I just saw one buyer reply it dosen't fit 21700 battery,but you claim it fit 21700 battery,what is the truth？

It can charge 21700 batteries. The battery slot is 73mm long, and 21700 is 70mm long. 21700 batteries can be installed. You can check the video confirmation. If a buyer has written a wrong review, I hope you can help correct it and give the buyer the correct guidance. thank you!

is it including the battery?

No,it not including the battery.

Can this be plugged into a wall. Socket

It is USB charger, not DC wall charger. Unable to charge directly from the 110V power socket. It just can charge from 5V USB charging port.

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Description

🔌 Power Up Your Life—Charge Smart, Live Smart!

SAFETY FIRST - Constructed with fire-resistant materials for peace of mind.
USB CONVENIENCE - Charge anywhere with a USB interface—perfect for on-the-go professionals.
LED STATUS INDICATOR - Know your battery's status at a glance with color-changing LEDs.
CHARGE MULTIPLE BATTERIES - Simultaneously charge various Li-ion batteries with ease.
SMART CHARGING TECHNOLOGY - Automatically selects optimal current for efficient charging.

The Swanlake18650 Battery Charger is a versatile, single-slot intelligent charger designed for various 3.7V Li-ion rechargeable batteries. It features a USB interface for convenient charging, smart technology for optimal current selection, and robust safety measures to prevent overheating and overcharging.

Reviews

B**Y

Great charger

Works fast simple to use, my flashlight battery charged quickly to full voltage

20.08.2025

S**K

Easy way to recharge your battery!

Worked perfectly and a great price, too!

31.08.2025

J**D

Perfect and great price

Works well and does exactly what I need it to do! Would buy again if needed

19.07.2025

A**D

Works well enough?

The first picture is misleading as it shows a battery so we assumed it included one. That’s on us but I do wish it was more prominent in the picture to have text that says it’s not included. Our battery was quite old and it took several tries to charge it. It would show green but the battery wouldn’t function. Took about two days of taking the battery in and out of the charger for it to charge enough to use. Haven’t purchased a new battery yet to know if it’s the battery or the charger.

12.08.2025

R**R

Good value for price, charges quickly.

Needed this to keep a charge 18650 battery at the ready for a vape. It is built well enough, similar to other chargers of this type. Charges my 18650 quickly, even when I am powering it from my alarm clocks USB port. It is lightweight and travels quickly and easily if need be.Good value for the price.

14.07.2025

T**T

Works Great

I didn't know how many of these batteries existed

15.09.2025

S**D

Charges batteries like a charm.

Purchased a touch lamp and needed to charge it. Instead of purchasing more batteries. I found out the battery could be recharged. I found this battery charger. It worked! I recommend this product!

10.07.2025

R**6

Will NOT charge LifePo4 batteries!!!

Will NOT charge LifePo4 batteries!!! I purchased this charger for the sole reason of charging recovered LifePo4 26650 cells before assembling 8s8p (24v) battery packs for an off-grid solar powered shed/workshop. It's never a good idea to assemble battery packs with cells of unequal charges(unbalanced), hence charging BEFORE assembly. I planned to purchase a few more of these chargers if the LifePo4 compatibility claim was true. Although the listing clearly states this charger works with LifePo4 batteries, it's a bold faced LIE! The box and instructions have no mention of LifePo4 whatsoever, and there is no setting or indicator on the charger itself for LifePo4...NADA. I tried it anyway, because surely the listing wouldn't be a lie... Yep, it's a lie...

22.06.2025

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