replace battery on remote key honda accord.

I just replaced my battery with a battery from Radio Shack. Cost was $5.49 and takes about 5 minutes to take the old out and put the new one in.

part: enercell electronics

23-795 CR1616  3V

UPC code: 40293 02275

replaces: CR1616, DL1616, ECR1616

My Honda Accord 2003 Wireless remote key has a Panasonic battery:

CR1616 3U Japan 1

Is your remote going weak? It may just need a change of batteries. We carry all types and sizes of keyless entry remote battery replacements. Please select the year, make, model of your vehicle, and remote type to check the availability of batteries for your remote.

https://www.keylessride.com/order/choosevehicle.asp?make=Honda&remoteyear=2002&mode=batteries

Batteries may vary slightly from year to year, so the model year of your car is important. (You forgot to include the year in your question)

For example, here is the battery for the 2002 Honda Accord:
https://www.keylessride.com/order/relateditems.asp?vid=68245&lbfix=yes&make=Honda&remoteyear=2002&model=Accord&mode=batteries&frid=9E9B4B3D

Some keyless remotes use the above kind- 3 volts, flat and round and others use one like this:
https://www.batteries.com/productprofile.asp?appid=262757

Your Honda Dealer will have just the right battery and if you buy it from them, they will put it in for you!