Battery Replacement For Texas Instruments TI-84 Plus CE C Graphing Calculator, TI NSpire CX/CX II/CX CAS, P11P35-11-N01 & 3.7L12005SPA Battery, Fix Low Dead Power Issue & Error Validating OS Startup
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Battery Replacement For Texas Instruments TI-84 Plus CE C Graphing Calculator, TI NSpire CX/CX II/CX CAS, P11P35-11-N01 & 3.7L12005SPA Battery, Fix Low Dead Power Issue & Error Validating OS Startup

|23 ratings

Key item features

  • Problem Solution: Addresses common calculator power issues like dead batteries, frequent recharging, and "validating OS" error messages, restoring calculator functionality.
  • Broad Compatibility: Specifically designed for Texas Instruments TI-84 Plus/CE/C Silver and TI Nspire CX/CX II/CX CAS models, compatible with battery part numbers 3.7L1200SPA/5SPA/5SPB and P11P35-11-N01.
  • Enhanced Capacity: Features an extended 1500mAh capacity, providing increased battery life and reducing the frequency of recharges compared to original batteries.
  • Effortless Installation: Facilitates a simple DIY repair with included screwdriver and cushion pads, ensuring a perfect fit and immediate plug-and-play operation.
  • Reliable Power: Offers stable charging efficiency and low self-discharge, providing a dependable, long-lasting, and recyclable power source for your calculator.
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23 ratings7 reviews
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Showing 1-3 of 7 reviews

Sep 19, 2026
Reviewer name: anonymous
Sold and shipped byPerfectESell
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy and Affordable

Great and easy to install. My calculator started malfunctioning, not charging and turning on and off. I wasn't ready to spend another hundred dollars on a new calculator, so this was just what I needed. My calculator is back to normal now.

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Helpful?7BN2BMJ4N3OO17717162227
Oct 1, 2025
Reviewer name: Melissa
Top Reviewer
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5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Chemistry class a must have !

The only issue was the battery didn't work . I recommend ordering a separate battery when you purchase . My son's teacher recommended this for his chemistry class . My son said it's very helpful for his assignments.

Helpful?7BN2BMJ4N3OO17717162227
Jan 24, 2026
Reviewer name: Ava
Sold and shipped byPerfectESell
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Good price

Super cheap for a battery compared to if I had to replace the entire calculator itself, which would cost 10x the price for the battery. Comes with little screw driver to take the back plate off the calc as seen in picture. Fixed my problem and it was cheap thx :3

Helpful?7BN2BMJ4N3OO17717162227
Current price is $12.99
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4.363128491620111 out of 5 stars
4.4 stars out of 5, based on 179 seller reviews(4.4)
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Free Holiday returns until Jan 31