HP, 8 GB, 55%
HP 21 Black Inkjet Print Cartridge (C9351AA)
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$48.85
$53.74
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Product line
- Elite Dragonfly G4 15
- Elite x360 23
- Pro x360 9
- ZBook Firefly G10 14
- Advanced 10
- Blackwire 38
- Designjet 12
- EliteBook 133
- EncorePro 12
- LaserJet 40
- LaserJet Enterprise 28
- LaserJet Pro 18
- ProBook 49
- Studio 14
- Z Turbo Drive 11
Screen size
- 10.9 cm (4.3") 17
- 13.5" 15
- 15.6" 74
- 16.2 x 12.1 cm 17
- 16" 43
- 20.3 cm (8") 28
- 6.9 cm (2.7") 11
- 95.04 x 53.86 mm 8
- 2" (5.1 cm) 7
- 4.3" (10.9 cm) 10
- 8" (20.3 cm) 7
- 13.3" 83
- 14" 167
- 15.6" (39.6 cm) 128
- 17.3" (43.9 cm) 18
Processor family
- 12th Generation Intel® Core™ i5 processor 30
- 12th Generation Intel® Core™ i7 processor 27
- 13th Generation Intel® Core™ i5 processor 239
- 13th Generation Intel® Core™ i7 processor 254
- AMD Ryzen 7 35
- AMD Ryzen™ 3 processor 21
- AMD Ryzen™ 5 PRO processor 35
- AMD Ryzen™ 5 processor 85
- AMD Ryzen™ 7 processor 50
- Core™ i5 122
- Core™ i7 143
- Intel Celeron 23
- Intel Core i5 88
- Intel Core i7 102
- Ryzen™ 5 34
Altitude
- 0 - 5,000 m 1
- 0 – 5,000 m 1
- 3,000 m 3
- 3,048 m 2
- 3000 m 3
- 3048 m 7
- Up to 2,000 m 11
- Up to 3,000 m 3
- Up to 3000 m 1
- Up to 3048 m 4
- Up to 5,000 m 11
Battery capacity
- 1 x AA 15
- 140 mAh 3
- 2 AA Batteries 4
- 2 AA Battery 2
- 2 x AAA 16
- 2 x AAA (keyboard); 1 x AA (mouse) 2
- 350 mAh 5
- 490 mAh 2
- 500 mAh 5
- 560 mAh 2
- 70 mAh 14
- AAAA battery 2
- Lithium-Ion 2
- Rechargeable Li-ion 10
- 4400 mAh 2
Battery life
- 14 Hours 2
- 14.5 3
- 14.50 Hours 12
- 17.23 3
- 17.23 Hours 6
- 19.50 Hours 2
- Up to 10 hours and 15 minutes 2
- Up to 10 hours and 45 minutes 3
- Up to 11 hours 8
- Up to 11 hours and 30 minutes 3
- Up to 11 hours and 45 minutes 11
- Up to 12 hours and 30 minutes 2
- Up to 12 hours and 45 minutes 8
- Up to 14 hours and 15 minutes 2
- Up to 8 hours and 15 minutes 9
Battery recharge
- ~ 1 hr 30 mins 1
- ISO: 225 pages, USB print 1
- Supports battery fast charge: approximately 50% in 30 minutes 22
- Supports battery fast charge: approximately 50% in 30 minutes with 65W AC Adapter 3
- Supports battery fast charge: approximately 50% in 45 minutes 14
- Supports battery fast charge: approximately 90% in less than 2 hours 5
- System in OFF or Standby Mode: 2.5 hours; System ON: 3 to 5 hours 4
- System in OFF or Standby Mode: 3 hours; System ON: 3 to 5 hours 1
- System in OFF or Standby Mode: 3.5 to 5 hours; System ON: 4 to 7 hours 1
- System ON: 2.1 hours; System OFF: 2.5 hours 1
Camera infrared
- Yes 139
Colour
- Asteroid silver 6
- Black 345
- Black, glass side panel, dark chrome logo 6
- Blue 10
- Carbon Black 7
- Grey 12
- Jack black 16
- Jet black 7
- Natural silver 13
- Pike silver aluminum 268
- Red 13
- Silver 22
- Slate Blue 30
- Turbo silver 19
- White 40
Connection type
- Micro USB 4
- Mini-phone (3.5mm) 52
- PCI Express 5
- PCI Express 2.0 x16 3
- PCI Express 3.0 2
- PCI Express 3.0 x16 2
- PCI Express x1 3
- Proprietary Interface 4
- USB 14
- USB 2.0 11
- USB 2.0 Type C 4
- USB 3.0 4
- USB 3.0 Type A 3
- USB Type A 26
