5S 4Amp Type-C Li-ion Battery Charger Module – Charge 21V Battery with Mobile Charger

Charge 21V Drill Batteries with a Phone Charger!

• Are you struggling to find a charger for your 18V or 21V battery pack? The 5S Type-C Li-ion Battery Charger Module is the smartest solution for you.
• This compact board allows you to charge a 5-Series (5S) Lithium-ion Battery Pack directly from a standard Type-C USB Charger. It features a powerful boost converter that takes 5V input and steps it up to 21V to charge your battery safely.

Why is this Module a Must-Have?

1. No Need for Expensive Adapters Forget about bulky 21V adapters. Just use your Android phone’s cable to charge your high-voltage projects.
2. Perfect for Cordless Drills Most cordless drills use a 5S (18V-21V) battery pack. This module is perfect for making a custom charging port for your drill.
3. Intelligent Boost Technology It automatically converts low voltage (DC 3-6V) into the precise 21V required for 5S batteries.

4. LED Status Indicators

• CR LED (Charge): Shows the battery is charging.

• OK LED (Full): Shows the battery is fully charged.

Technical Specifications:

• Input Interface: USB Type-C
• Input Voltage: DC 3V – 6V (Recommended: 5V 2A or 3A Charger)
• Output Voltage: 21V (Dedicated for 5S Battery Pack)
• Internal Switch Current: 4A (Max Boost Capability)
• Chipset: IP2312 (High Efficiency)
• Battery Type: 3.7V 18650 / Polymer (5 Batteries in Series)
• Size: Compact and easy to fit in cases.

Connection Guide:

• Input: Plug in a Type-C USB Cable.

• Output (BAT+): Connect to the Positive (+) of the 21V Pack.

• Output (BAT-): Connect to the Negative (-) of the 21V Pack.

⚠️ Important Note: Since this module boosts 5V to 21V (a 4x increase), the charging speed depends heavily on your mobile adapter. Please use a good quality 5V 3A adapter for the best speed.