I have a pulsar watch Y960-6018(A5)what is the replacement battery please

that looks like a serial number. The 266th watch made in 1978.

Pulsar seem to use a few different batteries.

https://www.google.com/search?q=Battery+for+Pulsar+men%27s+watch+780266

This is the best advice

https://www.fixya.com/support/r27181038-changing_watch_batteries

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This site will be helpful for your concern about the battery replacement http://www.time-repairs.com/watchrepair/w4-3.htm

Hope that helps........

Check out these sites....

https://www.google.com/search?q=vd53-x001+battery+replacement

Takes CR2032 3V Lithium Battery.

Best advice
https://www.fixya.com/support/r27181038-changing_watch_batteries

That model number doesn't follow Pulsar's model numbering scheme and is likely a serial number.

The stock answer is the same battery as the one that is in it.

https://www.google.com/search?q=Pulsar+watch+660137%2C+replacement+batteries

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Clearly, it is faulty and has some type of parasitic drain. All watch batteries should last a couple of years. My Seiko last for about 3 to 4 years. Return it to Pulsar or a repair agent for repair.

Pulsar Watches - Tell it your way

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https://www.pulsarwatches-europe.com Pulsar burst onto the world watch scene with the first ever LED watch. Ever since, the name has been synonymous with adventurous and leading edge design.

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The VX82 X530 battery is a replacement battery for the Pulsar watch. It is a lithium-ion battery with a capacity of 3.7V and 530mAh. It is important to note that you should only use a battery that is specifically designed for your Pulsar watch, as using the wrong type of battery can damage the watch or be potentially dangerous. Always use caution when changing a watch battery.

Yyou can try searching for "VX82 X530 replacement battery" or "Pulsar watch battery replacement" on online retailers such as Amazon, eBay, or Alibaba. You may also check with the manufacturer of your Pulsar watch or a local watch repair shop for replacement options.

Stop panicking, please. If you lost the battery, that means your watch has been opened, so, read the movement number and submit here. Then Ill be able to give exact battery number.

Do not panic yet - all you need is the battery replacement.
Don't mind that the watch is less than a year old - it may laid in sellers store for a year or so and as the watches are not refitted with the brand new battery at the selling point, they may have underpwered battery much more quicker than you expected
Find your nearest watch repair shop and ask for battery replacement. Your watch will tick as brand new and will last much longer then before.

Do not forget to rate, please.

Take the watch to a jewlers, let him replace the battery they usually only charge for the new battery,
and they do not cost much.