DIY 2S 8.4V Battery for Rechargeable Fan – Effective Lead Acid Battery Replacement!”

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🔋 Are you using a rechargeable fan that runs on a heavy lead battery, wears out quickly and takes a long time to charge?

In this video, I will guide you in detail on how to make a 2S 8.4V lithium battery pack to completely replace the lead battery in the rechargeable fan, helping the fan run more smoothly, last longer and charge faster.

📦 Video content includes:
• Introduction to the operating principle and structure of the 2S 8.4V battery
• Selection of battery cells, protection circuit (BMS) and necessary accessories
• Instructions for safe assembly and welding
• How to connect to a rechargeable fan to replace the old battery
• Test performance after completion

✅ Advantages of upgrading to lithium batteries:
• Much lighter weight than lead batteries
• Long life, less battery wear
• Fast charging time
• Safe and convenient to use

👉 If you love DIY and want to save Save on household electricity costs, don't miss this video!

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