Polymer Li-Po · 6 min · 03 May 2026
How to Choose Li-Po Battery Capacity for IoT Devices
A practical guide for hardware engineers selecting polymer lithium cells for low-power IoT applications.
Read more →Polymer Lithium Battery
High energy density Li-Po cells engineered for thin, light, and mission-critical applications. From wearables to medical devices, our polymer lithium batteries deliver consistent performance across thousands of cycles.
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Overview
What is a Polymer Lithium Battery?
Polymer lithium batteries (Li-Po) use a gel-like polymer electrolyte instead of the liquid electrolyte found in conventional lithium-ion cells. This allows for ultra-thin profiles, flexible form factors, and improved safety under abuse conditions. Acme manufactures Li-Po cells from 30 mAh up to 20 Ah, with thicknesses as low as 0.4 mm.
Variants
Standard catalogue and full-custom design.
Same chemistry, same QC. Pick the catalogue when speed matters; pick custom when geometry, capacity or BMS need to be designed around your enclosure.
Standard Li-Po Cells
Pre-designed cells with industry-standard footprints, MOQ 500 pcs, lead time 2 weeks.
Custom Li-Po Cells
Bespoke dimensions, capacity, connectors and BMS integration. ODM/OEM from prototype to mass production.
Specifications
Technical envelope & performance.
Extended ranges available on request — speak to engineering for non-standard targets.
| Parameter | Range | Unit |
|---|---|---|
| Nominal Voltage | 3.7 | V |
| Capacity | 30 – 20,000 | mAh |
| Energy Density | Up to 260 | Wh/kg |
| Cycle Life | ≥ 500 (80% retention) | cycles |
| Operating Temp (Discharge) | -20 to +60 | °C |
| Operating Temp (Charge) | 0 to +45 | °C |
| Min. Thickness | 0.4 | mm |
| Self-Discharge | < 3 | %/month |
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Dimensions
Any L × W × T from 20×15×0.4 mm to 200×150×12 mm
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Capacity
Tunable from 30 mAh to 20 Ah
03
Connectors
JST-PH, Molex, custom pinouts
04
Protection
PCM/PCB with OVP, UVP, OCP, SCP, NTC
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Cable & Length
AWG 24-30, length per spec
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Labeling
Custom shrink wrap, brand labels, barcodes
Manufacturing & QC
From Prototype to Mass Production
All Li-Po cells are manufactured in our ISO 9001 certified facility with automated stacking, vacuum sealing, formation and grading. Every batch undergoes 100% capacity, IR and OCV inspection.
Insights
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Engineering deep-dives that help your hardware team specify the right cell, the first time.
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How to turn a current-vs-time trace into a real-world capacity specification — with a worked IoT example.
Read more →More in this cluster:
- CC/CV Charging: How the Protocol Works and Where It Goes Wrong
- Supply Chain Notes: Cobalt, Nickel, LFP Outlook
- Reading a Cycle-Life Curve Honestly
- Series vs Parallel Cell Configurations: A Pack Designer's Guide
- HV LCO at 4.48 V: Density Gains for Wearables
- BMS Topology Selection: A Decision Framework for OEMs
- Formation Cycling: The Manufacturing Step That Sets a Cell's Entire Life
- Solid-State: Hype vs Reality for Consumer Electronics
- Thermal Runaway: What Triggers It, How to Design Against It
- VC, FEC and LiDFOB: What Electrolyte Additives Do for LiPo Cells
Compliance
Independently certified.
Each shipment carries valid UN 38.3 test summary, MSDS and Certificate of Conformity. Additional reports on request.
UN 38.3IEC 62133CERoHSMSDS
FAQ
Common questions.
What is the minimum order quantity (MOQ) for custom Li-Po cells?
For custom designs the typical MOQ is 3,000 pcs; standard catalog cells start at 500 pcs.
How long does sample production take?
Tooling and prototype samples are typically delivered within 25-35 working days after design freeze.
Do your batteries meet UN 38.3 for air shipping?
Yes, all production cells are tested per UN Manual of Tests and Criteria, Section 38.3, and ship with valid test summaries.
What protection circuits do you integrate?
PCM with overvoltage, undervoltage, overcurrent and short-circuit protection. NTC thermal monitoring is optional.
Ready for a feasibility review?
Send us your envelope and target spec — engineering will respond within one business day.
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