Mono Bluetooth Amplifier PCBA – 4Ω 3W with Battery Charging
Mono Bluetooth Amplifier PCBA – 4Ω 3W with Battery Charging
Mono Bluetooth Power Amplifier PCBA – 4Ω 3W with Integrated Lithium Battery Charging
Take your DIY audio projects to the next level with this compact Mono Bluetooth Power Amplifier PCBA. Delivering 3W of output power into a 4-ohm load, this surface-mount board integrates a Bluetooth module and a 3.7V lithium battery charging circuit all in one — making it ideal for building portable speakers, desktop audio devices, and custom electronics projects.
Whether you're a hobbyist, maker, or electronics engineer, this all-in-one amplifier board saves you hours of design time by combining wireless audio reception, amplification, and battery management on a single PCB.
Key Features
- Output Power: 3W mono into a 4Ω (ohm) load
- Input Voltage: 3.7V (compatible with standard single-cell lithium batteries)
- Integrated Bluetooth Module: Wireless audio streaming built right onto the board
- Onboard Lithium Battery Charging: Charges your 3.7V Li-Ion/LiPo battery directly from the board — no external charger needed
- SMD Package: Compact surface-mount design for space-efficient builds
- New Condition: Ships brand new, ready for integration
- No High-Concern Chemicals: Clean, RoHS-compliant build
Ideal For
- DIY portable Bluetooth speakers
- Desktop computer audio upgrades
- Custom battery-powered audio devices
- Electronics prototyping and maker projects
- STEM education and hobbyist builds
Specifications
| Output Power | 3W |
| Impedance | 4 Ohms (Mono) |
| Supply Voltage | 3.7V (Lithium Battery Input) |
| Battery Charging | Integrated 3.7V Li-Ion/LiPo Charging Circuit |
| Wireless | Bluetooth Module Included |
| Package Type | SMD (Surface Mount Device) |
| Condition | New |
| Country of Origin | Made in Mainland China |
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Frequently Asked Questions
Q: What battery type is compatible with this Bluetooth amplifier PCBA?
A: This board is designed to work with standard 3.7V single-cell lithium-ion (Li-Ion) or lithium polymer (LiPo) batteries. The integrated charging circuit manages safe charging directly on the board, so no external charger is required.
Q: Can I use this amplifier board to build a portable Bluetooth speaker?
A: Absolutely. The board combines a Bluetooth audio receiver, a 3W mono amplifier (4Ω), and a lithium battery charger on one compact SMD PCBA — everything you need for a self-contained portable Bluetooth speaker build, minus the enclosure and speaker driver.
Q: What is the maximum speaker impedance this board supports?
A: This amplifier PCBA is rated for a 4-ohm mono speaker load at 3W output. Using a speaker with different impedance may affect output power and performance, so a 4Ω speaker is recommended for optimal results.