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Lithium Polymer Battery
Created with Pixso. 653040 800mAh 3.7V Li Polymer Battery for Smart Bracelet Wearable Devices

653040 800mAh 3.7V Li Polymer Battery for Smart Bracelet Wearable Devices

Brand Name: Vats Battery
Model Number: 551245
MOQ: 3 pcs
Price: $1.25~1.6
Delivery Time: 7 work days
Payment Terms: T/T
Detail Information
Place of Origin:
Guangdong, China
Certification:
CE
Max Cut-off Voltage:
4.2V
Max Discharge Current:
1C
Nominal Capacity:
800mAh
Nominal Voltage:
3.7V
Standard Discharge Current:
0.2C-0.5C
Dimension:
6.5±0.2 * 30±0.5 * 40±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:

800mAh Li Polymer battery for smart bracelet

,

3.7V wearable device battery

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Lithium Polymer battery with warranty

Product Description
653040 800mAh 3.7V Li Polymer Battery for Smart Bracelet Wearable Devices
Product Specifications
Item Details
Model HZ653040
Battery Type Lithium polymer battery
Dimension 6.5±0.2 * 30±0.5 * 40±2.5 mm (T * W * L)
Nominal Capacity 800mAh
Nominal Voltage 3.7V
Max Cutoff Voltage 4.2V
Standard Discharge Current 0.2C - 0.5C
Max Discharge Current 1C
Cycle Life 500 Cycles
Connector JST / Molex, customizable
Certificates KC, MSDS
653040 Li Polymer Battery product view 653040 Li Polymer Battery side view 653040 Li Polymer Battery connector detail 653040 Li Polymer Battery dimensional view
Product Overview

This reliable lithium polymer battery delivers steady 3.7V power for wearables and small electronics. As a stable lithium ion battery cell, it works as a practical 3.7V wearable device battery to keep compact gadgets running smoothly with consistent output.

Key Features
  • Stable 3.7V Continuous Output: Delivers consistent power without sudden voltage drops, protecting your wearable circuit and extending device run time.
  • Customizable Build & Connector: Adjustable size, capacity and JST/Molex connector options, so the 3.7V wearable device battery fits your custom product design perfectly.
  • Long 500-Cycle Service Life: Maintain usable capacity after repeated charge cycles, lowering your long-term replacement and material cost.
  • Verified Safety Documentation: Comes with KC and MSDS certificates to meet cross-border shipping and compliance checks for your electronic goods.
  • Flexible MOQ & Sample Support: We support sample testing for validation, with stock items shipped fast and custom orders produced within 2–3 weeks.
Applications

This lithium polymer battery suits many compact consumer electronics. It fits smart bracelets, car dash cameras, GPS navigators, small massagers, dental rinsers, sprayers, blackhead devices, remote controls and other smart home or portable gadgets for daily commute, home use and outdoor travel.

Frequently Asked Questions
Q: Is this a 3.7V wearable device battery for smart wristbands?

A: Yes, this lithium ion battery cell is engineered for smart bracelets and other compact wearable electronics.

Q: Can I get samples to test before bulk order?

A: Sample testing is available for you to verify performance and dimension matching.

Q: What is the typical lead time for this li polymer battery?

A: Stock units ship in 3–7 days, while custom orders take 2 to 3 weeks after confirmation.

Q: Can I change the connector type for my device?

A: JST or Molex connectors are optional, we can match the connector per your requirement.

Q: What certifications come with this battery?

A: It is supplied with KC and MSDS documents for logistics and product compliance.

Q: How many charge cycles can this battery support?

A: It offers up to 500 charge cycles under standard discharge conditions.

After-sales Guarantee

We are the direct manufacturer for this lithium ion battery cell. All lithium polymer battery units go through basic quality checks before packing. We use industrial cartons that meet international air and sea shipping standards. Reach our support team promptly for compatibility or order questions, we will assist to resolve issues efficiently for your 3.7V wearable device battery orders.

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.