2PCS 602530 440mAh 3.7V Li-Polymer Rechargeable Battery with Protection Board for DIY Electronics Toys

Description

Package content: 2 x batteries (sold as 2pcs/lot)
Battery model: 602530
Capacity: 440mAh / 1.628Wh (per battery)
Rated voltage: 3.7V
Charge limit voltage: 4.26V (max)
Discharge cut-off voltage: 2.75V
Battery type: Li-Polymer (with built-in PCM protection board)
Dimensions (single): 30 x 25 x 6mm / 1.18 x 0.98 x 0.24 inches
Weight: 8g per battery
Discharge current: 0.5C (220mA)
Charge current: 0.5C (220mA)
Connection: 2-wire pigtail (Red wire “+” Positive, Black wire “-” Negative) — no connector
Compatible with: Driving Recorder, Early Education Toy, Voice Recorder, Small Speaker, Wireless Keyboard/Mouse, Bluetooth Headset, LED Light, Smart Wearable, Beauty Instrument, Portable WiFi, DIY 3.7V Electronic Projects
Power up your portable electronics with this 2‑pack 602530 440mAh rechargeable Li‑Polymer battery set. Perfect for driving recorders (dash cams), early education story machines, voice recorders, small speakers, wireless keyboards/mice, Bluetooth headsets, LED lights, smart wearables, beauty instruments, portable WiFi hotspots, and various DIY 3.7V electronic projects. Each battery delivers factory-rated 440mAh capacity with built‑in protection against overcharge, over‑discharge, short circuit, and overcurrent — ensuring safe and reliable operation for your devices.
Manufactured with high‑quality Grade A Li‑Polymer cells and equipped with integrated PCM protection board. The protection features include overcharge protection (detection 4.26±0.05V), over‑discharge protection (detection 2.75±0.1V), overcurrent protection, and short circuit protection. With a cycle life of 500 cycles retaining 80% of original capacity, these batteries offer reliable long‑term performance. CE, RoHS, and UN38.3 certified for safe transport and use. Operating temperature range: charge 0‑45°C, discharge ‑20 to 60°C.
Compatibility Note: Please check your original battery model and device voltage before ordering. Verify that your device’s battery compartment measures approximately 30×25×6mm and requires 3.7V. Red wire positive (+), black wire negative (-). Not suitable for high‑power devices like power tools or drones.
Installation Tip: If your original battery has a different connector, cut the connector from the old battery (keep at least 5cm of wire) and solder it to the new battery wires — red to red, black to black — then insulate with heat shrink. Always verify polarity before soldering.
Battery Care Tips: Avoid full discharge — recharge when battery level drops below 20%. Do not expose to high temperatures or direct sunlight. New batteries require 3‑5 full charge cycles to reach optimal capacity. Always use a compatible 3.7V Li‑Po charger (≤220mA). Store in a cool, dry place when not in use.