VINTRONS Li-ion BATTERY Pack Fits Texas TI-Nspire CX CAS, Instruments TI-Nspire CX, 3.7L1060SP, 1815 F071D Capacity: 1300mAh / 4.81Wh Type: Li-ion Volts: 3.7V Size : 53.04 x 48.22 x 4.80mm VINTRONS Brand High QualityTI-Nspire CX CAS Replacement Battery