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Lithium Polymer Battery Pack
Created with Pixso. CE Certified 3.7V 400mAh Lithium Polymer Battery 402540 Lipo Battery

CE Certified 3.7V 400mAh Lithium Polymer Battery 402540 Lipo Battery

Brand Name: Vats Battery
Model Number: 402540
MOQ: 3 pcs
Price: $0.98~1.5
Delivery Time: 7 work days
Payment Terms: T/T
Detail Information
Place of Origin:
China
Certification:
CE
Product Name:
Polymer Lithium Battery
Model:
402540
Application:
Humidifier, Beauty Instrument
Capacity:
400mAh
Voltage:
3.7V
Certification:
CE
Charging Voltage:
4.2V
Std. Charging:
0.2C
Supply Ability:
Ships in 7 Work Days (In-Stock) / 30 Work Days (Out-of-Stock)
Highlight:

CE certified Lipo battery 3.7V

,

Lithium polymer battery 400mAh

,

402540 Lipo battery with warranty

Product Description
Rechargeable 402540 Lithium Polymer Battery 400mAh for Humidifiers

Engineered with high-quality LiPo cells, the 3.7V 400mAh 402540 lithium polymer battery provides consistent performance for beauty tools, mini humidifiers, massage devices, and handheld gadgets. The CE certification guarantees safety and durability, while its compact structure supports easy installation in small electronic devices. Its stable discharge rate and long-lasting energy storage make it ideal for continuous and portable applications.

Key attributes
Battery Size 4*25*40mm
Application Toys, Home Appliances, Consumer Electronics
Model Number 402540
Place of Origin Guangdong, China
Brand Name VATS Battery or Netural
Weight 8g
Type Li-polymer
Warranty 12 Months
Maintenance 10 Years
Std.working 0.2C
Max continuous discharge 1.0C
Charging Voltage 4.2V
Keywords lithium polymer battery lipo battery 3.7v 400mah
PCB protection(optional) over-charge/over-discharge/short-circuit, over-temperature
OEM/ODM Warmly Welcomed
Brand VATS
Packaging and delivery
Selling Units Single item
Single package size 0.4X0.25X0.04 cm
Single gross weight 1.000 kg
Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

C
c*o
Australia May 4.2026
xxx
H
Harry
United Kingdom Mar 18.2026
I bought these 805050 3.7V 2500mAh lithium polymer batteries to replace the old cells in my Bluetooth speakers, and they work brilliantly. Fit is absolutely perfect, no trimming needed at all. The voltage and capacity are spot on, my speakers now hold charge for much longer than before. Power output is stable, sound quality isn’t affected one bit. They’re well-made and feel really durable. Delivery arrived quickly, items were well packed with no damage. Great value for money compared to local stores. I’ve been using them daily for weeks with zero issues. Would absolutely recommend these batteries to anyone needing replacements for wireless speakers. I’ll be coming back to buy more soon!
M
Mike
United States Mar 9.2026
I’m really impressed with this customized 7.4V 16000mAh 18650 battery pack! It fits all my power tools and small electronics perfectly, exactly as I hoped. The large capacity is a total game-changer — I can work for hours on end without constantly recharging. Charging works smoothly, and the power output stays stable the whole time. No sudden power cuts or overheating issues at all. Build quality feels solid and durable, clearly well-made. I also love that it’s customizable to match different devices. Shipping was fast and the item arrived well-packaged. For this price, you simply can’t beat the performance and capacity. Highly recommend it to anyone needing a long-lasting, reliable battery pack for tools or electronics. Will definitely buy again!