Is it suitable surface Pro pen 3 ???

Yes, I purchased these for my Surface Pro 3. Two of these button cells are used for the top button to communicate via bluetooth to start OneNote. I have not had to replace these batteries yet,as the originals are still working fine. For the actual pen function an AAAA is used. Likewise I have not needed to replace the original AAAA yet and I've had my Surface Pro 3 for almost a year. Enjoy your Surface Pro 3 :)

Will they fit my Lenovo Active 2 pen??

Lenovo's lit says this is the battery for that pen

Is there an expiry date for the validity of the battery and how much the period

Yes there is a good till date on them and usually about a year

Battery ag4 code is on the battery is that 319

a size 377 battery is the equivalent of a SR626SW battery, which is also the same is a AG4 / SG4 battery.

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Power Up Your Timepieces! ⏰

⌚ VERSATILE USE - Ideal for watches, electronics, and more—never miss a moment.
🌟 TRUSTED BRAND - Join millions who trust Energizer for their power needs.
🔋 UNMATCHED QUALITY - Experience the reliability of Energizer's silver oxide technology.
📦 CONVENIENT PACK SIZE - Get 5 batteries in one pack—always have a backup ready.
⚡ LONG LASTING PERFORMANCE - Enjoy extended battery life that keeps your devices running smoothly.

The Energizer 319 (SR527SW) Silver Oxide Watch Battery pack includes 5 high-quality batteries designed for reliable performance in watches and various electronics. With a focus on longevity and versatility, these batteries ensure your devices stay powered when you need them most.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.