Use Thickness as the Primary Selection Axis
The 3.2mm profile can help teams review shallow housings, front-to-back stack-up and cushioning requirements before choosing a wider battery pocket.
3.7 V Lithium Polymer Battery
The 323540 450mAh LiPo battery uses a 3.2mm-thick, 35mm × 40mm format for OEM products that can provide a wider plan area but have limited depth. Its approximately 1.67Wh calculated energy gives the design team a starting point for runtime and enclosure comparison.

Product Snapshot
The 323540 reference places 450mAh inside a 3.2mm × 35mm × 40mm envelope. The very thin profile and wider footprint make it a different mechanical choice from the shorter, deeper 450mAh alternatives in this series.
The 3.2mm profile can help teams review shallow housings, front-to-back stack-up and cushioning requirements before choosing a wider battery pocket.
The 35mm × 40mm plan area provides space for the 450mAh capacity while changing how the battery sits around boards, displays and retention features.
Technical Data
The table separates confirmed configuration data from calculated electrical references so the 323540 format can be reviewed quickly during product planning.
| Mechanical and Electrical Specifications | |
|---|---|
| Product Number | 323540 |
| Nominal Voltage | 3.7 V |
| Rated Capacity | 450mAh |
| Battery Dimension | 3.2mm × 35mm × 40mm |
| Approximate Battery Weight | Approx. 9g |
| Calculated Electrical References | |
| Standard Charge Current | Approx. 225mA |
| Rapid Charge Current | Approx. 450mA |
| Standard Discharge Current | Approx. 90mA |
| Maximum Discharge Current | Approx. 450mA |
| Calculated Energy | Approx. 1.67Wh |
Approximate weight follows the 3.7 V LiPo family reference. Current and energy values are calculated planning references, not measured limits; confirm the final charger, protection and load specification for the finished battery.
Product Characteristics & Advantages
The 323540 page is differentiated by its shallow 3.2mm profile and wide 35mm × 40mm plan area. It should be compared with other 450mAh cells through mechanical fit first, then through capacity, connector and application requirements.
The calculated electrical references provide a structured starting point for charger, load and protection discussions. Share the finished product requirements with ZERNE to confirm the final battery design and assembly details.
The thin dimension provides a clear starting point for products where battery depth competes with displays, boards, housings or wearable comfort.
The wider plan area may suit a product that can allocate surface area but cannot accommodate a deep or long battery pocket.
The calculated energy can be compared with sensing, display, communication and standby requirements in the finished product.
A shallow pouch still needs appropriate protection, retention, lead routing and enclosure clearance in the completed assembly.
ZERNE can review alternate width, length, capacity, protection and connector arrangements when the wide 323540 format is close but not exact.
Battery Calculation
Use the prefilled 323540 values or enter your own load assumptions for a quick energy and runtime estimate.
Energy is calculated from nominal voltage and capacity. Runtime uses the entered load power and an adjustable efficiency assumption.
Approx. 225mA is the approximate standard-charge reference for 450mAh.
The 323540 reference values are prefilled: 3.7 V, 450mAh and a standard-charge reference of approximately 225mA. Adjust the load power and efficiency to compare operating scenarios; the calculator does not infer safe limits from capacity alone.
Use the result for early comparison, then confirm the charger, protection, connector and final battery specification through sample testing.
Integration Guidance
The 323540 selection is primarily a mechanical decision. Check the 3.2mm cell thickness against the enclosure stack, then reserve the 35mm × 40mm area and the clearance needed for the finished assembly.
Review board, display, cushioning, enclosure wall and retention tolerances around the 3.2mm nominal cell thickness.
The 35mm × 40mm footprint should be placed where it does not obstruct board access, cable routing or service features.
Compare the calculated energy with the load profile and cut-off condition; usable runtime must be validated in the finished device.
Lead exit and connector position can determine whether the wide pouch fits cleanly. Include cable details in the RFQ.
Applications & Solutions
The 323540 450mAh format can be evaluated in products with shallow battery depth and enough surface area for a 35mm × 40mm pouch footprint.
01The 3.2mm profile can support early mechanical evaluation in wearable or compact personal devices where depth is more constrained than plan area.
View Wearable Battery Solutions →
02The shallow pouch can be reviewed in selected medical or diagnostic housings where the battery must sit beneath a cover or alongside a flat electronics stack.
View Medical Battery Solutions →
03The 35mm × 40mm area can be compared with handheld housings that have a broad internal surface but limited depth for the cell.
View Handheld Device Solutions →OEM Battery Support
Share the available 3.2mm depth, 35mm × 40mm pocket, target runtime, load profile and connector details so ZERNE can assess the thin 450mAh reference in the finished product.
The 323540 decision depends on how much surface area is available and how tightly the final stack is controlled.
ZERNE can compare a square, long or custom pouch format when the 323540 width or depth does not match the finished device.
Discuss a Custom BatteryFAQ
Find answers about the 323540 450mAh lithium polymer battery, including its thin profile, wide footprint, calculated energy and application fit.
The 323540 reference measures 3.2mm in thickness, 35mm in width and 40mm in length.
At 3.7 V nominal voltage, the rated 450mAh capacity gives approximately 1.67Wh of calculated energy before device cut-off and system losses.
Its primary differentiator is the 3.2mm thickness, which gives OEM teams a thin reference when the enclosure can provide a wider 35mm × 40mm battery area.
The approximate current values are calculated from the 450mAh rating and the 3.7 V LiPo family rates. Confirm final limits for the completed battery.
Review the 3.2mm depth, 35mm × 40mm footprint, charger, protection, load profile and enclosure tolerances during sample validation.
Yes. ZERNE can review thickness, width, length, capacity, connector, protection and assembly requirements for the target product.
Technical Inquiry
Share the available depth, 35mm × 40mm battery area, operating interval, load profile and connector requirements so ZERNE can assess the 323540 450mAh format.