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The TI-84 Plus CE only has a mini-USB port (in contrast, the TI-84 Plus also has an I/O port). The color display on this TI-84 Plus CE is much bigger (320 x 240 pixels). Its CPU is three times faster, thus a quicker processing time. The TI-84 Plus CE uses a rechargeable battery (designed to last around two weeks on single charge) instead of AAA batteries (as used by the TI-84 Plus). The TI-Nspire CX CAS only has a mini-USB port that allows the user to interface with a computer. The calculator is powered by a rechargeable Lithium-ion battery that should last two weeks on a single charge. Its display (320 x 240 pixels) gives the user the visual quality of 1st generation smartphones. It has a high-powered CPU for crunching the most complex task. The TI-Nspire CX CAS is the luxury item in the Texas Instrument graphing calculator line-up. The TI-89 has two to access it: (1) I/O port and (2) mini-USB port. Both calculators need four (4) AAA batteries for power. The display (160 x 100 pixels) is bigger and allows the user to see the plots much better. Its CPU processes much more data at a faster speed.

The TI-89 is major upgrade over the TI-83 Plus. The TI-84 Plus CE only has a mini-USB port (in contrast, the TI-83 only has an I/O port). This feature allows the user to see a graphing request in better detail. The color display on this TI-84 is much bigger (320 x 240 pixels).

Its CPU is three times faster than the TI-83 Plus CPU. The TI-84 uses a rechargeable battery (designed to last around two weeks on single charge) instead of AAA batteries. The TI-84 Plus CE has slimmer body than the TI-83 Plus. Both calculators have an I/O port but the TI-84 Plus also includes a mini-USB port. The devices also are powered by four (4) AAA batteries. The processor on the TI-84 has a faster clock (operates at 15 MHz instead of 6 MHz (TI-83 Plus)), therefore it should process requests a little faster. Both calculators use the same type of central processing unit (CPU) (Zilog Z80), and the displays are the same (96 x 64 pixels). In fact, the only difference is that the TI-84 has a mini-USB port while the TI-83 does not. Physically, the TI-83 Plus and the TI-84 Plus are similar.