Compatibility: Please open your calculator to carefully check the compatible battery model and part number before purchasing. Compatible with TI 84 Plus CE, TI Nspire CX II, TI Nspire CX CAS II Replacement battery, part number: 3.7L1200SPA/3.7L12005SPA, P11P35-11-N01. High quality batteries: TI 84 Plus CE replacement batteries are made of high-quality materials and circuit boards to ensure longer battery life and high performance. 3.Battery specifications: Battery type: lithium-ion battery, Capacity: 1500mAh/5.55Wh, Voltage: 3.7V, Weight: 24.7g, Size: 2.05x 1.65x 0.2inch, Color: Black. Safety protection: TI 84 Plus CE replacement battery built-in intelligent chip, with multiple protection, prevent equipment overcharge, overheating, short circuit, to ensure battery charging safety, extend battery life. Strict selection: We have a professional manufacturer, with professional production equipment, strict quality testing will be carried out during production, and high-quality batteries will be screened through layers to ensure the quality and service life of the battery. Stable performance: high charging efficiency, small self-discharge. Rechargeable batteries that can be recycled multiple times provide a reliable, long-lasting power source for your calculator.