Description
Battery model: LIR1240 (compatible replacement for CP1240)
Quantity: 2 batteries per pack
Capacity: 55mAh per battery
Nominal voltage: 3.6V
Full charge voltage: 4.2V
Dimensions: 12 × 4mm (coin cell)
Weight: approx. 2.8g per battery
Battery type: LIR (Rechargeable Li-ion coin cell)
Compatible with: Sony WF-LS900N, WF-LS900B, WF-1000XM5, WF-1000XM4, LinkBuds S, LinkBuds Fit, LinkBuds, and other TWS earphones using CP1240/LIR1240 batteries
Package include: 2 x batteries
Revive your wireless earbuds with this 2-pack of LIR1240 55mAh rechargeable batteries. Compatible with Sony WF-LS900N, LS900B, WF-1000XM5, WF-1000XM4, and LinkBuds S — these 12×4mm coin cells are a direct replacement for CP1240 batteries. Each LIR1240 battery delivers stable 3.6V power to restore long-lasting playtime and talk time. Built-in safety protection against overcharge and over-discharge. Made with grade A cells. CE, RoHS, and UN38.3 certified for safety compliance.
Compatibility Note: Fits TWS earbuds and charging cases that use 12×4mm rechargeable lithium coin cells with CP1240 or LIR1240 specifications. Common compatible models include Sony WF-1000XM5, WF-1000XM4, LinkBuds S, LinkBuds Fit, and WF-LS900N. Professional installation recommended — soldering required.
Battery Care Tips for TWS Batteries: Use a compatible 4.2V Li-ion charger. Avoid over-discharge (keep above 2.5V). If swelling occurs, stop use immediately. For best results, replace both earbud batteries at the same time for balanced performance.
✅ Condition: Brand New – Never used, factory-tested quality
✅ 2 Batteries per Pack – Replace both earbuds
✅ 55mAh LIR1240 – Replaces CP1240 directly
✅ CE / RoHS / UN38.3 Certified – Safety tested
✅ 90-Day Warranty – Hassle-free replacement
✅ Ships in 3-7 days with tracking – Fast delivery
🛡️ Shipping Protection Available at Checkout – Covered against loss, damage, or theft
✅ PayPal Buyer Protection included – Secure checkout
⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.
✅ Why Our Warranty Stands Out
Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.
| Compare | ✅ Qingsm Tech | ⚠️ eBay / AliExpress |
|---|---|---|
| Warranty Period | 90 days from delivery | 15-30 days from order confirmation |
| When It Starts | 📦 Upon delivery | ⚠️ Upon order confirmation (even before you receive it) |
| Claims Handling | We do it directly — email us | Automated dispute system, seller dependent |
| After Window Expires | Still can contact us for support | No recourse, seller can ignore you |
🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.
📦 Shipping Cost & Delivery Time ( Economy Shipping from China )
📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates; actual delivery may be affected by customs, weather, or other unforeseen circumstances.
| Destination | Freight (USD) | Est. Delivery Time |
|---|---|---|
| United States | $7.80 | 8-20 days |
| Canada | $6.80 | 18-45 days |
| Mexico | $10.00 | 30-60 days |
| Germany, France, United Kingdom, Greece | $6.50 | 18-45 days |
| Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus | $8.00 | 18-45 days |
| Croatia, Finland, Lithuania, Latvia, Slovenia | $8.00 | 30-60 days |
| Romania | $14.00 | 30-60 days |
| South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan | $7.50 | 18-45 days |
| United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil | $18.00 | 25-60 days |
* Delivery times are estimates; actual delivery may be affected by customs or other factors. If your country is not listed, we are currently unable to ship batteries to that destination.
🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient’s CPF, as it is required for Brazilian customs and shipping. Thanks ! We appreciate your understanding.
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