It sounds like you're referring to a Tianqiu 1216 battery cell, which is commonly used in **remote controls** and other small electronic devices. The **1216** is a type of **button cell battery** or **coin cell battery, which typically powers devices like remotes, watches, hearing aids, calculators, and various other portable electronic gadgets.

Here’s a bit more detail about the 1216 battery:

- Size and Type: The 1216 battery is a small, round, 12mm in diameter and 1.6mm in thickness coin cell battery.

- Chemistry: It is commonly a lithium battery, providing a stable voltage and a long shelf life.

- Common Uses: Apart from remote controls, the 1216 battery can be used in various other electronics like car key fobs, digital thermometers, and small toys.

If you're looking to buy or replace this battery for a specific device, you should be able to find it in electronics stores or online retailers. Some other common battery names for similar products might include CR1216, LR1216, or DL1216.