Pc21 Watch Battery

The 'pc21 watch battery' primarily refers to the 377 (SR626SW) button cell, which powers the widely used Seiko/Hattori PC21 quartz movement found in millions of budget and mid-range watches AlibabaMastersintime.

Product Insights

* Battery Specification: The PC21 movement requires a 377 / SR626SW / SG4 silver oxide cell (1.55V) MastersintimeEsslinger.

* Substitutions: While Alkaline AG4 (LR626) batteries fit, Silver Oxide (SR) is the standard for the PC21 due to its stable discharge voltage and ~2-year shelf life CalibercornerYoutube.

* Wholesale Pricing: Bulk pricing for 377 batteries ranges from $0.02 to $0.18 per unit, depending on the chemistry (Alkaline vs. Silver Oxide) and order volume AlibabaAlibaba.

Market Trends 2026

* Traditional Market Stability: The market for traditional watch batteries is estimated at $44.4 Billion in 2026, driven by consistent demand for replacement cells in established quartz movements like the PC21 Businessresearchinsights.

* Shift to Sustainability: A significant 2026 trend is the phasing out of mercury-based batteries and a move toward recyclable silver oxide chemistries to meet stricter environmental regulations Batterybusinessclub.

* Regional Dominance: The Asia-Pacific region holds over 50% market share, serving as the global hub for both movement manufacturing (Japan/China) and battery production (China/South Korea) Precedenceresearch.

* Long-Life Innovation: Manufacturers are increasingly focusing on "low self-discharge" technology for quartz movements, extending replacement cycles beyond the standard 24 months Pem-Motion.

The attached files provide a curated list of top-performing 377 batteries from verified B2B suppliers, including detailed pricing and certification data.