“If you use your Canon Pixma printer for photo printing, you might have observed that the color cartridges seem to drain fast. The engineers at Canon are aware of this and have helped resolve the problem. Instead of requiring a complete ink cartridge replacement, the cartridge was designed as 2 modules: cartridge transfer mechanism and an ink tank. This is the ink tank. It’s a refill for your ink cartridge and is an economical way of adding ink without having to pay for an entire cartridge. It’s a sensible alternative.

Electronics:ChromoLife100 system: create long lasting, beautiful photos when used with genuine Canon photo paper,FINE (Full-Photolithography Inkjet Nozzle Enginering) printhead for exceptional sharpness and detail,Optimized for photographic print quality when used with genuine Canon photo papers,Ink remaining notification technology
Company:Canon(2005-07-18)
List Price:$14.25
Amazon Price:$4.50
Used Price:$13.33
Canon CLI-8Bk Black Ink Tank

“7.4v / 1000mah / Spare battery ensures uninterrupted power that prevents you from missing rare moments / Free from memory effect

Electronics:Rechargeable lithium-ion battery,Spare battery ensures uninterrupted power that prevents you from missing rare moments,Free from memory effect,Trusted Nikon quality,For use with Nikon D40
Company:Nikon
List Price:$49.99
Amazon Price:$28.99
Nikon EN-EL9 Rechargeable Li-ion Battery for Nikon D40 and D40x Digital SLR Cameras

“This cartridge is compatible with several popular Canon printers, including BJC-8200, i560 Series, i860 Series, i900D, i9100, i950 Series, i960 Series, i9900, PIXMA iP3000, PIXMA iP4000, PIXMA iP4000R, PIXMA iP5000, PIXMA iP6000D, PIXMA iP8500, PIXMA MP750, PIXMA MP760, PIXMA MP780, S800, S820, S820D, S830D, S900, and S9000. Specially designed for photo prints, the BCI-6C is easy to install and yields about 280 bright color prints.

Electronics:Replacement ink tank for many Canon BubbleJet and PIXMA printers,Vibrant cyan color,Easy to install,Produces bright color prints,Fast drying and smudge free
Company:Canon Computer Systems
List Price:$11.95
Amazon Price:$6.99
Used Price:$9.92
Canon BCI-6C Cyan Ink Tank