Rechargeable Battery for TI Nspire / TI Nspire CAS, CX, CX CAS / TI 84 Plus C SE

Product Review

Over 500 KB memory for storing functions, programs, and data
Pretty Print technology displays mathematical expressions as they appear in textbooks
QWERTY keyboard and large display; real-time rotation of 3-D surfaces
Electronically upgradable using flash technology
Input/output port and cable; also supports optional TI-GRAPH LINK. The screen is black because the brightness needs to be turned up. This happens when there are no batteries inside them. Please press the second button and the arrow up or down. Please repaet this until the desired brightness is achieved