatible cartridges at once, reducing reorder frequency for high-volume printing on models such as the HL-L6200DW.

What does the 8000-page yield mean for daily office use?

Each cartridge prints roughly 8000 pages at 5% coverage, so a typical office printing 200 pages a day would replace one cartridge about every six weeks.

Does the cartridge use a chip that works with Brother firmware updates?

The compatible cartridges are engineered to match Brother TN850 and TN820 specifications, allowing them to function with the listed DCP, HL and MFC series printers.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.