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402025 3.7V 150mAh Li-Polymer Battery For Smart Ring Wearable Devices

Name: 402025 3.7V 150mAh Li-Polymer Battery For Smart Ring Wearable Devices
Brand: Shenzhen Vats Power Source Limited
SKU: 402025
Price: 0.95 USD
Availability: InStock

Brand Name:	VATS Battery or Neutral
Model Number:	402025
MOQ:	10
Price:	$0.95-1.5
Delivery Time:	7 work days
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

Guangdong, China

Certification:

UL1642//UL2054/CB/KC/PSE/CE/ROHS/UN38.3/MSDS

Battery Size:

4±0.2*20±0.5*25±2.5mm

Voltage:

3.7V

Capacity:

150mAh

Discharge Rate:

0.5C

Max Charge Voltage:

4.2V

Cycle Life:

500 Charge Cycles

Packaging Details:

Industrial cartons compliant with air & sea shipping standards

Supply Ability:

Ships in 7 Business Days (In-Stock) / 30 Business Days (Out-of-Stock)

Highlight:

3.7V Li-Polymer battery for smart rings

150mAh wearable device battery

Lithium Polymer battery with warranty

Product Description

402025 3.7V 150mAh Li-Polymer Battery For Smart Ring Wearable Devices

This reliable li polymer battery delivers stable power for compact wearables and small electronics. Our 3.7v wearable device battery fits tight-space gadgets, holds consistent output and supports sample testing before bulk orders.

Specifications

Item	Details
Model	402025
Cell Type	Lithium polymer battery
Dimension	4±0.220±0.525±2.5mm (ThicknessWidthLength)
Nominal Capacity	150mAh, custom size/capacity/voltage available
Nominal Voltage	3.7V
Max Cutoff Voltage	4.35V
Standard Discharge Current	0.2C-0.5C
Max Discharge Current	1C
Connector	JST / Molex, customizable on request
Cycle Life	500 cycles
Certificate	KC Certified
Packaging	Industrial carton, compliant with international air & sea shipping rules

Key Features

Stable, Long-Cycle Power Supply - Built for 500 charge cycles, maintains steady discharge for daily-use small electronics
Customizable Connector & Spec Options - Choose JST or Molex connectors, or request tailored size, capacity and voltage
Verified KC Safety Certification - Meets standard international shipping rules for air and ocean transport
Sample Testing Supported - Validate performance on your prototype before bulk purchase
Flexible Lead Time - Stock items ship in 3-7 days; bulk orders take 2-3 weeks

Product Applications

This compact li polymer battery works for a wide range of portable and smart electronics including:

Car Recorders GPS Navigators Smart Home Appliances Massagers Digital Cameras Sprayers Dental Rinsers Smart Bracelets Blackhead Removers Remote Controls Smart Rings Smart Watches Electric Inflator Pumps Smart Trash Cans Bluetooth Speakers Fingerprint Locks Electric Hair Clippers Pest Repellers Camping Lights Robot Vacuums Electric Toothbrushes Pet Water Fountains Electric Shavers Handheld Mini Fans

Frequently Asked Questions

Can I get samples of this 3.7v wearable device battery for testing?

Yes, sample testing is supported. Contact us to arrange sample delivery for your prototype verification.

What is the cycle life of this li polymer battery?

It supports up to 500 charge-discharge cycles under standard use conditions.

Can I customize the connector or battery capacity?

Yes. We offer custom size, voltage, capacity and JST/Molex connector options to match your device.

What is the production lead time for bulk orders?

Stock goods ship within 3-7 days. New bulk production normally takes 2 to 3 weeks after order confirmation.

Does this lithium ion battery cell pass KC certification?

Yes, this battery carries KC certificate, suitable for export to South Korea market.

Is the packaging qualified for air and sea shipment?

Yes, we use industrial cartons that meet international air and shipping standards.

What is the maximum discharge current for this 150mAh li-polymer cell?

Its maximum discharge current is 1C, standard discharge current ranges from 0.2C to 0.5C.

Is this battery suitable for smart ring and tiny wearable devices?

Absolutely. The slim 402025 dimension makes it an ideal 3.7v wearable device battery for compact wearables like smart rings.

After-sales Guarantee

We provide quality assurance for our li polymer battery. If you encounter manufacturing defects under normal application, reach our support team promptly. We maintain transparent communication for bulk B2B buyers. All units follow certified safety standards, and our team offers technical support for integration questions about this 3.7v wearable device battery. We follow standardized shipping protocols for smooth cross-border delivery.

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

3 stars

2 stars

1 stars

All Reviews

Markus K.

Germany May 15.2026

Helpful (45)

Ich war anfangs echt ein bisschen skeptisch, weil man im Netz ja viel zu hören bekommt, wenn es um Li-Polymer-Akkus geht. Aber der originale E66 Akku hier? Junge, Junge... das Teil ist ein Biest! Ich habe die Zelle jetzt seit ein paar Wochen in meinem DIY-Solar-Projekt verbaut und ausgiebig getestet. Was soll ich sagen: Die 66ah sind absolut real, kein Fake-Wert! Die Kapazität ist stabil, die Spannung von 3.7V bleibt auch unter Last super konstant und das Teil wird beim Laden kaum handwarm. Man merkt einfach sofort, dass die Verarbeitungsqualität stimmt und das PCB-Schutzboard ordentlich mitgedacht wurde. Für den Preis kriegt man hier in Deutschland aktuell kaum was Besseres. Versand war auch fix, Verpackung war bombensicher – so muss das laufen! Wer verlässliche Power sucht, kann hier echt bedenkenlos zugreifen. Von mir gibt's eine klare Kaufempfehlung und verdiente 5 Sterne. Daumen hoch!

Owen

Canada Apr 7.2026

Helpful (86)

I’ve been using this 357090 3.7V 2500mAh lipo battery for a few weeks now, and I’m really satisfied with it. It is steady-quality rechargeable lithium polymer batteries that perfectly match the rated voltage and capacity. Output efficiency is great, which helps me save a lot of working time. Build quality feels solid too, no weird noises or faults during daily operation. Shipping was fast and the packaging was protective. For small-scale battery production and copying work, this is absolutely a practical and cost-effective pick. I’d definitely recommend it to fellow business partners and will consider reordering in the future.

Harry

United Kingdom Mar 18.2026

Helpful (90)

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!

Tags:

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Li Ion Battery Pack

LiFePO4 Battery Pack

High Temperature Lipo Battery

Custom Lipo Battery

products details

402025 3.7V 150mAh Li-Polymer Battery For Smart Ring Wearable Devices

3.7V Li-Polymer battery for smart rings

150mAh wearable device battery

Lithium Polymer battery with warranty

Overall Rating

Rating Snapshot

All Reviews

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