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403035 3.7V 400mAh Li Polymer Battery For Small Wearable & Consumer Devices

Name: 403035 3.7V 400mAh Li Polymer Battery For Small Wearable & Consumer Devices
Brand: Shenzhen Vats Power Source Limited
SKU: 403035
Price: 0.98 USD
Availability: InStock

Brand Name:	VATS Battery or Neutral
Model Number:	403035
MOQ:	10
Price:	$0.98-1.48
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

Model:

403035

Cell Type:

Lithium Polymer Battery

Nominal Voltage:

3.7V

Nominal Capacity:

400mAh

Max Cut-off Voltage:

4.35V

Dimension:

4±0.2*30±0.5*35±2.5 Mm

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 wearables

400mAh lithium polymer battery

small LiPo battery for consumer devices

Product Description

403035 3.7V 400mAh Li Polymer Battery For Small Wearable & Consumer Devices

403035 3.7V 400mAh Li Polymer Battery for Small Wearable & Consumer Devices

Specifications

Item	Details
Model	403035
Cell Type	Lithium polymer battery
Nominal Voltage	3.7V
Nominal Capacity	400mAh
Max Cut-off Voltage	4.35V
Dimension	4±0.230±0.535±2.5 mm (ThicknessWidthLength)
Standard Discharge Current	0.2C-0.5C
Max Discharge Current	1C
Connector	JST / Molex, customizable
Cycle Life	Up to 500 charge-discharge cycles
Custom Service	Custom size, capacity and voltage available
Sample Test	Sample support available
Lead Time	2-3 weeks for bulk orders; 3-7 days for stock items

Product Brief

This durable li polymer battery delivers steady 3.7V power for compact electronics. It works as a reliable 3.7V wearable device battery to replace aged internal cells, keeping your small gadgets running stably. Our lithium ion battery cell fits many portable consumer products without complicated modification.

Why Choose Us

Reliable Cycle Performance: Up to 500 cycles keeps consistent capacity over long-term daily use. You get less frequent battery replacement and lower running cost for your devices.
Flexible Connector & Custom Options: Select JST or Molex connectors per your project. Custom size, voltage and capacity are supported. It saves extra modification work for your new product development.
Stable Safe Discharge Output: 0.2C-0.5C standard discharge with 1C peak output. This lithium ion battery cell supplies smooth power and reduces risk of unexpected shutdown for compact electronics.
Available Sample Testing: You may order samples to verify real-world performance before bulk purchase. Avoid mass order risk for your small-batch projects.
Reasonable Production Lead Time: Stock units ship within 3-7 days. Custom bulk orders finish within 2-3 weeks. Help you keep your inventory supply schedule on track.

Product Application

This practical li polymer battery fits a wide range of compact electronic gear for home use, daily commuting and outdoor activities.

Vehicle accessories: car recorders, GPS navigators
Personal care & health: massagers, dental rinsers, blackhead devices, electric shavers, electric toothbrushes
Wearable gadgets: smart bracelets, wearable trackers, it works well as a 3.7V wearable device battery
Smart home: smart home appliances, remote controls, fingerprint locks, smart bins, bluetooth speakers
Outdoor & camping: camping lights, handheld mini fans, sprayers
Other portable gear: digital cameras, electric inflator pumps, pet water fountains, training collars, electronic toys and more small smart consumer electronics.

FAQ

Q: Can this 3.7V wearable device battery replace my old internal battery directly?

A: Please match dimension, voltage and connector pinout before installation. This li polymer battery fits most devices with 403035 size requirement.

Q: What is the cycle life of this lithium ion battery cell?

A: It can reach 500 charge-discharge cycles under standard working condition. Actual service life depends on your discharge and charging habits.

Q: Do you support custom battery specifications?

A: Yes. Custom size, capacity, voltage and connector options are available for bulk orders.

Q: Can I get samples for performance testing?

A: Samples are supported. You may test compatibility with your device before placing large-volume orders.

Q: What is your order lead time?

A: In-stock items ship within 3-7 working days. Custom bulk production takes 2-3 weeks after order confirmation.

Q: What packaging do you use for shipment?

A: Industrial carton packaging meets international air and ocean shipping standards for battery safety transit.

Q: Is this battery compatible for DIY small electronic projects?

A: Yes, it suits most low-power compact DIY projects, please stay within 1C maximum discharge current limitation.

After-sales Guarantee

We are a professional lithium polymer battery manufacturer from China. All units follow standard production specifications. If quality defects happen under normal usage conditions, we offer proper after-sales support. Sample testing is encouraged to confirm fit for your target equipment before bulk procurement. Our responsive sales team offers technical support for specification confirmation and order follow-up. All goods use qualified carton packing compliant with international battery shipping rules for secure transit.

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!

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Custom Lipo Battery

products details

403035 3.7V 400mAh Li Polymer Battery For Small Wearable & Consumer Devices

3.7V Li Polymer battery for wearables

400mAh lithium polymer battery

small LiPo battery for consumer devices

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