Small Capacity LiPo Batteries (up to 500mAh)
Custom 3.7V LiPo batteries from 40mAh to 500mAh for ultra-compact devices such as TWS earbuds, wearables, smart rings, hearing aids, sensors and miniature IoT products. Every cell ships with a connector, PCM protection and full customization.
Available Models
LiPo
3.7V 30mAh LiPo Battery THOR-370820
3.7 × 8 × 20 mm
LiPo
3.7V 35mAh LiPo Battery THOR-251416
2.5 × 14 × 16 mm
LiPo
3.7V 40mAh LiPo Battery THOR-301120
3 × 11 × 20 mm
LiPo
3.7V 50mAh LiPo Battery THOR-301025
3 × 10 × 25 mm
LiPo
3.7V 60mAh LiPo Battery THOR-401020
4 × 10 × 20 mm
LiPo
3.7V 70mAh LiPo Battery THOR-401025
4 × 10 × 25 mm
LiPo
3.7V 80mAh LiPo Battery THOR-302022
3 × 20 × 22 mm
LiPo
3.7V 90mAh LiPo Battery THOR-401130
4 × 11 × 30 mm
LiPo
3.7V 100mAh LiPo Battery THOR-501125
5 × 11 × 25 mm
LiPo
3.7V 100mAh LiPo Battery THOR-601120
6 × 11 × 20 mm
LiPo
3.7V 120mAh LiPo Battery THOR-501520
5 × 15 × 20 mm
LiPo
3.7V 130mAh LiPo Battery THOR-501230
5 × 12 × 30 mm
LiPo
3.7V 150mAh LiPo Battery THOR-501525
5 × 15 × 25 mm
LiPo
3.7V 180mAh LiPo Battery THOR-601230
6 × 12 × 30 mm
LiPo
3.7V 200mAh LiPo Battery THOR-502030
5 × 20 × 30 mm
LiPo
3.7V 200mAh LiPo Battery THOR-502025
5 × 20 × 25 mm
LiPo
3.7V 200mAh LiPo Battery THOR-602025
6 × 20 × 25 mm
LiPo
3.7V 250mAh LiPo Battery THOR-402525
4 × 25 × 25 mm
LiPo
3.7V 280mAh LiPo Battery THOR-402040
4 × 20 × 40 mm
LiPo
3.7V 300mAh LiPo Battery THOR-502530
5 × 25 × 30 mm
LiPo
3.7V 350mAh LiPo Battery THOR-702525
7 × 25 × 25 mm
LiPo
3.7V 380mAh LiPo Battery THOR-453030
4.5 × 30 × 30 mm
LiPo
3.7V 400mAh LiPo Battery THOR-702030
7 × 20 × 30 mm
LiPo
3.7V 450mAh LiPo Battery THOR-702530
7 × 25 × 30 mm
LiPo
3.7V 500mAh LiPo Battery THOR-502050
5 × 20 × 50 mm
LiPo
3.7V 500mAh LiPo Battery THOR-602535
6 × 25 × 35 mm
You May Also Like
Typical Applications — 3.7V ≤500mAh
TWS Earbuds
Ultra-compact cells that fit the charging case and each bud, with stable 3.7V output.
Wearables & Fitness Bands
High energy density in a thin, light pouch for all-day wear.
Smart Rings
Curved and micro form factors built to match tight ring geometry.
Hearing Aids & Medical
Reliable low self-discharge cells for critical always-on devices.
IoT Sensors & Trackers
Long standby cells for wireless sensors, GPS tags and beacons.
Bluetooth & Remote Devices
Consistent power for controllers, styluses and handheld gadgets.
Building something specific? Small Electronic Device Batteries·How custom battery projects work·Production process
Frequently Asked Questions
What is the minimum order quantity (MOQ) for custom LiPo batteries?
For custom sizes we are MOQ-friendly and can support small pilot runs. Engineering samples are available before mass production. Contact us with your target capacity and dimensions for an exact quote.
Can you customize the size, capacity and connector?
Yes. We build to your spec — thickness, width, length, capacity, wire length and connector (PH2.0, Molex 1.25 and others). Bare cells or cells with PCM/BMS and NTC are both available.
Do the cells include protection (PCM/BMS)?
Standard cells ship with a PCM board for overcharge, over-discharge and short-circuit protection, with auto-recovery. NTC thermistors are optional. You can also order bare cells if your PCBA already handles protection.
What certifications do your LiPo batteries have?
Our cells are UN38.3 certified for safe air transport. MSDS documentation is provided for shipping. Additional certifications can be discussed based on your target market and application.
How long does sampling and production take?
Samples from standard tooling ship in days. Custom-tooled models and mass production lead times depend on capacity and quantity — we confirm a schedule with you along with the official datasheet before you approve.
What is the cycle life of these batteries?
Standard cells deliver at least 500 charge cycles at 0.5C while retaining 80% or more of rated capacity. Actual life depends on charge/discharge conditions and operating temperature.
Related Articles
LiFePO4 Battery Safety Engineering Guide: BMS, Cell Balancing, Compression and Energy Storage Risk Control
By Victor Xiong · Reviewed by Dr. Maximilian Weber, Chief Scientist · Last reviewed: July 2026 Table of Contents 1.
July 13, 2026
Lithium-Ion Battery Safety Engineering Guide: Charging, BMS Protection, Thermal Runaway and OEM Risk Control
By Victor Xiong · Reviewed by Dr. Maximilian Weber, Chief Scientist · Last reviewed: July 2026 Table of Contents 1.
July 13, 2026
18650 Battery Safety Engineering Guide: Cell Selection, Pack Design, BMS Protection and OEM Risk Control
By Victor Xiong · Reviewed by Dr. Maximilian Weber, Chief Scientist · Last reviewed: July 2026 Table of Contents 1.
July 13, 2026