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Lithium Polymer Battery
Created with Pixso. HZ581013 3.7V 50mAh Small Rechargeable Li Polymer Battery for Earphones

HZ581013 3.7V 50mAh Small Rechargeable Li Polymer Battery for Earphones

Brand Name: VATS Battery or Neutral
Model Number: 581030
MOQ: 10
Price: $1-1.28
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
Discharge Rate:
0.5C
Cycle Life:
500 Charge Cycles
Capacity:
50mAh
Voltage:
3.7V
Battery Size:
5.8*10*13mm
Max Charge Voltage:
4.2V
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 rechargeable Li polymer battery

,

50mAh small polymer battery for earphones

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Li polymer battery with warranty

Product Description
HZ581013 3.7V 50mAh Small Rechargeable Li Polymer Battery for Earphones
Product Specifications
Item Details
Model HZ581013
Battery Type Li-polymer battery
Nominal Voltage 3.7V
Capacity 50mAh
Cell Dimension 5.8 × 10 × 13mm
Standard Discharge Current 0.2C
Max Continuous Discharge Current 1.0C
Charge Voltage 4.2V
Discharge Cut-off Voltage 2.75V
Warranty 12 months
Certification ISO9001
Custom Service OEM & ODM Acceptable
Optional PCB Protection Over-charge, over-discharge, short-circuit, over-temperature protection
Wires & Connector Optional
Product Overview

This compact li polymer battery delivers steady power for tiny electronics. As a reliable 3.7V wearable device battery, it fits earbuds and mini gadgets perfectly, with stable output and optional safety PCB protection.

Key Features
  • Compact Size for Mini Equipment: Small 5.8 × 10 × 13mm footprint fits tightly inside slim earphones and compact wearables. You save valuable internal space for your product design.
  • Built-In Multi-Safety Protection (Optional PCB): The optional protection board guards against over-charge, over-discharge, short-circuit and overheat. It lowers product failure risk for your end users.
  • Flexible OEM & ODM Support: Custom wires, connectors and PCBA options are available. We adjust this lithium ion battery cell to match your device assembly requirements.
  • Fast Lead Time With Factory Stock: In-stock orders ship within 5 working days. Out-of-stock orders take 20-25 working days, helping you manage inventory smoothly.
  • Free Sample Support for Verification: Test this 3.7V wearable device battery before bulk purchase. Samples help you confirm size, performance and compatibility ahead of mass production.
  • 12-Month Reliable Warranty: We stand behind our li polymer battery. Covered quality issues get proper support within the warranty window to reduce your after-sale burden.
Applications

This li polymer battery works well for many compact consumer electronics across daily use, travel and home scenarios. Suitable devices include dash cameras, GPS trackers, smart home gadgets, massagers, digital cameras, sprayers, water flossers, smart bands, blackhead removers, remote controllers, smart watches, electronic toy guns, electric air pumps, smart trash cans, small Bluetooth speakers, fingerprint locks, smart speakers, electric hair trimmers, dog trainers, pest repellers, camping lights, robot vacuums, electric toothbrushes, pet water fountains, electric shavers, handheld mini fans and other compact intelligent electronics.

Frequently Asked Questions
Q1: What devices fit this 3.7V wearable device battery?

A1: It suits Bluetooth earphones and other small low-current portable electronics listed in our application section. Always check dimension and voltage before installation.

Q2: Can I get a free sample of this li polymer battery?

A2: Yes, we support free samples for you to test performance and dimension before bulk orders.

Q3: Is OEM or ODM available for this lithium ion battery cell?

A3: Yes, we accept OEM & ODM. Custom wires, connectors and PCB protection can be arranged based on your drawings.

Q4: What is the working temperature range?

A4: Charge at 0~+40°C; discharge works from -20~+60°C for stable outdoor and indoor use.

Q5: How long is the production lead time?

A5: Stock items ship in 5 working days. Non-stock customized orders need roughly 20-25 working days.

Q6: Does this cell come with protection PCB by default?

A6: PCB protection is optional. Please tell us if you need over-charge and short-circuit protection for your project.

Q7: What warranty do you provide?

A7: This li polymer battery carries a 12-month warranty against factory quality defects.

After-sales Guarantee

We provide a 12-month warranty for this li polymer battery. Defective items caused by manufacturing issues qualify for proper after-sale support. Our engineering team supports pre-order technical checks for your 3.7V wearable device battery integration. We maintain clear order updates and responsive business support for bulk buyers. All cells follow ISO9001 quality control standards to keep consistent performance for your finished products.

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.