Synergy 721 (362) LR721 1.55V Alkaline Wrist Watch Batteries (Pack of 5 Batteries)

Don't go for batteries in online. This is my second worst experience. None of the batteries runs for a month at least. For everyone two weeks my watchs stops working. When replace the old battery with new one again it starts working for another 15 days. All batteries used in 2 months. If i spend that money in offline my watch would have run at least for one year. Really worst experience and waste of money.

I have recently inserted the cell so I can not say for how many days it will work.