LiitoKala Lii-King4000 Rechargeable 18650 Battery 4000mAh

Keep your devices running longer with a rechargeable 18650 battery built for steady, dependable power.

When your flashlight, speaker, recorder, or other essential gear needs lasting energy, this 4000mAh cell gives you the runtime you want without constant swapping.

Reliable power for demanding everyday devices

✅ Get extended runtime so your devices stay ready longer between charges

✅ Keep performance steady with stable voltage for smoother everyday use

✅ Recharge up to approximately 1100 times when cared for properly

✅ Fit most standard 18650-compatible devices with the 18.3 × 65.05mm size

✅ Use one cell across flashlights, Bluetooth speakers, dash cameras, POS machines, handheld massagers, and beauty tools

✅ Maintain stronger current flow with internal resistance under 16mΩ

✅ Rely on 3.7V nominal power and a full charge of 4.2V for consistent operation

Built for daily use, this battery keeps energy flowing smoothly through high-drain devices. That means fewer interruptions when you're out on the trail, at home, or handling work tools that need dependable power.

Its rechargeable design makes it a practical choice for repeated use, while the standard 18650 size keeps it easy to match with compatible gear. The stable output also matters when you want your devices to perform consistently instead of dropping off too soon.

Keep your gear powered longer.

Simple power for compatible devices.

Steady output keeps use more predictable.

Stay prepared with backup energy on hand.

Rechargeable use lowers replacement frequency over time.

Ideal when your gear needs longer-lasting power.

Use a protected lithium charger for safer charging.

Consistent discharge supports reliable day-to-day use.

Store it cool and dry for better long-term care.

Choose dependable rechargeable power and keep your devices performing longer.