The CR2025 is the same diameter and same thickness as the DL2025 however the DL2025 is rated at 150 mAh while the CR2025 is rated at 160 mAh. The CR2025 has the higher mAh hence the longer it can hold voltage. This makes the battery last longer. However, when shopping for a battery lately, all I could find were DL batteries.
The two batteries may look the same but have slightly different power outputs. Interchanging them could damage the device by putting out to much or to little power.
First of all, it requires two batteries, not one. The part number for both batteries in 99% of the popular brands is CR2025 or DL2025.To remove the battery cap on the remote, flip the remote to the back side and place your thumb under the section closest to the keyring (not closet to the key itself, the other side. Lift this section away from the rest of the remote. Do not worry, you are not going to break it, unless you are a behemoth. Inside you will find two batteries, and yes, they are both dead.When replacing the batteries, note the tines on the top of the battery well. The batteries must be carefully placed under those tines. On not force or lift those in any way as they are the positive side of the batteries connection. Clip the rear cover back on and you have successfully completed the task. Good luck and good day.