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551245 3.7V 250mAh Li Polymer Battery For Bluetooth Speaker & Wearable Devices

Name: 551245 3.7V 250mAh Li Polymer Battery For Bluetooth Speaker & Wearable Devices
Brand: Shenzhen Vats Power Source Limited
SKU: 551245
Price: 0.98 USD
Availability: InStock

Brand Name:	Vats Battery
Model Number:	551245
MOQ:	3 pcs
Price:	$0.98~2.2
Delivery Time:	7 work days
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

Guangdong, China

Certification:

Dimension:

5.5±0.2*12±0.5*45±2.5 Mm

Max Cut-off Voltage:

4.2V

Standard Discharge Current:

0.2C-0.5C

Max Discharge Current:

Nominal Capacity:

250mAh

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 Li Polymer battery for Bluetooth speaker

250mAh lithium polymer battery with warranty

Li Polymer battery for wearable devices

Product Description

551245 3.7V 250mAh Li Polymer Battery For Bluetooth Speaker & Wearable Devices

This reliable li polymer battery delivers steady 3.7V power for compact electronics. The 250mAh HZ551245 lithium ion battery cell works well for small portable gadgets like Bluetooth speakers. It supports sample testing and custom modifications to match your device needs.

Technical Specifications

Item	Details
Model	HZ551245
Cell Type	Lithium polymer battery
Dimension	5.5±0.212±0.545±2.5 mm (ThickWidthLength)
Nominal Capacity	250mAh, custom size/capacity/voltage available
Nominal Voltage	3.7V
Max Cutoff Voltage	4.2V
Standard Discharge Current	0.2C–0.5C
Max Continuous Discharge Current	1C
Connector	JST / Molex, customizable
Cycle Life	500 charge cycles
Packaging	Industrial carton for air & sea shipment

Key Features

Stable 3.7V Output for Compact Electronics - Consistent voltage avoids sudden power drops, protecting your small devices from unexpected shutdown during daily use.
500-Cycle Long Service Life - Durable cell construction maintains usable capacity over repeated charges, lowering your long-term replacement cost.
Flexible Custom Connector & Dimensions - Adjustable wiring and sizes let this 3.7v wearable device battery fit unique product designs without heavy rework.
Shorter Lead Time for Stock Items - Stock units ship in 3–7 days, while custom orders finish in 2–3 weeks, helping you keep inventory on schedule.
Safe International Shipment Packaging - Cartons meet air and ocean transport standards, reducing risks during cross-border delivery for your bulk orders.

Applications

This li polymer battery fits many compact consumer electronics. It powers Bluetooth speakers, car dash cameras, GPS navigators and smart home accessories. It also works for massagers, digital cameras, sprayers, dental rinsers, smart bracelets, blackhead cleaners and remote controls. Suitable for daily commute, home use and lightweight portable gear projects.

Frequently Asked Questions

Can I order samples of this 3.7v wearable device battery?

Yes, sample testing is supported for evaluation before bulk purchase.

What is the typical cycle lifespan of this lithium ion battery cell?

It reaches up to 500 standard charge and discharge cycles under proper use.

Can I change the connector type on this li polymer battery?

Sure. JST or Molex connectors are optional, and we accept custom connector requests.

How long will production take for a custom batch?

Custom orders take 2–3 weeks. Ready stock items ship within 3–7 days.

Can I adjust the capacity or size for my device?

Yes, we offer custom size, capacity and voltage options to match your hardware.

What is the maximum discharge current rating?

The maximum continuous discharge current for this cell is 1C.

Is this battery approved for air shipping?

It uses standard industrial cartons compliant with international air and sea transport rules.

After-sales Guarantee

We are the direct manufacturer of this li polymer battery. All cells follow controlled production standards. We provide responsive technical support to resolve compatibility and installation questions. Please inspect goods upon receipt and reach out for support if you have any quality concerns. We follow standard return procedures for qualified issues.

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

Markus K.

Germany May 15.2026

Helpful (45)

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!

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:

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Li Ion Battery Pack

LiFePO4 Battery Pack

High Temperature Lipo Battery

Custom Lipo Battery

products details

551245 3.7V 250mAh Li Polymer Battery For Bluetooth Speaker & Wearable Devices

3.7V Li Polymer battery for Bluetooth speaker

250mAh lithium polymer battery with warranty

Li Polymer battery for wearable devices

Overall Rating

Rating Snapshot

All Reviews

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