Wish to know age and battery requirement of pulsar vx42e -x201 men’s 10bar watch

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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It is French.

The value of a Pulsar watch can vary depending on several factors, such as its condition, age, and model. The Pulsar 160622 watch is a vintage watch and the value of it would depend on the condition of the watch. A watch in excellent condition with all of its original parts and paperwork would be worth more than one that is damaged or has been modified.
It's also worth noting that Pulsar watches were first produced in the 1970s, so the age of the watch is also a factor in determining its value. Watches that are older and in good condition can be considered collectible and therefore be worth more.
It's difficult to give you a specific value without seeing the watch and knowing its condition, but I suggest checking with a reputable watch dealer or watch appraiser for an accurate value. Also, you could check online marketplaces like Ebay, Amazon, or Chrono24.com to see prices of similar watches being sold, but keep in mind that prices can vary depending on the condition and location.

It looks like the Pulsar model number 161392 is a men's watch with a stainless steel case and bracelet, and a black dial. The watch has a Japanese quartz movement and a date function. It is water resistant up to 50 meters. It is a classic, stylish timepiece that would make a great addition to any collection.The value of a watch can depend on a variety of factors, including its age, condition, rarity, and demand. In general, Pulsar watches are considered to be affordable and are not considered to be high-end luxury timepieces. However, the value of any particular watch can vary depending on the specific model and its individual characteristics.

Question edited for clarity, 'make model (what it is)' in all questions please.

Have a read of this Tip I wrote.

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

https://www.google.com/search?q=Pulsar+V732x174+battery

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It depends on the model, age and condition it's in.

https://picclick.co.uk/Pulsar-Ana-Digi-Gold-Tone-Watch-V031-5080-302636375150.html

Watch for sale dated November 1985.

Mens Pulsar Ana Digi Watch v031-5080 - Gold Tone - Spares or Repairs

Super condition gold tone ana digi watch
Build date Nov 1985 (see code on photos)

Very light wear, nice clean crystal, case and original Pulsar strap - see photos

Worked perfectly up until a few months ago - then 'had a moment', started flashing, then died and refused to fire up again - this watch is currently not working

Battery swapped out for a brand new Renata (incl) but still no joy

Watch has not been wet nor has there been any battery leakage - so unsure of the fix - or the reason for its inop

As such being sold as spares or repairs - if you have a spare movement to drop in then you would have very desirable, rare Pular (by Seiko) ana digi watch - a really nice clean piece from the '80's

Too good just to leave in a drawer so one for the collector, restorer/repairer or those looking for a very clean cased donor watch to drop in a working mech

Thanks and happy bidding

Please check out my other watches

Click on the crown (the stem in the middle on the right side). There are three settings, and one of them will change the minute hands' behavior to normal. You might also check out this guide:

http://c01.coacdn.com/calibers/H800_condensed.pdf

D you mean battery drain, not gain? Possible other causes are: Maybe you got an old battery put in, this does happen sometimes. Or, maybe the lubricants have dried out causing the gears to get sticky/gummy and causing excessive battery drain. I use an instrument than spin the movement and loosen up sticky gears after using a spray cleaner.

I have a similar solar modle Ive had since 1995 , about 4 years ago it started loosing time and the second hand started double ticking. I sat it down out side on a cool summer day for the hole day in the bright sun and never have had a problem since. knock on wood! It was also runover by a car last year and still works good. I wont ever get ride of it. Hopefully this helps u guys out