The 7.4V 2600mAh 18650 battery pack offers significant advantages
in portable heating devices (such as heated gloves, small heated
cushions, and handheld heaters).
Advantages as follows:
1.Strong Voltage Adaptability, Matching to Small Heating Devices
No Additional Transformer Module Required: The 7.4V voltage is
composed of two 3.7V 18650 cells connected in series (2S
structure), perfectly matching the rated operating voltage range of
most small heating elements (such as low-power heating wires and
PTC heating elements). This eliminates the need for additional
boost/buck modules, reducing energy loss and device size, while
also lowering circuit complexity and the risk of failure.
Stable Power Output: The series structure provides a stable voltage
platform and a slow voltage drop rate during discharge, ensuring
stable power output for the heating device. This prevents
inconsistent heating effects caused by voltage fluctuations,
providing a continuous and uniform heating experience.
2.Balanced Capacity and Battery Life
Moderate Battery Life: The 2600mAh capacity is a mainstream
practical capacity for 18650 cells. For small heating devices
(typically 5-20W), it can provide several hours of continuous
heating time (e.g., a 10W device theoretically lasts about 1.9
hours, and a 5W device about 3.8 hours), meeting the core needs of
daily short-term heating (such as outdoor warmth or localized heat
therapy).
3.Natural Advantages of 18650 Cell Characteristics
High Standardization and Consistency: The 18650 is a classic
specification for consumer-grade cylindrical lithium batteries. Its
production process is mature, and the supply chain is
well-established, resulting in strong consistency in parameters
such as capacity, voltage, and internal resistance.
Compact Size and Excellent Portability: The 18650 cell has a
compact size (18mm diameter, 65mm length). Two cells can be
packaged together to create a slender or flat structure, adapting
to the form factor requirements of portable heating devices (such
as wearables and handheld devices).
Strong discharge rate adaptability: Standard 18650 cells can
achieve discharge rates of 1C-2C (2.6A-5.2A), with some high-rate
models offering even higher rates, fully meeting the current
requirements of small heating equipment.
Low maintenance costs and high repairability:
4. Comprehensive advantages in safety and cost
Comprehensive safety assurance: Standard 18650 battery packs
typically integrate protection boards with overcharge,
over-discharge, overcurrent, short circuit, and over-temperature
protection functions, adapting to the temperature variation
scenarios of heating equipment and effectively avoiding battery
safety risks caused by equipment failures (such as short circuits
in heating elements);
High cost-effectiveness: The large-scale mass production of 18650
cells results in lower unit capacity costs compared to customized
non-standard batteries. The production cost of assembling battery
packs is controllable, helping heating equipment manufacturers
reduce product pricing and enhance market competitiveness.
