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8000mAh 3.7V Li-ion battery with protection board and pre-attached wires, 77x39x19mm size, front view on white background
8000mAh 3.7V Li-ion battery dimension drawing showing length 77mm, width 39mm, height 19mm, with pre-attached wire positions

8000mAh 3.7V Battery with Protection Board & Wires, 77x39x19mm Size

Original price was: $19.99.Current price is: $16.99.

🔘 8000mAh 3.7V | 🔋 Li-ion | 📦 77x39x19mm | ⚡ Built-in PCB & Pre-attached Wires

8 in stock

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SKU: 8000mAh-3.7V Category: Tags: , , , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ 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 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.

🔋 Can't find your battery model? Use our FREE Battery Lookup Service – tell us your device and we'll find a match within 24 hours. 👉 battery.qingsm.tech/find-my-battery

Description

Battery capacity: 8000mAh / 29.6Wh
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Discharge cut-off voltage: 2.75V
Discharge current: 4A (maximum)
Charging current: 0.5C (recommended)
Dimensions: 77 × 39 × 19 mm
Weight: 124g
Service life: 500 cycles (retain 85% capacity)
Battery type: Li-ion (Rechargeable)
Package include: 1 x battery, pre-attached wires
Power your custom DIY projects with this high-capacity 8000mAh 3.7V Li-ion battery. This universal battery features a built-in protection circuit board (PCB) and comes with pre-attached wires, making it ready for easy integration into various electronics, portable devices, and backup systems. The compact dimensions of 77x39x19mm offer design flexibility for hobbyists and makers. Built-in protection guards against overcharge, over-discharge, and short circuits, ensuring both battery and device safety. The battery supports a maximum discharge current of 4A and can withstand discharge temperatures from -20°C to 60°C. This versatile battery is an ideal power source for DIY electronics, portable speakers, LED lights, Arduino projects, robotics, and IoT devices.
Compatibility Note: This is a universal battery for DIY projects. Please verify your device’s voltage requirements, connector type, and battery compartment dimensions before purchasing. The pre-attached wires measure approximately 50mm in length.
Battery Care Tips: Avoid full discharge (keep above 2.75V). Use a compatible 3.7V Li-ion charger (0.5C recommended). Do not exceed 4A continuous discharge. Store in a cool, dry place when not in use. If swelling occurs, stop use immediately.

✅ Condition: Brand New – Never used, premium quality

✅ Built-in Protection Board – Overcharge / Over-discharge / Short circuit protection

✅ Pre-attached Wires – Ready for easy installation

✅ 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.

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Frequently Asked Questions

This 8000mAh battery measures 77mm × 39mm × 19mm (Length × Width × Height). If you're looking for a high-capacity universal battery for your DIY project, please measure your battery compartment to ensure it fits. The battery comes with pre-attached wires for easy connection.

This 3.7V Li-ion battery has a maximum continuous discharge current rating of 4A. If you need a power source for portable electronics or LED lights, please ensure your device's power draw does not exceed 4A. The battery features a built-in protection board for added safety.

Yes, this 8000mAh battery comes with a built-in protection circuit board (PCB) that safeguards against overcharge, over-discharge, and short circuits. The pre-attached wires make it ready to use for Arduino projects, robotics, IoT devices, and other DIY electronics. No soldering is required for basic connection.

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This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

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