- USB Type C 53
Contrast
- 1000:1 47
- 1000:1 static 3
- 1000:1 static; 1000000:1 dynamic 1
- 1000:1 static; 10000000:1 dynamic 1
- 1000:1 static; 3000000:1 dynamic 1
- 1000:1 static; 500000:1 dynamic 1
- 1000:1 static; 5000000:1 dynamic 2
- 1000:1 static; 6000000:1 dynamic 1
- 1300:1 1
- 2000:1 1
- 3000:1 6
- 3000:1 static; 10000000:1 dynamic 1
- 3000:1 static; 5000000:1 dynamic 3
- 3500:1 1
- 800:1 2
Controller type
- 12Gb/s SAS 1
- 6Gb/s SAS 1
- NVMe 16
- Serial ATA 2
- Serial ATA/600 21
Copy colour
- Yes 50
Copy resolution
- 203 x 98 dpi 1
- 300 x 300 dpi 1
- 600 x 300 dpi 6
- 600 x 600 dpi 10
- Up to 300 dpi 1
- Up to 300 x 300 dpi 14
- Up to 600 dpi 20
- Up to 600 x 300 dpi 11
- Up to 600 x 600 dpi 54
- Up to 600 x 600 dpi (flatbed) 1
- Up to 600 x 600 dpi (Flatbed), 300 x 600 dpi (ADF) 2
- Up to 600 x 600 dpi (flatbed), 600 x 450 dpi (ADF) 1
- Up to 600 x 600 dpi (flatbed); Up to 600 x 450 dpi (ADF) 6
DisplayPort
- Yes 111
Eco friendly
- Yes 501
Ethernet technology
- 10 Gigabit Ethernet 1
- 2.5 Gigabit Ethernet 1
- Ethernet 117
- Fast Ethernet 11
- Gigabit Ethernet 153
- No 1
Fax colour
- No 16
- Optional 8
- Yes 52
- Yes, black & white 2
- Yes, color 16
- Yes, mobile fax (send only) 6
Fax resolution
- 1200 x 1200 dpi 1
- 150 x 150 dpi 1
- 203 x 392 dpi or 300 x 300 10
- 203 x 392 or 300 x 300 dpi 1
- 203 x 98 dpi 13
- 204 x 98 dpi 2
- 208 x 98 dpi 1
- 300 x 300 dpi 5
- 300 x 300 dpi (no halftone) 5
- 300 x 300 dpi, 256 levels of gray 11
- Up to 203 x 392 or 300 x 300 dpi 4
- Up to 203 x 392 or 300 x 300 dpi; 256 levels of gray 2
- Up to 300 x 300 dpi 11
- Up to 300 x 300 dpi (no halftone) 3
- Up to 300 x 300 dpi; 256 levels of gray 2
Front camera
- Yes 280
Graphics memory technology
- GDDR3 33
- GDDR5 21
- GDDR6X 2
- LPDDR5 62
- DDR4 SDRAM 147
- DDR5 SDRAM 93
- GDDR6 32
- LPDDR3 1
- LPDDR4X 7
Graphics model
- GeForce RTX 3060 2
- Iris Xe Graphics 118
- Radeon 780M Graphics 3
- Radeon Graphics 108
- RTX 2000 Ada 6
- RTX 3000 Ada 4
- RTX 3500 Ada 4
- RTX A1000 4
- RTX A2000 10
- RTX A500 10
- T1000 7
- UHD Graphics 770 12
- Iris Graphics 6
- Radeon Vega 3 Graphics 8
- UHD Graphics 64
Ink type
- Dye-based 199
- Dye-based (C, G, M, pK, Y); pigment-based (mK) 1
- Dye-based (C, M, Y, pK, G); pigment-based (mK) 1
- Dye-based (C, M, Y); pigment-based (mK) 5
- Dye-based (color); pigment-based (black) 32
- Dye-based (cyan, magenta, yellow, gray, photo black); pigment-based (matte black) 2
- Latex 4
- Pigment-based 296
- Pigment-based (black and color) 12
- Pigment-based (black), dye-based (tri-color) 7
- Pigment-based (black); dye-based (color) 5
- Pigment-based (cyan, magenta, yellow, black) 2
- Pigmented—UV Curable 2
- UV-curable pigmented inks 2
- Water-based HP pigment inks and Bonding Agent 3
Media type
- Coaxial 1
- Optical Fiber 5
- Twinaxial 1
- Twisted Pair 12
Network technology
- 10/100/1000Base-T 15
- 10/100Base-TX 1
- 1000Base-T 2
- 1000Base-X 2
- 10Base-T 3
- 10GBase-SR 2
- 10GBase-T 2
- 40GBase-X 1
Operating system
- Android 17
- Chrome OS™ 16
- ChromeOS 20
- HP ThinPro 14
- macOS 56
- Windows 698
- Windows 10 Home 64 196
- Windows 10 IoT Enterprise for Thin Clients 64 15
