Amazon.com: BCXY Extra Longer Capacity Replacement Battery for Texas Instruments Select TI-Nspire CX, TI Nspire CX, TI Nspire CX CAS Graphing, TI-84 CE, TI-84 Plus CE, TI-Nspire CX CAS : Electronics
TI Nspire CX CAS (Black) & CX CAS II (Blue) Battery Size Comparison. 1060mAh, larger, and heavier vs. 1,200mAh, smaller, and lighter. Battery tech has advanced. : r/calculators