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3.7V 400mAh 902025 Li Polymer Battery for Wearable & Bluetooth Devices

Name: 3.7V 400mAh 902025 Li Polymer Battery for Wearable & Bluetooth Devices
Brand: Shenzhen Vats Power Source Limited
SKU: 902025
Price: 0.98 USD
Availability: InStock

Brand Name:	Vats Battery
Model Number:	902025
MOQ:	3 pcs
Price:	$0.98~1.35
Delivery Time:	7 work days
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

Guangdong, China

Certification:

Dimension:

9±0.2*20±0.5*25±2.5 Mm

Max Discharge Current:

Charge Voltage:

4.2V

Cycle Life:

500 Cycles

Nominal Capacity:

400mAh

Nominal Voltage:

3.7V

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 400mAh Li Polymer Battery

902025 battery for wearable devices

Lithium Polymer Battery with warranty

Product Description

3.7V 400mAh 902025 Li Polymer Battery for Wearable & Bluetooth Devices

This reliable li polymer battery delivers stable 3.7V power for small electronics. It works well as a 3.7v wearable device battery to fix short runtime issues for your Bluetooth gadgets and compact consumer devices. Sample testing is supported for your project validation.

Specifications

Item	Details
Model	HZ902025
Cell Type	Lithium polymer battery
Dimension	9±0.2×20±0.5×25±2.5 mm (Thickness×Width×Length)
Nominal Capacity	400mAh
Nominal Voltage	3.7V
Max Cut-off Voltage	4.2V
Standard Discharge Current	0.2C-0.5C
Max Discharge Current	1C
Connector Option	JST, Molex, custom available
Cycle Life	Up to 500 charge-discharge cycles
Custom Service	Custom size, capacity and voltage supported

Key Features

Stable & Consistent Power Output - Maintains steady voltage under standard load
Long Service Cycle Life - Supports up to 500 charge cycles
Flexible Connector & Custom Options - JST, Molex, or custom connectors available
Strict Safe Packing for Shipment - Meets international air and sea shipping standards
Sample Available For Pre-order Validation - Test real-world performance before bulk purchasing

Applications

Ideal for multiple compact consumer electronics including home smart appliances, car recorders, GPS navigators, massagers, smart bracelets, remote controls, and various small smart gadgets for indoor and light outdoor usage.

Frequently Asked Questions

Can this li polymer battery work for my custom wearable gadget?

This 3.7v wearable device battery fits most compact wearable electronics. Confirm dimension and connector match your hardware before ordering. Custom service is offered for special projects.

What is the typical production lead-time?

Stock items ship within 3-7 days. Custom bulk orders take 2-3 weeks after order confirmation.

Can I get samples for testing?

Yes, sample testing is supported for performance verification on your end.

How many charge cycles can this lithium ion battery cell sustain?

It reaches around 500 charge-discharge cycles under proper charging and discharging conditions.

What connectors are available for this battery?

JST and Molex connectors are optional. We can adjust connectors per your requirement.

Is custom capacity or dimension supported?

Yes, we support custom size, capacity and voltage for special project requirements.

Does this battery meet international shipping standards?

Yes, industrial carton packaging complies with global air and sea shipment requirements.

After-sales Guarantee

We are a professional lithium battery manufacturer. All li polymer battery units go through standard internal checks before shipment. Reach our support team for product issues within valid warranty period. We offer responsive technical support for your integration questions. Sample orders are welcome to verify real performance before large-volume purchase. All goods are packed following international shipping requirements for safe 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

Robert T.

United States May 13.2026

Helpful (99)

As a veteran engineer in portable audio and smart hardware R&D, I demand the absolute best in battery electrical performance. We sourced this 103048 3.7V 1500mAh Li-polymer battery for a BT speaker project, and its real-world performance has completely blown us away.

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:

Lithium Polymer Battery

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High Discharge Lipo Battery

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Li Ion Battery Pack

LiFePO4 Battery Pack

High Temperature Lipo Battery

Custom Lipo Battery

products details

3.7V 400mAh 902025 Li Polymer Battery for Wearable & Bluetooth Devices

3.7V 400mAh Li Polymer Battery

902025 battery for wearable devices

Lithium Polymer Battery with warranty

Overall Rating

Rating Snapshot

All Reviews

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