12.6V 2A Li-ion Charger for 18650 3S Lithium Battery Pack

12.6V DC Power Adapter — 3S Li-ion / 18650 Lithium Battery Charger

Keep your 3-cell lithium battery packs charged and ready with this compact, dependable 12.6V DC Power Adapter. Designed specifically for 3S Li-ion and 18650 lithium battery configurations, this charger delivers a stable 1A or 2A output to safely and efficiently top up your battery packs. Whether you're powering up portable tools, DIY electronics projects, robotics, e-bikes, or custom battery assemblies, this adapter is a straightforward, plug-and-go solution.

Key Features

• Output Voltage: 12.6V DC — perfectly matched to 3S Li-ion battery packs
• Output Current: 1A / 2A selectable options for flexible charging speed
• Compatible Battery Type: 18650 Li-ion cells in a 3S (series) configuration
• Compact & Portable Design: Easy to carry and store, ready wherever you need it
• Available in 4 color options — choose the one that suits your setup
• Plug-and-play operation — no complicated setup required
• Built-in protection circuitry helps guard against overcharging

What Is a 3S Li-ion Battery Pack?

A "3S" configuration means three lithium-ion cells connected in series. Each cell has a nominal voltage of ~3.7V and a maximum charge voltage of 4.2V, giving a 3S pack a full-charge voltage of 12.6V — exactly what this adapter delivers. This makes it ideal for powering drones, RC vehicles, portable power stations, LED lighting systems, and more.

What's in the Box

• 1 × 12.6V DC Power Adapter / Li-ion Battery Charger

Great For

• DIY electronics and maker projects
• 18650 battery pack assemblies
• Robotics and RC equipment
• Portable power tool battery packs
• E-bike and mobility device battery maintenance

For more information on lithium-ion battery safety and handling, visit the U.S. Consumer Product Safety Commission (CPSC) Lithium-Ion Battery Safety Center.

Frequently Asked Questions

Q: What battery configurations is this 12.6V DC charger compatible with?

A: This charger is designed for 3S Li-ion battery packs made up of 18650 lithium cells wired in series. Three cells in series reach a full charge voltage of 12.6V, which is exactly the output this adapter provides. It is not suitable for 2S or 4S configurations.

Q: What is the difference between the 1A and 2A output options?

A: The output current determines how quickly your battery charges. A 2A output charges your battery pack roughly twice as fast as the 1A option. If your battery pack supports a higher charge rate, the 2A version is the more efficient choice. Always verify your battery pack's maximum charge current rating before selecting.

Q: Does this charger have overcharge protection?

A: Yes, this adapter includes built-in protection circuitry designed to stop charging once the battery pack reaches its full 12.6V charge level, helping to protect your Li-ion cells and extend the overall life of your battery pack.

Q: Can I use this charger for other battery chemistries like LiFePO4 or NiMH?

A: No. This charger is calibrated specifically for Li-ion (lithium-ion) 3S battery packs at 12.6V. LiFePO4 and NiMH batteries require different charge voltages and profiles. Using an incompatible charger may damage the battery or create a safety hazard.