Renata 379 SR521SW Batteries - 1.55V Silver Oxide 379 Watch Battery (2 Count)

$13 for 20 batteries 379 is good buy. Put 1 of them in my watch and it works great! SWISS MADE👍

Perfect for my watch.

The battery was delivered the next day. It fit perfectly in my Bulova ladies watch 98V02. The original battery was marked SR521SW. This tiny battery was an exact fit. The watch is working great and keeping time. The original battery lasted 2 years. I will update if this fails prematurely. It’s November 20, 2025.

Swiss made batteries builds confidence in manufacturing quality Lack of expiration date makes freshness suspect.

I bought this battery for my old DKNY watch and it works and accurate.

Great price, received sooner than expected & seller even provided an invoice, which Amazon nor other sellers bother to do anymore. I'll definitely be a repeat customer!

Worked great for a Pulsar watch

These watch batteries fit perfectly, and restored normal operation to a pair of watches that I was asked to fix. Just make sure the battery number matches the one in your watch before you order, and be careful and patient when opening the watch and changing the battery, to avoid doing any damage.

Reliable and long‑lasting 👍 This Renata 379 (SR521SW) battery fits perfectly and powers my device exactly as expected. Easy to install and has held up well so far — great value for a genuine replacement battery. Highly recommend.

A+

It is also a size AG0 or 521. My digital multimeter showed them as 1.57v. Best before date of Feb 2028.

Meine Quarzuhr läuft wieder, wie lange, wird sich zeigen...

Las compré por marca y porque me salía más barato que mandar a cambiar las pilas, al relojero