Product Description
Lipo Battery LP602530 3.7V 400mAh 1.48wh Rechargeable Lithium
Polymer Battery Cell For Smart Watch
| NO. | Items | Specifications |
| 1 | batteries | 3.7v 400mah lipo battery |
| 2 | Charge voltage | 4.2V |
| 3 | Nominal voltage | 3.7V |
| 4 | Nominal capacity | 400mAh 0.2C Discharge |
| 5 | Charge current
| Standard Charging:0.2C
Rapid charge: 1.0C |
| 6 | Standard Charging method | 0.5C CC(constant current)charge to 4.2V, then CV(constant voltage
4.2V)charge till charge current decline to ≤0.05C |
| 7 | Charging time
| Standard Charging:2.75hours(Ref. )Rapid charge: 2hours(Ref.) |
| 8 | Max.charge current | 0.5C |
| 9 | Max.discharge current | 1.0C |
| 10 | Discharge cut-off voltage | 2.5V0.25V(0.2C) |
| 11 | Operating temperature | Charging: 0 °C ~45 °C Discharging:0 °C ~45 °C |
| 12 | Storage temperature | -10°C~ +45 °C |
| 13 | Dimension | Length:30±0.5mm (not including tabs)
Width:25±0.5mm
Thickness:6±0.2mm |
| 14 | Drop Test | The cell is to be dropped from a height of meter twice onto
concrete ground. No fire, no leakage |
| 15 | cycle time | ≥800times |
Production Process for lithium polymer battery cell:
Electrode Preparation: The ternary positive electrode material
(lithium nickel cobalt manganese oxide) and negative electrode
material (graphite) are mixed with a binder and a conductive agent,
respectively, to form a slurry. The slurry is then evenly coated
onto aluminum foil (positive electrode) and copper foil (negative
electrode). After drying and roller pressing, the slurry is cut
into electrode sheets of corresponding sizes.
Cell Assembly: Using a lamination process (suitable for the
high-precision requirements of small cells), the positive
electrode, separator, and negative electrode are alternately
stacked to form the cell body. This is then encapsulated in an
aluminum-plastic film with a pre-reserved injection port.
Injection and Packaging: The electrolyte (carbonate-based) is
injected in a dry environment, and the aluminum-plastic film is
vacuum-sealed to prevent leakage and moisture intrusion.
Formation and Aging: The cells undergo an initial charge (to form
the SEI film and ensure cycling stability). Capacity, voltage, and
internal resistance testing are then performed to screen qualified
cells. Finally, the cells are aged for 24-48 hours to ensure stable
performance.
Main Advantages for lipo battery:
High Energy Density: The ternary material system boasts a specific
capacity of 150-180 mAh/g, 15%-20% higher than lithium iron
phosphate batteries of the same volume. Its 400 mAh capacity is
ideal for the battery life requirements of small devices.
Excellent Discharge Performance: Supports a 0.5C-2C discharge rate
(normal use: 0.5C, peak: 2C), with a stable voltage platform (over
80% of the discharge range is between 3.7V and 3.2V), making it
suitable for intermittent, low-power power supply scenarios.
Strong Form Factor: The flexible aluminum-plastic film package
withstands slight compression and deformation, allowing it to fit
into irregular installation spaces within devices (such as curved
smart wearables). It is also 30% lighter than a steel-cased lithium
battery of the same capacity.
Safety and Controllability: Equipped with an overcharge,
over-discharge, and overcurrent protection board (PCB), it prevents
voltage anomalies (upper limit: 4.2V / lower limit: 3.0V), reducing
the risk of bulging.
Main Application:
Smart Wearable Devices: Small smart bracelets (such as pedometers),
Bluetooth headsets (single/double earbuds with charging pods),
suitable for lightweight and compact device designs;
Micro IoT Devices: Low-power smart sensors (such as temperature and
humidity sensors, door and window sensors), and micro locators
(children's anti-lost location badges), suitable for long-term
standby (1-3 months) and low-frequency data transmission;
Small Consumer Electronics: Mini remote-controlled toys (mini RC
cars, fingertip gyroscope lights), portable testing equipment (mini
formaldehyde detectors, pulse oximeter backup power supplies),
suitable for intermittent high-rate discharge scenarios;
Medical Assistive Devices: Mini insulin pen accessories, portable
heart rate monitors, meeting the stringent battery stability and
safety requirements of medical equipment.
Product pictures:
