TI-84 Plus CE Battery,[2026 New Upgraded] 1600mAh Fits Texas Instruments TI-84 Plus CE,TI Nspire CX/CX II、TI Nspire CX CAS/CX II CAS,P/N:P11P35-11-N01/3.7L High Capacity Battery

Battery saved at 75% (received with 75% over 2 days. My previous one lost app its charge in 2 days. Major improvement.

This battery came fully charged, which was a bit of a surprise. In my experience the unfamiliar brands of lithium ion batteries are very risky to buy. Many times they come fully discharged, and it damages this type of battery when they are kept fully discharged for prolonged time. Often they do not charge at all and I end up having to return and try a different brand. This one looks a bit cheaper than the original but it fits perfect and works perfectly. It has the same part number as the original that came in my calculator, but as the description indicates, it is higher mAh so it will last longer between charges.

Worked immediately. My graphing calculator got stuck on the reboot screen and I was terrified I’d have to buy another. I’m a broke college student and I don’t have a lot of extra money. The second I put it in the fit and turned on my calculator it works great and I’m very glad I chose this option.

Bought yesterday, I installed today into my daughter's three year old TI-84 Plus CE calculator (which was stuck in the dreaded "Validating OS" infinite loop) and it was up and running in a few seconds. You do need a micro Philips but very simple and easy to do. Also was able to update the OS with TI Connect since it was finally stable. My daughter graduates in three weeks so well worth not having to buy a new calculator just for final exams! It is important to note that if your battery is less than two years old, TI will send you a new one if you go out to their support website and submit.

My calculator wasn’t turning on. I purchased a new charging wire, but the old battery no longer held a charge. I purchased this battery and my calculator instantly turned on.