his 3.7V 200mAh (Lithium Polymer) Lipo Rechargeable battery is compact and thin. This battery has built-in overcharge protection. These Batteries are widely used in GPS devices, iPod, MP3 Player, FM, Bluetooth Speaker, IoT and other DIY and Industrial applications. Due to its compact size, it can fit anywhereA 3.7V 200mAh Lithium Polymer (LiPo) battery is a single-cell (1S) rechargeable power source characterized by its high energy density and slim, flexible form factor. These batteries use a polymer gel electrolyte instead of a liquid one, allowing them to be manufactured in various thin geometries and making them more resistant to physical abuse compared to standard Li-ion cells.
Key Features & Safety
Integrated PCM: Most quality units include a Protection Circuit Module (PCM) that prevents overcharging (>4.2V), over-discharging (<3.0V), and short circuits.
No Memory Effect: Can be recharged at any time without needing to be fully discharged first.
Low Self-Discharge: Retains its charge for a long time when not in use, typically losing only 1–2% per month.
Connector Options: Usually comes with bare wire leads or a pre-attached JST connector (commonly 2.0mm or 1.25mm pitch)
Common Applications
These batteries are optimized for low-power, space-constrained devices:
Wearables: Fitness trackers, smartwatches, and medical sensors.
Audio: Bluetooth headsets, wireless earbuds, and portable speakers.
Hobbies: Micro drones, RC toys, and DIY IoT projects.
Electronics: GPS units, MP4 players, and backup power for memory circuits
Typical Dimensions by Model
The model number usually dictates the size in millimeters (Thickness x Width x Length).