Okay first you split it there should be a line all the way around. You spilt it open and than you see the battery take the battery out and put the new one in.
The following applies to a 2008 MX5 Advanced keyless entry remote.
Pull out the embedded key from the lower right corner of the remote.
Use a tiny precision screwdriver to pry out the flap located at the lower left
corner. This exposes the battery. Stick a paperclip in behind the battery and pry out.
It takes a 3 volt CR2025 battery. (panasonic number) Pay attention to + mark on the
cover flap.
BIUSXX
use a hammer..:)
change the battery in the remote you can test your remote at auto zone for free
Change battery at official dealer.
There's a signal transmitter inside the key which needs power. Change the battery.
To change the remote key battery for a 2004 S350, first, locate the small notch on the key fob and use a flathead screwdriver to gently pry it open. Once opened, remove the old battery, typically a CR2025, and insert the new battery, ensuring the positive side is facing up. Snap the key fob back together and test the remote to ensure it works properly.
There is nothing to reset. Just change the battery and if you have it in correctly it will work.
The Honda Accord remote key does have a battery.
On Volvo S40 2004 onwards, when the remote key battery voltage is low a text message is displayed in driver's information message screen that the remote key battery voltage is low which means the remote key battery should be replaced. .ab.
Take it to Wal*Mart, they can change it at the watch (jewelry) counter.
To change the battery in the Mini Cooper keyless remote, it is necessary to first open the device. This can be done by removing the key chain and gently prying the seam at the opening end apart. Now the battery is accessible for easy replacement.
The battery in your key fob has a very low charge .Change battery as soon as possible.