TI-Nspire series - Wikipedia The TI-Nspire CX series differ from all previous TI graphing calculator models in that the CX series are the first to use a rechargeable 1,060 mAh lithium-ion battery (upgraded to 1,200 mAh in the 2013 revision)
Texas Instruments TI-Nspire CX II CAS Handheld Graphing Calculator Dynamic graphing with full-color display, TI Rechargeable Battery and licensed TI-Nspire™ CX Student Computer Software Faster performance, added interactive visuals and easier-to-read graphics expand the TI-Nspire™ CX graphing calculators’ classroom-proven ability to support inquiry and discovery