9V Rechargeable Battery 300mAh Ni-MH – Long Life Power Cell

The 9V Rechargeable Battery 300mAh Ni-MH – Long Life Power Cell is a reliable, reusable, and environmentally friendly power source designed to provide stable and consistent energy for a wide range of portable electronic devices and embedded systems. Built using advanced Nickel-Metal Hydride (Ni-MH) rechargeable battery technology, this battery offers dependable performance, long service life, and the convenience of repeated charging, making it an excellent alternative to disposable 9V batteries.

With a nominal output voltage of 9V and a capacity of 300mAh, this rechargeable battery is suitable for low- to moderate-power applications requiring a compact and reliable power supply. Its Ni-MH chemistry provides improved energy storage, reduced memory effect, and better environmental safety compared to older Nickel-Cadmium (Ni-Cd) rechargeable batteries.

Manufactured using high-quality rechargeable cells, the battery delivers stable voltage output, low internal resistance, and dependable performance throughout its discharge cycle. It can be recharged hundreds of times using a compatible 9V Ni-MH battery charger, helping reduce battery replacement costs while minimizing environmental waste.

The battery features a standard PP3 (9V) snap connector, making it compatible with most electronic devices designed to operate with conventional 9V batteries. Its compact size allows easy installation and replacement without requiring modifications.

The 9V Rechargeable Battery 300mAh Ni-MH is widely used in Arduino projects, multimeters, wireless transmitters, wireless receivers, smoke detectors (where rechargeable batteries are supported), guitar effect pedals, portable measuring instruments, educational electronics, robotics, IoT devices, security systems, alarm systems, electronic toys, medical devices, microphones, portable test equipment, sensors, and DIY electronics projects.

Whether you are powering a portable electronic device, building a battery-operated prototype, replacing disposable batteries, or developing embedded systems, this rechargeable battery offers a cost-effective, dependable, and environmentally responsible power solution.

Working Principle

The Ni-MH rechargeable battery stores electrical energy through reversible electrochemical reactions between a nickel oxide hydroxide positive electrode and a hydrogen-absorbing metal alloy negative electrode.

During charging, electrical energy is converted into chemical energy and stored inside the battery. During discharge, the stored chemical energy is converted back into electrical energy to power connected devices.

Unlike disposable batteries, the Ni-MH battery can be recharged hundreds of times using a compatible charger, making it both economical and environmentally friendly.

Key Features

• Nominal output voltage: 9V

• Battery capacity: 300mAh

• Nickel-Metal Hydride (Ni-MH) rechargeable battery

• Rechargeable hundreds of times

• Stable voltage output

• Low self-discharge

• Long cycle life

• Reduced memory effect

• Environmentally friendly alternative to disposable batteries

• Standard PP3 (9V) connector

• Reliable and consistent performance

• Compact and lightweight design

• Low maintenance

• Suitable for portable electronic devices

Applications

The 9V Rechargeable Battery 300mAh Ni-MH is widely used in:

• Arduino projects

• Multimeters

• ESP32 development (with suitable voltage regulation)

• Robotics

• IoT devices

• Wireless transmitters

• Wireless receivers

• Security systems

• Alarm systems

• Electronic toys

• Portable measuring instruments

• Educational electronics

• Guitar effect pedals

• Portable medical devices

• Microphones

• Sensors

• Test equipment

• DIY electronics

• Embedded systems

• Electronic prototyping

Specifications

• Product Type: Rechargeable Battery

• Battery Chemistry: Nickel-Metal Hydride (Ni-MH)

• Nominal Voltage: 9V

• Capacity: 300mAh

• Rechargeable: Yes

• Connector Type: Standard PP3 (9V) Snap Connector

• Charging Method: Compatible 9V Ni-MH Battery Charger

• Recharge Cycle Life: Hundreds of charge/discharge cycles

• Application: Portable electronic devices

Package Includes

• 1 × 9V Rechargeable Battery 300mAh Ni-MH

Safety Precautions

• Charge only with a compatible 9V Ni-MH battery charger.

• Do not short-circuit the battery terminals.

• Do not expose the battery to fire, excessive heat, or water.

• Store in a cool and dry environment when not in use.

• Do not disassemble, puncture, or crush the battery.

• Avoid mixing rechargeable batteries with disposable batteries.

• Remove the battery from devices during long periods of storage.

• Recycle the battery responsibly at an approved recycling facility.