1S2P 3.7V 3000mAh Lithium Polymer Battery – High Capacity, Low Internal Resistance

This 1S2P 3.7V 3000mAh Li-polymer battery is basically built for devices that need solid power without eating up space. We make it in-house, using decent-grade polymer cells, so the capacity is real and the performance doesn’t drift after a few months. The voltage stays steady, the internal resistance is low, and it handles daily charge cycles without getting temperamental. It’s the kind of battery you’d put into smart terminals, IoT gear, small medical devices, wearables, or any portable product where you can’t afford power issues.

This battery uses a 1S2P setup, basically one cell in series and two in parallel. It runs at a 3.7V nominal voltage and delivers a solid 3000mAh capacity, so the performance and runtime are very dependable. The chemistry is LiPo, which keeps the pack light and compact—great for devices where every millimeter matters. It’s already compliant with RoHS and UN38.3, and if your project needs more documents, we can also provide MSDS or IEC62133 on request.

3000mAh 1S2P Lithium Polymer Battery Features

Real 3000mAh Capacity

Delivers true capacity—no tricks, no drop-off when you actually start using it.

Stable Voltage Output

Keeps the voltage steady, which is especially important for medical and sensor devices.

Runs Cool

Low internal resistance means better charging efficiency and noticeably less heat.

Long Cycle Life

Holds up well over time; capacity decline is slow and predictable

Works With Many Devices

IoT units, GPS trackers, small medical gear, wearables, portable tools—basically anything that needs a compact power pack.

Fully Customizable

Size, wires, connectors, protection board, branding—easy to adjust for your project.

This battery works well in all kinds of compact electronics—GPS trackers, smart watches and fitness bands, portable medical gear, Bluetooth speakers, headsets, and even small tools or sensors that need a steady power source. If you’re building your own device, we also handle full OEM and ODM support. That includes custom sizes, different connector options, adding a PCM or BMS, and even branding if you need the battery to match your product line.