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10th Floor, Building A, Heyi Phoenix Smart Port, Fuyong Street, Baoan District, Shenzhen




Smart Watch 350mAh Battery


The bigger the battery is not the better, 
because we need to take into account the use and size of the product, 
as well as the impact on the structure when the product is dropped. 
For thinner and lighter watches, our Smart Watch 350mAh Battery balances weight and size, 
and it may be a good choice.

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Due to the large number of battery models, not all models are listed. The three sizes listed below are all 350mAh capacity. If customers think that the size is not suitable, please let us know to get more size or even more capacity options.

Smart Watch 350mAh Battery:

Model Number HZT350LP
Nominal Voltage 3.7V/ 3.8V
Nominal Capacity 350mAh
Sizes 4.5*25*35 mm /6.5*20*30 mm /6.5*20*35 mm
Cycle Life >=500 Times
Working Temperature Charging: 0~45℃,Discharging:-20~60℃
Storage Temperature Temperature: -20~60℃,Humidity60±25%
Certificate Passed ISO9001 System, UL、UN、CE、RoHS、REACH etc.
Warranty 12 Month
Application Field

Smart Watch, Smart Watch for Children,

Walkie-talkies, Remote Controls, Electric Toys

If other sizes and capacities are required, please let us know, the following range can be customized for your smart watch

Sizes Capacity Voltage Wires/ Connector/ PCB

Thickness ≥ 2.5mm

Width ≥ 10mm

Length  ≥ 14mm

50 mAh ~ 1000 mAh 3.2V/ 3.7V/ 3.8V Recommended by us or customized on request
(The larger the capacity, the larger the battery and smart watch sizes also)

Quality Assurance 

Taking UL1642 as the testing standards. and all products will pass 100% finished product testing.

Batteries have a one year warranty from the date of arrival.

Application Field Stable Performance

Long cycle life. Supporting more than 500 times of continuous charging and discharging, the battery capacity is not less than 80% .

High Safety

All our Smart Watch Battery have explosion-proof valves, and all the polymer battery cells use colloidal electricity, which will only bulge at extreme environment and will not explode. In addition, our company has a strict quality inspection process to ensure product safety and quality.


According to your requirements, we can add wires or connector for you, or even design the protection board of the battery for you to ensure the arrangement and function meet your requirements.