- Windows 10 Pro 64 74
- Windows 11 Home 42
- Windows 11 Home – HP recommends Windows 11 Pro for business 14
- Windows 11 Pro 803
- Windows 11 Pro (preinstalled with Windows 10 Pro Downgrade) 173
- iOS 16
- Windows 10 IoT Enterprise 23
Pixel size
- 0.15 x 0.15 mm 1
- 0.155 mm 2
- 0.16 x 0.16 mm 1
- 0.18 x 0.18 mm 2
- 0.21 x 0.21 mm 4
- 0.23 x 0.23 mm 6
- 0.233 mm 4
- 0.248 mm 2
- 0.25 x 0.25 mm 3
- 0.27 mm 2
- 0.27 x 0.27 mm 12
- 0.274 mm 5
- 0.28 x 0.28 mm 2
- 0.31 x 0.31 mm 7
- 0.311 mm 2
Power source
- AC 1
- AC Adapter 15
- AC Power 1
- AC Supply 102
- Batteries 13
- Battery 7
- DC 1
- Power Adapter 1
- Power Supply 5
- USB 3
Processor
- AMD Ryzen™ 5 7530U (up to 4.5 GHz max boost clock, 16 MB L3 cache, 6 cores, 12 threads) 82
- AMD Ryzen™ 5 PRO 7540U (up to 4.9 GHz max boost clock, 16 MB L3 cache, 6 cores, 12 threads) 34
- AMD Ryzen™ 7 7730U (up to 4.5 GHz max boost clock, 16 MB L3 cache, 8 cores, 16 threads) 43
- AMD Ryzen™ 7 PRO 7840U (up to 5.1 GHz max boost clock, 16 MB L3 cache, 8 cores, 16 threads) 32
- Intel® Core™ i5-1335U (up to 4.6 GHz with Intel® Turbo Boost Technology, 12 MB L3 cache, 10 cores, 12 threads) 191
- Intel® Core™ i5-13500 (up to 4.8 GHz with Intel® Turbo Boost Technology, 24 MB L3 cache, 14 cores, 20 threads) 21
- Intel® Core™ i5-8250U (1.6 GHz base frequency, up to 3.4 GHz with Intel® Turbo Boost Technology, 6 MB cache, 4 cores) 20
- Intel® Core™ i7-1355U (up to 5.0 GHz with Intel® Turbo Boost Technology, 12 MB L3 cache, 10 cores, 12 threads) 173
- Intel® Core™ i7-13700 (up to 5.2 GHz with Intel® Turbo Boost Technology, 30 MB L3 cache, 16 cores, 24 threads) 33
- Intel® Core™ i7-9750H (2.6 GHz base frequency, up to 4.5 GHz base with Intel® Turbo Boost Technology, 12 MB cache, 6 cores) 24
- Core i5 96
- Core i7 123
- Ryzen 5 37
- Ryzen 5 PRO 18
- Ryzen 7 26
Processor cores
- 4 40
- 6 64
- 8 28
- Deca-core (10 Core) 163
- Hexa-core (6 Core) 69
- Hexadeca-core (16 Core) 23
- Octa-core (8 Core) 49
- Quad-core (4 Core) 28
- 2 21
- 4 53
- 6 103
- 8 72
- 12 19
- 14 51
- 16 37
Scan colour depth
- 24-bit 96
- 24-bit (8-bit for color duplex jobs) 1
- 24-bit (color) 1
- 24-bit (color); 8-bit (gray) 3
- 24-bit (color); 8-bit (mono) 1
- 24-bit (external), 48-bit (internal) 9
- 24-bit; Internal: 48-bit 6
- 24-bit/8-bit 3
- 24-bits (color); 8-bits (mono) 2
- 24-bits external 48-bits internal 5
- 30-bit 7
- 48-bit/16-bit 5
- 8-bit (mono); 24-bit (color) 4
- Internal: 30 bit ; External: 24 bit 6
Scan document feeder
- 100 sheets 1
- 35 sheets 2
- 80 sheets of 75 g/m² paper 2
- NA 2
- Not applicable 11
- Standard, 100 sheets 24
- Standard, 150 sheets 17
- Standard, 200 sheets 3
- Standard, 200 sheets (20 lb, 75 g/m²) 3
- Standard, 35 sheets 22
- Standard, 40 sheets 4
- Standard, 50 sheets 22
- Standard, 50 sheets uncurled 4
- Standard, 60 sheets 2
- Standard, 80 sheets 2
Supported device
- Audio Device 14
- Computer 22
- Desktop Computer 22
- Desktop PC 32
- Gaming Console 15
- Headset 25
- Monitor 17
- Notebook 107
- PlayStation 4 16
- PlayStation 5 15
- Printer 77
- Tablet 21
- Tablet PC 11
- Workstation 89
- Xbox One 19
USB Type-C
- Yes 239
Vendor
- Hewlett-Packard 15
- HP Inc. 3,779