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303450 3.7V 500mAh Li Polymer Battery 3mm Thin Lipo Cell

Name: 303450 3.7V 500mAh Li Polymer Battery 3mm Thin Lipo Cell
Brand: Shenzhen Vats Power Source Limited
SKU: 303450
Price: 1.05 USD
Availability: InStock

Brand Name:	VATS Battery or Neutral
Model Number:	303450
MOQ:	10
Price:	$1.05-1.45
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

Discharge Rate:

0.5C

Voltage:

3.7V

Max Charge Voltage:

4.2V

Capacity:

500mAh

Cycle Life:

500 Charge Cycles

Battery Size:

3*34*50mm

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 500mAh Li Polymer Battery

3mm thin Lipo cell battery

Lithium Polymer Battery with warranty

Product Description

303450 3.7V 500mAh Li Polymer Battery 3mm Thin Lipo Cell

303450 3.7V 500mAh Li Polymer Battery, 3mm Thin Lipo Cell

Specifications

Item	Details
Model	303450
Battery Type	Polymer Lithium Battery
Nominal Voltage	3.7V
Capacity	500mAh
Charge Voltage	4.2V
Dimension	3×34×50mm
Standard Continuous Discharge	0.2C
Max Continuous Discharge	1C
Certifications	ISO9001, KC, CQC, CE
Custom Service	OEM & ODM Available
Warranty	12 Months

Product Brief

This slim li polymer battery delivers steady 3.7V power for compact electronics. It works reliably as a 3.7V wearable device battery for small gadgets, with certified safety and flexible customization for your product integration.

Why Choose Us

Slim 3mm Compact Form Factor: Fits narrow device housings easily. No bulky space waste for wearables and small consumer electronics.
Stable 0.2C Standard & 1C Max Discharge: Consistent power output avoids sudden voltage drops, protecting your circuit and extending device runtime.
Verified Global Safety Certifications: ISO9001, KC, CQC and CE approved. This lithium ion battery cell meets compliance requirements for EU and Korean market sales.
Optional PCB Protection Circuit: Add built-in overcharge, over-discharge and short-circuit guard to lower failure risk for end products.
Flexible OEM & ODM Support: Custom wires, connectors and labels to match your product design and brand needs.
Free Sample Available for Validation: Test this 3.7V wearable device battery before bulk order to confirm fit and performance.

Product Application

This li polymer battery fits a wide range of portable electronics for home, travel and daily use. It powers car recorders, GPS navigators, smart home appliances, massagers, digital cameras and sprayers. Also compatible with dental rinsers, smart bracelets, blackhead removers, remote controls and smart wearables. Additional use cases: smart watches, electronic toy guns, electric air pumps, smart trash cans, Bluetooth speakers, fingerprint locks, electric hair clippers, dog trainers, pest repellers, camping lights, robot vacuums, electric toothbrushes, pet water fountains, electric shavers and handheld mini fans.

FAQ

Q1: What devices can this 3.7V wearable device battery work with?

A1: It suits low-to-medium drain compact electronics listed above. Match dimension and voltage before integration.

Q2: What is the max safe charge voltage for this li polymer battery?

A2: The charging voltage must stay at 4.2V, do not use higher voltage chargers.

Q3: Can you make custom connectors or cables for this lithium ion battery cell?

A3: Yes, OEM and ODM service is supported for custom wiring, plugs and marking.

Q4: How long is your product warranty?

A4: We offer a 12-month warranty for quality issues under proper operation.

Q5: Can I get samples for testing?

A5: Free samples are available for clients to verify size and performance before bulk purchase.

Q6: Is this battery certified for sale in EU and South Korea?

A6: Yes, it carries CE and KC certifications to meet regional import standards.

Q7: What continuous discharge current can this 500mAh lipo battery sustain?

A7: Standard continuous discharge is 0.2C, peak continuous discharge reaches 1C.

Q8: Is PCB protection included by default?

A8: PCB protection is optional, you may select it based on your circuit design requirement.

After-sales Guarantee

We provide a 12-month warranty for this li polymer battery against manufacturing defects. Our technical team supports pre-sales matching and post-order troubleshooting for your integration project. All units pass certification checks before shipment, helping you clear customs smoothly for EU and Korea markets. Contact our support team quickly for any quality or compatibility questions.

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

303450 3.7V 500mAh Li Polymer Battery 3mm Thin Lipo Cell

3.7V 500mAh Li Polymer Battery

3mm thin Lipo cell battery

Lithium Polymer Battery with warranty

Overall Rating

Rating Snapshot

All Reviews

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