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Lithium Polymer Battery
Created with Pixso. 300938 3.7V 75mAh Li‑Polymer Battery for Wearable & Small Consumer Electronics

300938 3.7V 75mAh Li‑Polymer Battery for Wearable & Small Consumer Electronics

Brand Name: VATS Battery or Neutral
Model Number: 300938
MOQ: 10
Price: $0.8-2
Delivery Time: 7 work days
Payment Terms: T/T
Detail Information
Place of Origin:
Guangdong, China
Certification:
UL1642//UL2054/CB/KC/PSE/CE/ROHS/UN38.3/MSDS
Battery Size:
3.0±0.2*08±0.5*38±2.5 Mm
Voltage:
3.7V
Max Charge Voltage:
4.2V
Discharge Rate:
0.5C
Cycle Life:
500 Charge Cycles
Capacity:
75mAh
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

,

75mAh lithium polymer battery

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small electronics Li-Polymer battery

Product Description
300938 3.7V 75mAh Li‑Polymer Battery for Wearable & Small Consumer Electronics

This reliable li polymer battery delivers stable 3.7V power for compact small‑size electronics. Our lithium ion battery cell keeps your wearable and portable devices running steadily without frequent power drops. It supports sample testing and custom modification to match your hardware needs.

Specifications
Item Details
Model 300938
Cell Type Lithium polymer battery
Nominal Capacity 75mAh, custom capacity & size available
Nominal Voltage 3.7V
Max Cut‑off Voltage 4.35V
Product Dimension 3.0±0.2*08±0.5*_38±2.5 mm (Thickness*_ Width*Length)
Discharge Current Standard:0.2C‑0.5C, Max:1C
Cycle Life Up to 500 charge‑discharge cycles
Connector JST / Molex, customizable on request
Certifications ISO9001, ISO14001
Packaging Industrial carton for air & ocean shipping compliance
Key Features
  • Stable & Consistent Power Output: Built as quality lithium ion battery cell, it maintains steady voltage output during discharge. Your small electronics will avoid sudden shutdown caused by unstable power supply.
  • Long Service Cycle Life: Reaches up to 500 charge cycles. You get extended usable time before replacement, lowering your long‑term component replacement cost.
  • Flexible Custom Support: This 3.7v wearable device battery supports custom size, capacity and connector options. Adjust specifications to perfectly fit your unique product project.
  • Strict Factory Quality Control: Manufactured under ISO9001 and ISO14001 standards. Each li polymer battery goes through basic quality check before shipment for consistent performance.
  • Convenient Sample & Bulk Lead Time: Sample testing is supported. Stock items ship within 3‑7 days, mass production finishes within 2‑3 weeks after order confirmation. You can arrange your project schedule efficiently.
  • Safe International‑Compliant Packaging: Carton packing meets air and sea shipping standards. No extra adjustment needed for cross‑border logistics for your bulk orders.
Applications

This compact li polymer battery fits a wide range of small‑sized electronic devices for home use, daily commuting, outdoor camping and travel scenarios. It works well for:

  • Car recorders, GPS navigators
  • Smart home appliances, massagers
  • Digital cameras, sprayers, dental rinsers
  • Smart bracelets, blackhead removal devices
  • Remote controllers, smart watches
  • Electronic toy guns, electric air pumps
  • Smart trash cans, bluetooth speakers
  • Fingerprint locks, electric hair clippers
  • Dog training collars, animal repellent units
  • Camping lamps, robot vacuum cleaners
  • Electric toothbrushes, pet water fountains
  • Electric shavers, mini handheld fans
  • Other compact smart consumer electronics
Frequently Asked Questions
Is this 3.7v wearable device battery compatible for custom hardware projects?

Yes. We offer custom dimension, capacity and connector. Send your hardware drawing for our evaluation. This lithium ion battery cell can be adjusted for most compact device designs.

Can I get samples for performance testing?

Sample testing is supported. You may place sample orders before large‑volume purchase to verify real‑world performance.

What is the typical lead time for bulk orders?

In‑stock goods ship within 3‑7 working days. Custom bulk orders take 2‑3 weeks after order confirmation.

How many charge cycles can this li polymer battery sustain?

It delivers up to 500 standard charge‑discharge cycles under proper charging and discharging operation.

What connector options are available?

JST and Molex connectors are available. We can fit other connectors based on your project requirements.

Does the battery meet cross‑border shipping rules?

Yes. Industrial carton packaging complies with international air and sea shipping requirements for lithium batteries.

Can I modify capacity or voltage for my product?

Custom capacity, dimension and voltage options are available for your project.

After‑sales Guarantee

All our li polymer batteries are produced in ISO9001 & ISO14001 certified factory. We support sample pre‑testing for you to confirm real‑world performance before bulk purchase. Our professional support team responds to product‑related inquiries efficiently. Please follow official charging specifications for proper battery usage. For manufacturing‑origin defects, please contact our support team for solution support within valid usage period. Custom bulk orders get dedicated project follow‑up to keep your procurement on schedule.

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

M
Markus K.
Germany May 15.2026
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!
R
Robert T.
United States May 13.2026
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.
O
Owen
Canada Apr 7.2026
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.