Sinowatt 25SP 2500mAh 18650 20A Battery

Overview

The Sinowatt 25SP is a rechargeable 18650 lithium-ion cell with a nominal 2500mAh capacity and a 20A maximum continuous discharge rating. As a genuine Sinowatt cell, it is sold as a flat-top battery and is commonly positioned for high-drain applications that need a compact, dependable power source. The 3.6V nominal voltage and 4.2V peak charge voltage align with standard 18650 lithium-ion formats, making it suitable for compatible single-cell and multi-cell devices. Retail listings from specialist battery sellers describe it as an original Grade A cell rather than a rewrap, with dimensions around 18.45mm x 65.2mm and no built-in protection circuit. This battery is designed for users who need a balance of capacity and current delivery in a familiar 18650 size. Always match the battery to the device’s power requirements and use an appropriate charger for lithium-ion cells.

Key Features

• 2500mAh nominal capacity
• 20A maximum continuous discharge
• Standard 18650 size
• Flat-top cell design
• Rechargeable lithium-ion chemistry
• 3.6V nominal voltage
• 4.2V maximum charge voltage
• Original Sinowatt manufactured cell

Specifications

• Brand: Sinowatt
• Model: SW18650-25SP / 25SP
• Battery Size: 18650
• Capacity: 2500mAh
• Continuous Discharge: 20A
• Nominal Voltage: 3.6V
• Maximum Voltage: 4.2V
• Style: Flat Top
• Protection: No
• Approximate Dimensions: 18.45mm x 65.2mm

Compatibility

• 18650-compatible devices requiring a flat-top cell
• High-drain battery applications within rated limits
• Suitable for matched multi-cell packs

Package Contents

• 1 x Sinowatt 25SP 2500mAh 18650 Battery

Usage Guidance

• Charge only with a suitable lithium-ion charger.
• Do not exceed the stated discharge rating.
• Use only in compatible 18650 battery compartments.
• Inspect the wrapper before first use.

Frequently Asked Questions

Is this a protected battery?

No, this is an unprotected 18650 cell.

Is the battery flat top or button top?

It is a flat-top cell.

What is the nominal voltage?

The nominal voltage is 3.6V.