402040 Lithium Battery

402040 Lithium Battery – 3.7V rechargeable Li-ion polymer battery, designed for slim and compact electronic devices requiring reliable power.

• 🔋 Size: 4.0 × 20 × 40 mm
• ⚡ Stable 3.7V nominal voltage
• 🛡️ Optional built-in protection circuit for safety
• 📱 Suitable for wearable devices, Bluetooth headsets, and mini trackers