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323450 3.7V Li-ion Polymer replacement battery for Sony Walkman MP3 players, horizontal front view showing battery surface with red and black wires
323450 3.7V Li-ion Polymer replacement battery for Sony Walkman NW-E393, vertical front view showing battery label and wire orientation

323450 3.7V Battery for Sony Walkman NW-E393 E394 E395 A816 A815 E453 MP3 Replacement

Original price was: $12.99.Current price is: $9.99.

🔘 323450 3.7V | 🔋 Li-ion Polymer | 🎧 For Sony Walkman NW-E393 E394 E395 A816 E453 MP3

8 in stock

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SKU: 323450 Category: Tags: , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo 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 and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Bulgaria, Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 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.

🇪🇺 Note for EU countries: Due to new EU customs regulations effective July 1, 2026, a flat tariff fee of $4.00 (approx. €3.50) applies to shipments to EU countries. This fee covers customs tariff, handling, and payment processing costs, and will be added at checkout. Thank you for your understanding.

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Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ High Capacity – Restores full playback time for Sony Walkman MP3 players

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty from delivery – Longer coverage than major platforms

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: 323450 (also known as US323450 A7H, compatible with 323449)
Capacity: 700-760mAh / approx. 2.6-2.8Wh
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Battery type: Li-ion Polymer (Grade A cells)
Connection type: Red and black wires (no pre-attached connector)
Dimensions: approx. 3.2mm (thickness) × 34mm (width) × 50mm (length)
Compatible with: Sony Walkman NW-E393, NW-E394, NW-E395, NW-A816, NW-A815, NW-E453, NW-A806, NWZ-A845, NW-A840, NW-A844, NW-E463, NW-E353, NWZ-S755, NWZ-S764, NWZ-S645, NWZ-S738F, NWZ-A726, NWZ-A8, NW-A728, and other models using 323450 battery
Package include: 1 x battery
Restore the original playback time of your Sony Walkman MP3 player with this 323450 3.7V replacement battery. The 323450 is a widely used lithium-polymer battery found in numerous Sony Walkman models from the A, E, S, and Z series. After years of use, the original battery capacity naturally degrades, resulting in shorter playback times, frequent charging, or the device failing to power on. This Li-ion Polymer battery restores the full capacity, bringing back the reliable performance your Walkman was designed for. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Designed for Easy DIY Replacement: This battery comes with red and black wires (no connector pre-attached), matching the original connection style used in most Sony Walkman models. The 323450 format — approximately 3.2mm thick × 34mm wide × 50mm long — is a compact pouch cell specifically designed for portable media players. For a successful replacement: 1) Open the Walkman case following a disassembly guide. 2) Desolder or cut the original battery wires (note polarity: red = positive, black = negative). 3) Solder the new battery wires to the corresponding pads on the circuit board. 4) Secure the new battery in the compartment and reassemble the device. If you’re not experienced with soldering, professional installation is recommended. Common symptoms that indicate battery replacement is needed include: the device requiring frequent charging, shutting down shortly after being unplugged, refusing to power on, or showing a significantly reduced playback time. This replacement restores the original battery performance, extending the useful life of your Walkman without the cost of a new device.
Compatibility Note: Fits Sony Walkman NW-E393, NW-E394, NW-E395, NW-A816, NW-A815, NW-E453, NW-A806, NWZ-A845, NW-A840, NW-A844, NW-E463, NW-E353, NWZ-S755, NWZ-S764, NWZ-S645, NWZ-S738F, NWZ-A726, NWZ-A8, NW-A728, and other models that use the 323450 battery format. Please confirm your original battery dimensions and connection type before ordering.

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Frequently Asked Questions

The 323450 3.7V battery for Sony Walkman is compatible with a wide range of models including Sony NW-E393, NW-E394, NW-E395, NW-A816, NW-A815, NW-E453, NW-A806, NWZ-A845, NW-A840, NW-A844, NW-E463, NW-E353, NWZ-S755, NWZ-S764, NWZ-S645, NWZ-S738F, NWZ-A726, NWZ-A8, and NW-A728. If you need a Sony Walkman battery replacement for NW-E393 or NW-A816, this 323450 3.7V battery is the correct match. For 323450 battery for Sony NW-E394 compatibility, please check your original battery dimensions (approx. 3.2×34×50mm) and connection type (red and black wires, no connector). This battery is NOT compatible with newer Sony Walkman models that use different battery formats. If your Sony MP3 player battery drains quickly or won't hold a charge, this 323450 replacement battery will restore full playback time.

The 323450 3.7V battery for Sony Walkman has a capacity of approximately 700-760mAh (2.6-2.8Wh) and a charge limit of 4.2V. This 323450 3.7V Li-ion Polymer battery for Sony MP3 players is built with grade A cells and is CE, RoHS, and UN38.3 certified. For Sony NW-E394 battery life after replacement, expect approximately 15-25 hours of MP3 playback depending on the model and usage. The Sony Walkman 323450 battery performance provides excellent endurance for daily listening. Charging the battery to full takes approximately 2-2.5 hours with a standard USB charger. For best performance, allow 2-3 full charge cycles after installation to calibrate the battery meter. If your original battery now requires daily charging or the device shuts down shortly after being unplugged, this replacement will restore the original battery life.

Replacing the Sony Walkman 323450 battery requires soldering. For Sony Walkman battery replacement guide: 1) Open the device case following a disassembly guide for your specific model. 2) Locate the existing 323450 battery. 3) Desolder or carefully cut the original red (positive) and black (negative) wires. 4) Solder the new battery's red wire to the positive pad and black wire to the negative pad on the circuit board. 5) Secure the new battery and reassemble. For 323450 battery installation Sony NW-A816, note the correct polarity before soldering — incorrect wiring will damage the device. If you are not experienced with soldering, professional repair services are recommended. For Sony Walkman battery health maintenance: 1) Avoid completely draining the battery regularly — recharge when the battery indicator shows low. 2) Store the device at approximately 40-60% charge if not used for extended periods. 3) Avoid exposing the device to high temperatures (above 40°C / 104°F). 4) Use a standard USB charger (5V/1A) for optimal charging. For Sony MP3 player battery care tips, stop using immediately if the battery shows any swelling.

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